<SEC-DOCUMENT>0001193125-25-254538.txt : 20251029
<SEC-HEADER>0001193125-25-254538.hdr.sgml : 20251029
<ACCEPTANCE-DATETIME>20251029060648
ACCESSION NUMBER:		0001193125-25-254538
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20251029
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20251029
DATE AS OF CHANGE:		20251029

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		ORGANIZATION NAME:           	06 Technology
		EIN:				470783182
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		251426631

	BUSINESS ADDRESS:	
		STREET 1:		169 INVERNESS DR W
		STREET 2:		SUITE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80112
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		169 INVERNESS DR W
		STREET 2:		SUITE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80112
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d939238d8k.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<html xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:csgs="http://www.csgi.com/20251029" xmlns:deprecated="http://www.xbrl.org/2009/arcrole/deprecated" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:currency="http://xbrl.sec.gov/currency/2025" xmlns:exch="http://xbrl.sec.gov/exch/2025" xmlns:naics="http://xbrl.sec.gov/naics/2025" xmlns:sic="http://xbrl.sec.gov/sic/2025" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:srt="http://fasb.org/srt/2025" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2022-02-16" xmlns:xbrll="http://www.xbrl.org/2003/linkbase" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>8-K</title>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type"/>
</head>
<body style="line-height:normal;background-color:white;"><div style="display: none"><ix:header><ix:hidden><ix:nonNumeric name="dei:AmendmentFlag" contextRef="P10_29_2025To10_29_2025" id="ixv-295">false</ix:nonNumeric><ix:nonNumeric name="dei:EntityCentralIndexKey" contextRef="P10_29_2025To10_29_2025" id="ixv-296">0001005757</ix:nonNumeric><ix:nonNumeric name="dei:EntityAddressStateOrProvince" id="hidden148550385" contextRef="P10_29_2025To10_29_2025">CO</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:type="simple" xlink:href="csgs-20251029.xsd"/></ix:references><ix:resources><xbrli:context id="P10_29_2025To10_29_2025"> <xbrli:entity> <xbrli:identifier scheme="http://www.sec.gov/CIK">0001005757</xbrli:identifier> </xbrli:entity> <xbrli:period> <xbrli:startDate>2025-10-29</xbrli:startDate> <xbrli:endDate>2025-10-29</xbrli:endDate> </xbrli:period> </xbrli:context></ix:resources></ix:header></div><div><div><div style="line-height:normal;display: inline;"><div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"><div style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</div><div style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</div><div style="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">UNITED STATES </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">SECURITIES AND EXCHANGE COMMISSION </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Washington, D.C. 20549 </div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="text-align:center"><div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div><div style="margin-top:10pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">FORM <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"><ix:nonNumeric name="dei:DocumentType" contextRef="P10_29_2025To10_29_2025" id="ixv-307">8-K</ix:nonNumeric></div> </div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="text-align:center"><div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div><div style="margin-top:10pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">CURRENT REPORT </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">PURSUANT TO SECTION 13 OR 15(d) </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">OF THE SECURITIES EXCHANGE ACT OF 1934 </div><div style="margin-top:10pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Date of Report (Date of Earliest Event Reported): <ix:nonNumeric name="dei:DocumentPeriodEndDate" contextRef="P10_29_2025To10_29_2025" format="ixt:date-monthname-day-year-en" id="ixv-308">October 29, 2025</ix:nonNumeric> </div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="text-align:center"><div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div><div style="margin-top:10pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityRegistrantName" contextRef="P10_29_2025To10_29_2025" id="ixv-309">CSG SYSTEMS INTERNATIONAL, INC.</ix:nonNumeric> </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Exact Name of Registrant as Specified in its Charter) </div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="text-align:center"><div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:8pt;width:100%;border-spacing:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;"><ix:nonNumeric name="dei:EntityIncorporationStateCountryCode" contextRef="P10_29_2025To10_29_2025" format="ixt-sec:stateprovnameen" id="ixv-310">Delaware</ix:nonNumeric></div></div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;"><div style="white-space:nowrap;display:inline;"><ix:nonNumeric name="dei:EntityFileNumber" contextRef="P10_29_2025To10_29_2025" id="ixv-311">0-27512</ix:nonNumeric></div></div></div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;"><div style="white-space:nowrap;display:inline;"><ix:nonNumeric name="dei:EntityTaxIdentificationNumber" contextRef="P10_29_2025To10_29_2025" id="ixv-312">47-0783182</ix:nonNumeric></div></div></div></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">(State or Other Jurisdiction<br/>of Incorporation)</div></div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">(Commission</div><div style="margin-top: 0pt; margin-bottom: 1pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">File Number)</div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">(IRS Employer<br/>Identification No.)</div></div></td></tr></table><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border-spacing:0;margin:0 auto">
<tr>
<td style="width:50%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:48%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;"><ix:nonNumeric name="dei:EntityAddressAddressLine1" contextRef="P10_29_2025To10_29_2025" id="ixv-313">169 Inverness Dr W</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressAddressLine2" contextRef="P10_29_2025To10_29_2025" id="ixv-314">Ste 300</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressCityOrTown" contextRef="P10_29_2025To10_29_2025" id="ixv-315">Englewood</ix:nonNumeric>, <div style="-sec-ix-hidden:hidden148550385;display:inline;">CO</div></div></div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;"><ix:nonNumeric name="dei:EntityAddressPostalZipCode" contextRef="P10_29_2025To10_29_2025" id="ixv-316">80112</ix:nonNumeric></div></div></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">(Address of Principal Executive Offices)</div></div></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">(Zip Code)</div></div></td></tr></table><div style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(<ix:nonNumeric name="dei:CityAreaCode" contextRef="P10_29_2025To10_29_2025" id="ixv-317">303</ix:nonNumeric>) <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"><ix:nonNumeric name="dei:LocalPhoneNumber" contextRef="P10_29_2025To10_29_2025" id="ixv-318">200-2000</ix:nonNumeric></div> </div><div style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Registrant&#8217;s Telephone Number, Including Area Code) </div><div style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">Former Name or Former Address, If Changed Since Last Report: N/A </div><div style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="text-align:center"><div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div><div style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box below if the Form <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">8-K</div> filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: </div><div style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:WrittenCommunications" contextRef="P10_29_2025To10_29_2025" format="ixt:fixed-false" id="ixv-319">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </div></td></tr></table><div style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:SolicitingMaterial" contextRef="P10_29_2025To10_29_2025" format="ixt:fixed-true" id="ixv-320">&#9746;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;">Soliciting material pursuant to Rule <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">14a-12</div> under the Exchange Act (17 CFR <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">240.14a-12)</div> </div></td></tr></table><div style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:PreCommencementTenderOffer" contextRef="P10_29_2025To10_29_2025" format="ixt:fixed-false" id="ixv-321">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;"><div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">Pre-commencement</div> communications pursuant to Rule <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">14d-2(b)</div> under the Exchange Act (17 CFR <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">240.14d-2(b))</div> </div></td></tr></table><div style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" contextRef="P10_29_2025To10_29_2025" format="ixt:fixed-false" id="ixv-322">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; text-align: left; line-height: normal;"><div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">Pre-commencement</div> communications pursuant to Rule <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">13e-4(c)</div> under the Exchange Act (17 CFR <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">240.13e-4(c))</div> </div></td></tr></table><div style="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Securities registered pursuant to Section&#160;12(b) of the Act: </div><div style="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:8pt;width:100%;border-spacing:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;white-space:nowrap;text-align:center"><div style="margin-top: 0pt; margin-bottom: 1pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">Title of Each Class</div></td>
<td style="vertical-align: bottom; padding-bottom: 0.5pt;">&#160;</td>
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center"><div style="margin-top: 0pt; margin-bottom: 1pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">Trading<br/>Symbol(s)</div></td>
<td style="vertical-align: bottom; padding-bottom: 0.5pt;">&#160;</td>
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center"><div style="margin-top: 0pt; margin-bottom: 1pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">Name of Each Exchange on<br/>which Registered</div></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;text-align:center"><ix:nonNumeric name="dei:Security12bTitle" contextRef="P10_29_2025To10_29_2025" id="ixv-323">Common Stock, par value $0.01 per share</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><ix:nonNumeric name="dei:TradingSymbol" contextRef="P10_29_2025To10_29_2025" id="ixv-324">CSGS</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><ix:nonNumeric name="dei:SecurityExchangeName" contextRef="P10_29_2025To10_29_2025" format="ixt-sec:exchnameen" id="ixv-325">The NASDAQ Stock Market LLC</ix:nonNumeric></td></tr></table><div style="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;&#160;230.405 of this chapter) or Rule <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">12b-2</div> of the Securities Exchange Act of 1934 <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">(&#167;&#160;240.12b-2</div> of this chapter). </div><div style="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Emerging growth company&#8194;<ix:nonNumeric name="dei:EntityEmergingGrowthCompany" contextRef="P10_29_2025To10_29_2025" format="ixt:fixed-false" id="ixv-326">&#9744;</ix:nonNumeric> </div><div style="margin-top:8pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&#160;13(a) of the Exchange Act.&#8194;&#9744; </div><div style="font-size:8pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</div><div style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</div></div></div><div style="margin-top:1em; margin-bottom:0em; page-break-before:always"></div><hr style="color:#999999;height:3px;width:100%;clear:both"/><div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top;text-align:left"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">Item&#8201;8.01</div></div></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: left; line-height: normal;">Other Events. </div></td></tr></table><div style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On October&#160;29, 2025, CSG Systems International, Inc., a Delaware corporation (the &#8220;Company&#8221;), and NEC Corporation, a company incorporated under the laws of Japan (&#8220;Parent&#8221;), issued a joint press release announcing the execution of an Agreement and Plan of Merger (the &#8220;Merger Agreement&#8221;), dated as of October&#160;29, 2025, by and among the Company, Parent and Canvas Transaction Company, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (&#8220;Merger Sub&#8221;), pursuant to which, on the terms and subject to the conditions set forth in the Merger Agreement, Merger Sub will merge with and into the Company (the &#8220;Merger&#8221;), with the Company continuing as the surviving corporation in the Merger and a wholly owned subsidiary of Parent. </div><div style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein. The information required to be reported by the Company on a Current Report on Form <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">8-K</div> with respect to entry into the Merger Agreement will be filed in a separate Current Report on Form <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">8-K.</div> </div><div style="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top;text-align:left"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">Item&#8201;9.01</div></div></td>
<td style="vertical-align:top;text-align:left"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: left; line-height: normal;">Financial Statements and Exhibits. </div></td></tr></table><div style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(d) Exhibits. </div><div style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</div><div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:92%;border-spacing:0;margin-left:auto">
<tr>
<td/>
<td style="vertical-align:bottom;width:4%"/>
<td style="width:93%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="vertical-align:bottom;white-space:nowrap;text-align:center"><div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">Exhibit</div><div style="margin-top: 0pt; margin-bottom: 1pt; border-bottom: 1pt solid rgb(0, 0, 0); display: inline-block; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; text-align: center; line-height: normal;">No.</div></td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:bottom;white-space:nowrap"><div style="margin-top: 0pt; margin-bottom: 0pt; border-bottom: 1pt solid rgb(0, 0, 0); display: table-cell; font-size: 8pt; font-family: &quot;Times New Roman&quot;; font-weight: bold; line-height: normal;">Description</div></td></tr>
<tr style="font-size:1pt">
<td style="height:6pt"/>
<td colspan="2" style="height:6pt"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">99.1</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top"><a href="d939238dex991.htm">Joint Press Release, dated as of October&#160;29, 2025. </a></td></tr>
<tr style="font-size:1pt">
<td style="height:6pt"/>
<td colspan="2" style="height:6pt"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">104</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top">Cover Page Interactive Data File (embedded within the Inline XBRL document)</td></tr></table></div><div style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold">Forward-Looking Statements </div><div style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This Form <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">8-K</div> contains &#8220;forward-looking statements&#8221; within the meaning of Section&#160;27A of the Securities Act of 1933, as amended, and Section&#160;21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Forward-looking statements include, but are not limited to, statements concerning the Company&#8217;s expectations, plans, intentions, strategies or prospects with respect to the proposed Merger. These statements are often identified by the use of words such as &#8220;anticipate,&#8221; &#8220;believe,&#8221; &#8220;continue,&#8221; &#8220;could,&#8221; &#8220;estimate,&#8221; &#8220;expect,&#8221; &#8220;intend,&#8221; &#8220;may,&#8221; &#8220;plan,&#8221; &#8220;hope,&#8221; &#8220;hopeful,&#8221; &#8220;likely,&#8221; &#8220;may,&#8221; &#8220;optimistic,&#8221; &#8220;possible,&#8221; &#8220;potential,&#8221; &#8220;preliminary,&#8221; &#8220;project,&#8221; &#8220;should,&#8221; &#8220;will,&#8221; &#8220;would&#8221; or the negative or plural of these words or similar expressions or variations. Forward-looking statements are made based upon management&#8217;s current expectations and beliefs and are not guarantees of future performance. Such forward-looking statements are subject to a number of risks, uncertainties, assumptions and other factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by the forward-looking statements. These factors include, among others: (i)&#160;the ability of the parties to complete the proposed transaction on the anticipated terms and timing, or at all, (ii)&#160;the satisfaction or waiver of other conditions to the completion of the proposed transaction, including obtaining required shareholder and regulatory approvals; (iii)&#160;the risk that the Company&#8217;s stock price may fluctuate during the pendency of the proposed transaction and may decline if the proposed transaction is not completed; (iv)&#160;potential litigation relating to the proposed transaction that could be instituted against the Company or its directors, managers or officers, including the delay, expense or other effects of any outcomes related thereto; (v)&#160;the risk that disruptions from the proposed transaction will harm the Company&#8217;s business, including current plans and operations, including during the pendency of the proposed transaction; (vi)&#160;the ability of the Company to retain, motivate, and hire key personnel; (vii)&#160;the diversion of management&#8217;s time and attention from ordinary course business operations to completion of the proposed transaction and integration matters; (viii)&#160;potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction; (ix)&#160;legislative, regulatory and economic developments; (x)&#160;potential business uncertainty, including changes to existing business relationships, during the pendency of the proposed transaction that could affect the Company&#8217;s financial performance; (xi)&#160;certain restrictions during the pendency of the proposed transaction that may impact the Company&#8217;s ability to pursue certain business opportunities or strategic transactions; (xii)&#160;unpredictability and severity of catastrophic events, including but not limited to acts of </div><div style="font-size:18pt; margin-top:0pt; margin-bottom:0pt">&#160;</div></div></div><div style="margin-top:1em; margin-bottom:0em; page-break-before:always"></div><hr style="color:#999999;height:3px;width:100%;clear:both"/><div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"><div style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">terrorism, outbreaks of war or hostilities or global pandemics, as well as management&#8217;s response to any of the aforementioned factors; (xiii)&#160;the possibility that the proposed transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events; (xiv)&#160;unexpected costs, liabilities or delays associated with the transaction; (xv)&#160;the response of competitors to the transaction; (xvi)&#160;the occurrence of any event, change or other circumstance that could give rise to the termination of the proposed transaction, including in circumstances requiring the Company to pay a termination fee; (xvii)&#160;the ability to realize the anticipated benefits of the Merger, including the expected synergies and cost saving; (xviii)&#160;the possibility that competing or superior acquisition proposals for the Company will be made; and (xix)&#160;other risks set forth under the heading &#8220;Risk Factors,&#8221; of the Company&#8217;s Annual Report on Form <div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;">10-K</div> for the year ended December&#160;31, 2024 and in the Company&#8217;s subsequent filings with the Securities and Exchange Commission (&#8220;SEC&#8221;). You should not rely upon forward-looking statements as predictions of future events. Actual results and outcomes could differ materially from the results described in or implied by such forward looking statements. Forward-looking statements speak only as of the date hereof, and, except as required by law, the Company undertakes no obligation to update or revise these forward-looking statements. </div><div style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold">Additional Information and Where to Find It </div><div style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This communication does not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities or a solicitation of any vote or approval. This communication relates to a proposed acquisition of the Company by Parent. In connection with this proposed acquisition, the Company plans to file one or more proxy statements or other documents with the SEC. This communication is not a substitute for any proxy statement or other document that the Company may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF THE COMPANY ARE URGED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS THAT MAY BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Any definitive proxy statement(s) (if and when available) will be mailed to stockholders of CSG Systems International, Inc. Investors and security holders will be able to obtain free copies of these documents (if and when available) and other documents filed with the SEC by the Company through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed with the SEC by the Company will be available free of charge on the Company&#8217;s internet website at https://ir.csgi.com/investor-home/default.aspx or upon written request to: CSG Systems International, Inc., Investor Relations, 169 Inverness Dr W, Suite 300, Englewood, CO 80112, or by email at john.rea@csgi.com. </div><div style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold">Participants in Solicitation </div><div style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Company, its directors and certain of its executive officers may be considered participants in the solicitation of proxies in connection with the proposed transaction. Information about the directors and executive officers of the Company is set forth in its Proxy Statement on Schedule 14A for its 2025 annual meeting of stockholders (the &#8220;2025 Proxy&#8221;), which was filed with the SEC on April&#160;1, 2025. To the extent that holdings of CSG Systems International, Inc.&#8217;s securities by its directors or executive officers have changed since the amounts set forth in the 2025 Proxy for its 2025 annual meeting of stockholders, such changes have been or will be reflected on Initial Statements of Beneficial Ownership on Form 3 or Statements of Change in Ownership on Form 4 filed with the SEC. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement relating to the proposed transaction and other relevant materials to be filed with the SEC when they become available. These documents can be obtained free of charge from the sources indicated above. </div><div style="font-size:18pt; margin-top:0pt; margin-bottom:0pt">&#160;</div></div></div><div style="margin-top:1em; margin-bottom:0em; page-break-before:always"></div><hr style="color:#999999;height:3px;width:100%;clear:both"/><div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"><div style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">SIGNATURES </div><div style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. </div><div style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</div>
<table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border-spacing:0">
<tr>
<td style="width:45%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:4%"/>
<td style="vertical-align:bottom"/>
<td style="width:3%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:45%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td colspan="3" style="vertical-align:bottom"><div style="letter-spacing: 0px; top: 0px;display:inline;"><div style="font-weight:bolder;display:inline;">CSG SYSTEMS INTERNATIONAL, INC.</div></div></td></tr>
<tr style="font-size:1pt">
<td style="height:12pt"/>
<td colspan="2" style="height:12pt"/>
<td colspan="2" style="height:12pt"/>
<td colspan="2" style="height:12pt"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom">Date: October&#160;29, 2025</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top">By:</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"><div style="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Rasmani Bhattacharya</div></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">Rasmani Bhattacharya</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">Chief Legal Officer</td></tr></table></div></div></div></div></div>
</body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d939238dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
<HTML><HEAD>
<TITLE>EX-99.1</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE" STYLE="line-height:Normal">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>NEC to Acquire CSG, Strengthening Its Position as a Global Leader in Digital Transformation </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>TOKYO, Japan and DENVER, Colorado</B> &#8211; October&nbsp;29, 2025 &#8211; NEC Corporation (TSE: 6701) (&#8220;NEC&#8221;) and CSG Systems International,
Inc. (NASDAQ: CSGS) (&#8220;CSG&#8221;) today announced they have entered into a definitive agreement under which NEC will acquire CSG for US$80.70 per share in cash, for a total enterprise value of approximately US$2.9&nbsp;billion, or
JPY438.5&nbsp;billion, including debt. The transaction price represents a 17.38% premium over CSG&#8217;s closing price of US$68.75 on October&nbsp;28, 2025, and a 23.07% premium to the volume-weighted average price (VWAP) of CSG common stock for
the 30 days ending October&nbsp;28, 2025. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The transaction strengthens NEC&#8217;s position as a leader in next-generation digital solutions and
accelerates AI and cloud-driven innovation for customers across industries. It will bring together complementary software and services across digital transformation, expanding NEC&#8217;s <FONT STYLE="white-space:nowrap"><FONT
STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">software-as-a-service</FONT></FONT></FONT> (SaaS) portfolio, customer footprint, and global reach. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Adding CSG&#8217;s proven SaaS product portfolio and strong global customer base to NEC and its subsidiary, Netcracker, delivers meaningful value to customers
through a diversified and expanded product portfolio. The transaction will enable NEC to deliver a more competitive offering in next-generation environments, such as global communication service providers, and to leading brands in high-growth
sectors such as media, financial services, healthcare, retail and logistics. The transaction builds on the capabilities of NEC&#8217;s subsidiary, Netcracker, which provides a complementary global footprint and deep expertise in BSS (Business
Support Systems) and OSS (Operational Support Systems), aligning naturally with CSG&#8217;s strengths. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The agreement has been unanimously approved by
both companies&#8217; Boards. The transaction is expected to close within the 2026 calendar year, subject to the satisfaction of customary closing conditions, including approval by CSG shareholders and receipt of required regulatory approvals. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Advisors </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Goldman Sachs is serving as financial advisor,
Freshfields is serving as legal advisor, and FGS Global is serving as strategic communications advisor to NEC. Jefferies is serving as financial advisor, Simpson Thacher&nbsp;&amp; Bartlett LLP is serving as legal advisor, and Joele Frank, Wilkinson
Brimmer Katcher is serving as strategic communications advisor to CSG. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About NEC </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The NEC Group leverages technology to create social value and promote a more sustainable world where everyone has the chance to reach their full potential.
</P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">NEC Corporation was established in 1899. Today, the NEC Group&#8217;s approximately 110,000 employees utilize world-leading AI, security, and
communications technologies to solve the most pressing needs of customers and society. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About CSG </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">CSG empowers companies to build unforgettable experiences, making it easier for people and businesses to connect with, use and pay for the services they value
most. Our customer experience, billing and payments solution help companies of any size make money and make a difference. With our SaaS solutions, company leaders can take control of their future and tap into guidance along the way from our fiercely
committed and forward-thinking CSGers around the world. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">1 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>FORWARD-LOOKING STATEMENTS </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The foregoing contains &#8220;forward-looking statements&#8221; within the meaning of Section&nbsp;27A of the Securities Act of 1933, as amended, and
Section&nbsp;21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Forward-looking statements include, but are not limited to, statements concerning the Company&#8217;s expectations, plans, intentions, strategies or prospects
with respect to the proposed transaction. These statements are often identified by the use of words such as &#8220;anticipate,&#8221; &#8220;believe,&#8221; &#8220;continue,&#8221; &#8220;could,&#8221; &#8220;estimate,&#8221; &#8220;expect,&#8221;
&#8220;intend,&#8221; &#8220;may,&#8221; &#8220;plan,&#8221; &#8220;hope,&#8221; &#8220;hopeful,&#8221; &#8220;likely,&#8221; &#8220;may,&#8221; &#8220;optimistic,&#8221; &#8220;possible,&#8221; &#8220;potential,&#8221; &#8220;preliminary,&#8221;
&#8220;project,&#8221; &#8220;should,&#8221; &#8220;will,&#8221; &#8220;would&#8221; or the negative or plural of these words or similar expressions or variations. Forward-looking statements are made based upon management&#8217;s current
expectations and beliefs and are not guarantees of future performance. Such forward-looking statements are subject to a number of risks, uncertainties, assumptions and other factors that could cause actual results and the timing of certain events to
differ materially from future results expressed or implied by the forward-looking statements. These factors include, among others: (i)&nbsp;the ability of the parties to complete the proposed transaction on the anticipated terms and timing, or at
all; (ii)&nbsp;the satisfaction or waiver of other conditions to the completion of the proposed transaction, including obtaining required shareholder and regulatory approvals; (iii)&nbsp;the risk that the Company&#8217;s stock price may fluctuate
during the pendency of the proposed transaction and may decline if the proposed transaction is not completed; (iv)&nbsp;potential litigation relating to the proposed transaction that could be instituted against the Company or its directors, managers
or officers, including the delay, expense or other effects of any outcomes related thereto; (v)&nbsp;the risk that disruptions from the proposed transaction will harm the Company&#8217;s business, including current plans and operations, including
during the pendency of the proposed transaction; (vi)&nbsp;the ability of the Company to retain, motivate and hire key personnel; (vii)&nbsp;the diversion of management&#8217;s time and attention from ordinary course business operations to
completion of the proposed transaction and integration matters; (viii)&nbsp;potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction; (ix)&nbsp;legislative,
regulatory and economic developments; (x)&nbsp;potential business uncertainty, including changes to existing business relationships, during the pendency of the proposed transaction that could affect the Company&#8217;s financial performance;
(xi)&nbsp;certain restrictions during the pendency of the proposed transaction that may impact the Company&#8217;s ability to pursue certain business opportunities or strategic transactions; (xii)&nbsp;unpredictability and severity of catastrophic
events, including but not limited to acts of terrorism, outbreaks of war or hostilities or global pandemics, as well as management&#8217;s response to any of the aforementioned factors; (xiii)&nbsp;the possibility that the proposed transaction may
be more expensive to complete than anticipated, including as a result of unexpected factors or events; (xiv)&nbsp;unexpected costs, liabilities or delays associated with the transaction; (xv)&nbsp;the response of competitors to the transaction;
(xvi)&nbsp;the occurrence of any event, change or other circumstance that could give rise to the termination of the proposed transaction, including in circumstances requiring the Company to pay a termination fee; (xvii)&nbsp;the ability to realize
the anticipated benefits of the proposed transaction, including the expected synergies and cost saving; (xviii)&nbsp;the possibility that competing or superior acquisition proposals for the Company will be made; and (xix)&nbsp;other risks set forth
under the heading &#8220;Risk Factors,&#8221; of the Company&#8217;s Annual Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December&nbsp;31, 2024 and in the Company&#8217;s subsequent filings with the Securities and
Exchange Commission. You should not rely upon forward-looking statements as predictions of future events. Actual results and outcomes could differ materially from the results described in or implied by such forward-looking statements.
Forward-looking statements speak only as of the date hereof, and, except as required by law, the Company undertakes no obligation to update or revise these forward-looking statements. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>ADDITIONAL INFORMATION AND WHERE TO FIND IT </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This communication does not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities or a solicitation of any vote or
approval. This communication relates to a proposed acquisition of CSG Systems International, Inc. by NEC Corporation. In connection with this proposed acquisition, CSG Systems International, Inc. plans to file one or more proxy statements or other
documents with the SEC. This communication is not a substitute for any proxy statement or other document that CSG Systems International, Inc. may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF CSG
SYSTEMS INTERNATIONAL, INC. ARE URGED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS THAT MAY BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Any definitive proxy
statement(s) (if and when available) will be mailed to stockholders of CSG Systems International, Inc. Investors and security holders will be able to obtain free copies of these documents (if and when available) and other documents filed with the
SEC by CSG Systems International, Inc. through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed with the SEC by CSG Systems International, Inc. will be available free of charge on CSG Systems International,
Inc.&#8217;s internet website at https://ir.csgi.com/investor-home/default.aspx or upon written request to: CSG Systems International, Inc., Investor Relations, 169 Inverness Dr W, Suite 300, Englewood, CO 80112, or by email at john.rea@csgi.com.
</P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Participants in Solicitation </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">CSG Systems
International, Inc., its directors and certain of its executive officers and employees may be deemed to be participants in the solicitation of proxies in connection with the proposed transaction. Information about the directors and executive
officers of CSG Systems International, Inc. is set forth in its proxy statement for its 2025 annual meeting of stockholders, which was filed with the SEC on April&nbsp;1, 2025. To the extent that holdings of CSG Systems International, Inc.&#8217;s
securities by its directors or executive officers have changed since the amounts set forth in CSG Systems International, Inc.&#8217;s proxy statement for its 2025 annual meeting of stockholders, such changes have been or will be reflected on Initial
Statements of beneficial Ownership on Form 3 or Statements of Change in Ownership on Form 4 filed with the SEC. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Additional information regarding the
participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement relating to the proposed transaction and other relevant materials to be
filed with the SEC when they become available. These documents can be obtained free of charge from the sources indicated above. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">CSG Systems
International, Inc. </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Investor Relations </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">129 Inverness Dr W,
Suite 300, Englewood, CO 80112 </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">john.rea@csgi.com </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">https://ir.csgi.com/investor-home/default.aspx </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>CONTACTS </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>For NEC </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Media </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Joseph Jasper </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><FONT STYLE="white-space:nowrap">j-jasper@nec.com</FONT> </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Danya
Al-Qattan/Ben Spicehandler </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">FGS Global </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(212) <FONT
STYLE="white-space:nowrap">687-8080</FONT> </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Investors </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">IR office </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Email: ir@info.jp.nec.com </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>For CSG </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Media </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Kristine Ostegaard </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Kristine.ostegaard@csgi.com </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">+44 (0)79 2047 7204 </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Tim Lynch/Mahmoud Siddig </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Joele Frank, Wilkinson Brimmer Katcher </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(212) <FONT
STYLE="white-space:nowrap">355-4449</FONT><B> </B> </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Investors </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">John Rea </P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">John.rea@csgi.com </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(303) <FONT STYLE="white-space:nowrap">200-3161</FONT> </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">4 </P>

</DIV></Center>

</BODY></HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>csgs-20251029.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="utf-8"?>
<!--Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 29-October-2025 [01:49:29] {PM}-->
<schema targetNamespace="http://www.csgi.com/20251029" elementFormDefault="qualified" xmlns:csgs="http://www.csgi.com/20251029" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:currency="http://xbrl.sec.gov/currency/2025" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:exch="http://xbrl.sec.gov/exch/2025" xmlns:naics="http://xbrl.sec.gov/naics/2025" xmlns:sic="http://xbrl.sec.gov/sic/2025" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" xmlns:deprecated="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" xmlns:srt="http://fasb.org/srt/2025" xmlns:srt-types="http://fasb.org/srt-types/2025" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31">
  <annotation>
    <appinfo>
      <link:roleType roleURI="http://www.csgi.com/role/CoverPage" id="CoverPage">
        <link:definition>1001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:linkbase id="lnk" >
        <link:roleRef xlink:type="simple" xlink:href="csgs-20251029.xsd#CoverPage" roleURI="http://www.csgi.com/role/CoverPage"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" roleURI="http://www.xbrl.org/2009/role/negatedLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" roleURI="http://www.xbrl.org/2009/role/negatedNetLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel"  />
        <link:roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" roleURI="http://www.xbrl.org/2009/role/netLabel"  />
        <link:presentationLink xlink:type="extended" xlink:role="http://www.csgi.com/role/CoverPage" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:label="loc_dei_CoverAbstract_2" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_3" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_2" xlink:to="loc_dei_DocumentInformationTable_3" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_3" xlink:to="loc_dei_LegalEntityAxis_4" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_4" xlink:to="loc_dei_EntityDomain_5" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_8" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_3" xlink:to="loc_dei_DocumentInformationLineItems_8" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_9" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_DocumentType_9" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_27" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_AmendmentFlag_27" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_10" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_DocumentPeriodEndDate_10" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_11" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityRegistrantName_11" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_26" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityCentralIndexKey_26" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_25" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityEmergingGrowthCompany_25" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_13" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityFileNumber_13" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_12" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityIncorporationStateCountryCode_12" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber_14" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityTaxIdentificationNumber_14" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_15" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressAddressLine1_15" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="loc_dei_EntityAddressAddressLine2_33" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressAddressLine2_33" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_16" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressCityOrTown_16" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_17" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressStateOrProvince_17" use="optional" order="17" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_18" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressPostalZipCode_18" use="optional" order="18" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_19" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_CityAreaCode_19" use="optional" order="19" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_20" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_LocalPhoneNumber_20" use="optional" order="20" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications" xlink:label="loc_dei_WrittenCommunications_21" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_WrittenCommunications_21" use="optional" order="21" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:label="loc_dei_SolicitingMaterial_22" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_SolicitingMaterial_22" use="optional" order="22" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:label="loc_dei_PreCommencementTenderOffer_23" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_PreCommencementTenderOffer_23" use="optional" order="23" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_24" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_24" use="optional" order="24" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_28" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_Security12bTitle_28" use="optional" order="25" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_29" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_TradingSymbol_29" use="optional" order="26" preferredLabel="http://www.xbrl.org/2003/role/label" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_30" />
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_SecurityExchangeName_30" use="optional" order="27" preferredLabel="http://www.xbrl.org/2003/role/label" />
        </link:presentationLink>
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"  />
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"  />
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"  />
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"  />
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"  />
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll"  />
        <link:definitionLink xlink:type="extended" xlink:role="http://www.csgi.com/role/CoverPage" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_8" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_3" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_DocumentInformationTable_3" xbrldt:contextElement="segment" xbrldt:closed="true" use="optional" order="1" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_4" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_3" xlink:to="loc_dei_LegalEntityAxis_4" use="optional" order="2" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4" xlink:to="loc_dei_EntityDomain_5" use="optional" order="3" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_5_default" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4" xlink:to="loc_dei_EntityDomain_5_default" use="optional" order="4" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_9" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_DocumentType_9" use="optional" order="5" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_27" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_AmendmentFlag_27" use="optional" order="6" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_10" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_DocumentPeriodEndDate_10" use="optional" order="7" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_11" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityRegistrantName_11" use="optional" order="8" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_26" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityCentralIndexKey_26" use="optional" order="9" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_25" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityEmergingGrowthCompany_25" use="optional" order="10" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_13" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityFileNumber_13" use="optional" order="11" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_12" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityIncorporationStateCountryCode_12" use="optional" order="12" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber_14" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityTaxIdentificationNumber_14" use="optional" order="13" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_15" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressAddressLine1_15" use="optional" order="14" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="loc_dei_EntityAddressAddressLine2_33" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressAddressLine2_33" use="optional" order="15" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_16" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressCityOrTown_16" use="optional" order="16" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_17" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressStateOrProvince_17" use="optional" order="17" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_18" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_EntityAddressPostalZipCode_18" use="optional" order="18" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_19" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_CityAreaCode_19" use="optional" order="19" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_20" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_LocalPhoneNumber_20" use="optional" order="20" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications" xlink:label="loc_dei_WrittenCommunications_21" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_WrittenCommunications_21" use="optional" order="21" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:label="loc_dei_SolicitingMaterial_22" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_SolicitingMaterial_22" use="optional" order="22" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:label="loc_dei_PreCommencementTenderOffer_23" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_PreCommencementTenderOffer_23" use="optional" order="23" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_24" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_24" use="optional" order="24" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_28" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_Security12bTitle_28" use="optional" order="25" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_29" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_TradingSymbol_29" use="optional" order="26" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_30" />
          <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_8" xlink:to="loc_dei_SecurityExchangeName_30" use="optional" order="27" />
        </link:definitionLink>
        <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link" >
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:label="loc_dei_CoverAbstract" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CoverAbstract" xml:lang="en-US">Cover [Abstract]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentInformationTable" xml:lang="en-US">Document Information [Table]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationTable" xlink:to="lab_dei_DocumentInformationTable" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentInformationLineItems" xml:lang="en-US">Document Information [Line Items]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationLineItems" xlink:to="lab_dei_DocumentInformationLineItems" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityRegistrantName" xml:lang="en-US">Entity Registrant Name</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityTaxIdentificationNumber" xml:lang="en-US">Entity Tax Identification Number</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_LocalPhoneNumber" xml:lang="en-US">Local Phone Number</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="loc_dei_PreCommencementIssuerTenderOffer" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementIssuerTenderOffer" xlink:to="lab_dei_PreCommencementIssuerTenderOffer" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:label="loc_dei_PreCommencementTenderOffer" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_PreCommencementTenderOffer" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementTenderOffer" xlink:to="lab_dei_PreCommencementTenderOffer" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_Security12bTitle" xml:lang="en-US">Title of 12(b) Security</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_SecurityExchangeName" xml:lang="en-US">Security Exchange Name</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:label="loc_dei_SolicitingMaterial" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_SolicitingMaterial" xml:lang="en-US">Soliciting Material</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SolicitingMaterial" xlink:to="lab_dei_SolicitingMaterial" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_TradingSymbol" xml:lang="en-US">Trading Symbol</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications" xlink:label="loc_dei_WrittenCommunications" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_WrittenCommunications" xml:lang="en-US">Written Communications</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_WrittenCommunications" xlink:to="lab_dei_WrittenCommunications" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_AmendmentFlag" xml:lang="en-US">Amendment Flag</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CityAreaCode" xml:lang="en-US">City Area Code</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentPeriodEndDate" xml:lang="en-US">Document Period End Date</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentType" xml:lang="en-US">Document Type</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressAddressLine1" xml:lang="en-US">Entity Address, Address Line One</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="loc_dei_EntityAddressAddressLine2" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressAddressLine2" xml:lang="en-US">Entity Address, Address Line Two</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressCityOrTown" xml:lang="en-US">Entity Address, City or Town</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressPostalZipCode" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityAddressStateOrProvince" xml:lang="en-US">Entity Address, State or Province</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCentralIndexKey" xml:lang="en-US">Entity Central Index Key</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityEmergingGrowthCompany" xml:lang="en-US">Entity Emerging Growth Company</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityFileNumber" xml:lang="en-US">Entity File Number</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_LegalEntityAxis" xml:lang="en-US">Legal Entity [Axis]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" />
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityDomain" xml:lang="en-US">Entity [Domain]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" />
        </link:labelLink>
      </link:linkbase>
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/currency/2025" schemaLocation="https://xbrl.sec.gov/currency/2025/currency-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/exch/2025" schemaLocation="https://xbrl.sec.gov/exch/2025/exch-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/naics/2025" schemaLocation="https://xbrl.sec.gov/naics/2025/naics-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/sic/2025" schemaLocation="https://xbrl.sec.gov/sic/2025/sic-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/stpr/2025" schemaLocation="https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd" />
  <import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" />
  <import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd" />
  <import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd" />
  <import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <import namespace="http://xbrl.org/2020/extensible-enumerations-2.0" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
</schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>5
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.25.3</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover Page<br></strong></div></th>
<th class="th"><div>Oct. 29, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Oct. 29,  2025<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">CSG SYSTEMS INTERNATIONAL, INC.<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001005757<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">0-27512<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">47-0783182<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">169 Inverness Dr W<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine2', window );">Entity Address, Address Line Two</a></td>
<td class="text">Ste 300<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Englewood<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">CO<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">80112<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">303<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">200-2000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">true<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common Stock, par value $0.01 per share<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CSGS<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentInformationLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentInformationLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine2">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 2 such as Street or Suite number</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine2</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14a<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>6
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
.report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

.report table.authRefData a {
	display: block;
	font-weight: bold;
}

.report table.authRefData p {
	margin-top: 0px;
}

.report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

.report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

.report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

.report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
.pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
.report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

.report hr {
	border: 1px solid #acf;
}

/* Top labels */
.report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

.report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

.report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

.report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

.report td.pl div.a {
	width: 200px;
}

.report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
.report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
.report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
.report .re, .report .reu {
	background-color: #def;
}

.report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
.report .ro, .report .rou {
	background-color: white;
}

.report .rou td {
	border-bottom: 1px solid black;
}

.report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
.report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
.report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

.report .nump {
	padding-left: 2em;
}

.report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
.report .text {
	text-align: left;
	white-space: normal;
}

.report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

.report .text .more {
	display: none;
}

.report .text .note {
	font-style: italic;
	font-weight: bold;
}

.report .text .small {
	width: 10em;
}

.report sup {
	font-style: italic;
}

.report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>23</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="d939238d8k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.csgi.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>csgs-20251029.xsd</File>
    <File doctype="8-K" isOnlyDei="true" isUsgaap="true" original="d939238d8k.htm">d939238d8k.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="23">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>12
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "d939238d8k.htm": {
   "nsprefix": "csgs",
   "nsuri": "http://www.csgi.com/20251029",
   "dts": {
    "schema": {
     "local": [
      "csgs-20251029.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://www.xbrl.org/dtr/type/2024-01-31/types.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd",
      "https://xbrl.sec.gov/country/2025/country-2025.xsd",
      "https://xbrl.sec.gov/currency/2025/currency-2025.xsd",
      "https://xbrl.sec.gov/dei/2025/dei-2025.xsd",
      "https://xbrl.sec.gov/exch/2025/exch-2025.xsd",
      "https://xbrl.sec.gov/naics/2025/naics-2025.xsd",
      "https://xbrl.sec.gov/sic/2025/sic-2025.xsd",
      "https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd"
     ]
    },
    "inline": {
     "local": [
      "d939238d8k.htm"
     ]
    }
   },
   "keyStandard": 23,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 3,
    "http://xbrl.sec.gov/dei/2025": 3
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 28,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2025": 23
   },
   "report": {
    "R1": {
     "role": "http://www.csgi.com/role/CoverPage",
     "longName": "1001 - Document - Cover Page",
     "shortName": "Cover Page",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "P10_29_2025To10_29_2025",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "div",
       "div",
       "div",
       "div",
       "div",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d939238d8k.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "P10_29_2025To10_29_2025",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "div",
       "div",
       "div",
       "div",
       "div",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d939238d8k.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CityAreaCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CityAreaCode",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "City Area Code",
        "documentation": "Area code of city"
       }
      }
     },
     "auth_ref": []
    },
    "dei_CoverAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentInformationLineItems": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentInformationLineItems",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Information [Line Items]",
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentInformationTable": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentInformationTable",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Information [Table]",
        "documentation": "Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentType",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine1": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine2": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressAddressLine2",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line Two",
        "documentation": "Address Line 2 such as Street or Suite number"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, City or Town",
        "documentation": "Name of the City or Town"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressPostalZipCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Postal Zip Code",
        "documentation": "Code for the postal or zip code"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressStateOrProvince": {
     "xbrltype": "stateOrProvinceItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressStateOrProvince",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, State or Province",
        "documentation": "Name of the state or province."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityDomain": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityDomain",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity [Domain]",
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Emerging Growth Company",
        "documentation": "Indicate if registrant meets the emerging growth company criteria."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityFileNumber": {
     "xbrltype": "fileNumberItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity File Number",
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityIncorporationStateCountryCode": {
     "xbrltype": "edgarStateCountryItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Incorporation, State or Country Code",
        "documentation": "Two-character EDGAR code representing the state or country of incorporation."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityTaxIdentificationNumber": {
     "xbrltype": "employerIdItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Tax Identification Number",
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_LegalEntityAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "LegalEntityAxis",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Legal Entity [Axis]",
        "documentation": "The set of legal entities associated with a report."
       }
      }
     },
     "auth_ref": []
    },
    "dei_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Local Phone Number",
        "documentation": "Local phone number for entity."
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre-commencement Issuer Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "dei_PreCommencementTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre-commencement Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "Security12bTitle",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Title of 12(b) Security",
        "documentation": "Title of a 12(b) registered security."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_SecurityExchangeName": {
     "xbrltype": "edgarExchangeCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Exchange Name",
        "documentation": "Name of the Exchange on which a security is registered."
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "dei_SolicitingMaterial": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Soliciting Material",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "TradingSymbol",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Trading Symbol",
        "documentation": "Trading symbol of an instrument as listed on an exchange."
       }
      }
     },
     "auth_ref": []
    },
    "dei_WrittenCommunications": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://www.csgi.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Written Communications",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act."
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14a",
   "Subsection": "12"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>13
<FILENAME>0001193125-25-254538-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001193125-25-254538-xbrl.zip
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M(?GL13#9>#X\FY2J\Y-UP&MAI=@S9T[="2$SZV.,HP]PY6U#<C;Y8^N%P2J
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M',T&F#-CYC@U<TZG:4GO_@]02P,$%     @ US!=6[)TO$L)&P  49(   X
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MFF]Y]@-,*R9FD?D",57>#"?+V-0:A/A7PN%SKM;3A6D)J@3V#OP2"\OVUM\
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M4Z/0N0 ?O%%B)GWH!^+'70L3ZMRBZYZP,=YR97-E^WK_U-X:F1T?\3@R2PM
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M;"OB:6AP@CW'63)OCAZM'PY %4BNJ"K)3'*474HO'"2+2%M8"G:+$/H2J,
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MV6)Q?EXKCP,8[.\4-=Z1R]W5+O<.01U:(OX7(U&M>O)H%&IY\!0B+@@**>F
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M,SDR,SAD.&LN:'1M4$L! A0#%     @ US!=6Q\^6*:@%   [D@  !$
M         ( !2"@  &0Y,SDR,SAD97@Y.3$N:'1M4$L%!@     #  , N@
' !<]      $!

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>d939238d8k_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="csgs-20251029.xsd" xlink:type="simple"/>
    <context id="P10_29_2025To10_29_2025">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001005757</identifier>
        </entity>
        <period>
            <startDate>2025-10-29</startDate>
            <endDate>2025-10-29</endDate>
        </period>
    </context>
    <dei:AmendmentFlag contextRef="P10_29_2025To10_29_2025" id="ixv-295">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="P10_29_2025To10_29_2025" id="ixv-296">0001005757</dei:EntityCentralIndexKey>
    <dei:EntityAddressStateOrProvince contextRef="P10_29_2025To10_29_2025" id="hidden148550385">CO</dei:EntityAddressStateOrProvince>
    <dei:DocumentType contextRef="P10_29_2025To10_29_2025" id="ixv-307">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="P10_29_2025To10_29_2025" id="ixv-308">2025-10-29</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="P10_29_2025To10_29_2025" id="ixv-309">CSG SYSTEMS INTERNATIONAL, INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="P10_29_2025To10_29_2025" id="ixv-310">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="P10_29_2025To10_29_2025" id="ixv-311">0-27512</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="P10_29_2025To10_29_2025" id="ixv-312">47-0783182</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="P10_29_2025To10_29_2025" id="ixv-313">169 Inverness Dr W</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="P10_29_2025To10_29_2025" id="ixv-314">Ste 300</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="P10_29_2025To10_29_2025" id="ixv-315">Englewood</dei:EntityAddressCityOrTown>
    <dei:EntityAddressPostalZipCode contextRef="P10_29_2025To10_29_2025" id="ixv-316">80112</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="P10_29_2025To10_29_2025" id="ixv-317">303</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="P10_29_2025To10_29_2025" id="ixv-318">200-2000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="P10_29_2025To10_29_2025" id="ixv-319">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="P10_29_2025To10_29_2025" id="ixv-320">true</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="P10_29_2025To10_29_2025" id="ixv-321">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="P10_29_2025To10_29_2025" id="ixv-322">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="P10_29_2025To10_29_2025" id="ixv-323">Common Stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="P10_29_2025To10_29_2025" id="ixv-324">CSGS</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="P10_29_2025To10_29_2025" id="ixv-325">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="P10_29_2025To10_29_2025" id="ixv-326">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
