<SEC-DOCUMENT>0000950170-24-045151.txt : 20240417
<SEC-HEADER>0000950170-24-045151.hdr.sgml : 20240417
<ACCEPTANCE-DATETIME>20240417164349
ACCESSION NUMBER:		0000950170-24-045151
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20240411
ITEM INFORMATION:		Cost Associated with Exit or Disposal Activities
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20240417
DATE AS OF CHANGE:		20240417

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADTRAN Holdings, Inc.
		CENTRAL INDEX KEY:			0000926282
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				872164282
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41446
		FILM NUMBER:		24851657

	BUSINESS ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806
		BUSINESS PHONE:		256-963-8220

	MAIL ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADTRAN INC
		DATE OF NAME CHANGE:	19940705
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>adtn-20240411.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<!-- DFIN New ActiveDisclosure (SM) Inline XBRL Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2024-04-17T16:42:08.4351+00:00 -->
<!-- Copyright (c) 2024 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:nonNumeric="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:adtn="http://www.adtran.com/20240411" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2022-02-16">
 <head>
  <title>8-K</title>
  <meta http-equiv="Content-Type" content="text/html"/>
 </head>
 <body style="margin: auto!important;padding: 8px;">
  <div style="display:none;"><ix:header><ix:hidden><ix:nonNumeric id="F_160bf815-f4d8-40d7-9e97-772a19148c97" name="dei:AmendmentFlag" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb">false</ix:nonNumeric><ix:nonNumeric id="F_9a9e65f8-a453-422e-a200-cee395ec5137" name="dei:EntityCentralIndexKey" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb">0000926282</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:type="simple" xlink:href="adtn-20240411.xsd"/></ix:references><ix:resources><xbrli:context id="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0000926282</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2024-04-11</xbrli:startDate><xbrli:endDate>2024-04-11</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div>
  <div style="min-height:0.5in;"></div>
  <p style="border-top:2.25pt double #000000;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:5.75pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">UNITED STATES<br/>SECURITIES AND EXCHANGE COMMISSION<br/></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">WASHINGTON, D.C. 20549</span></p>
  <p style="margin-left:40%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:0.75pt solid #000000;margin-right:40%;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">FORM </span><span style="font-size:18pt;font-family:Times New Roman;"><ix:nonNumeric id="F_ad3936d3-220a-4475-bf3e-1ab12cc9b084" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:DocumentType"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:18pt;font-family:Times New Roman;min-width:fit-content;">8-K</span></ix:nonNumeric></span></p>
  <p style="margin-left:40%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:0.75pt solid #000000;margin-right:40%;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">CURRENT REPORT</span></p>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:6pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:100%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;margin-right:0.02986111111111111in;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Date of Report (Date of earliest event reported): </span><span><ix:nonNumeric id="F_bfcf7986-b3b0-45eb-8c23-15b9a688a15d" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:DocumentPeriodEndDate" format="ixt:date-monthname-day-year-en"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">April 11, 2024</span></ix:nonNumeric></span></p></td>
   </tr>
  </table>
  <p style="margin-left:40%;font-size:10pt;margin-top:5pt;font-family:Times New Roman;margin-bottom:0;border-bottom:0.75pt solid #000000;margin-right:40%;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:5pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="font-size:24pt;font-family:Times New Roman;"><ix:nonNumeric id="F_04adda62-5c1a-47ec-b306-66d7b950e03a" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityRegistrantName"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:24pt;font-family:Times New Roman;min-width:fit-content;">ADTRAN Holdings, Inc.</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:3pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;min-width:fit-content;">(Exact name of Registrant as Specified in Its Charter)</span></p>
  <p style="margin-left:40%;font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;border-bottom:0.75pt solid #000000;margin-right:40%;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:20%;"/>
    <td style="width:1%;"/>
    <td style="width:20%;"/>
    <td style="width:18%;"/>
    <td style="width:41%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td colspan="3" style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_46a7b411-bb60-4a9b-a220-bf7504ac613d" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityIncorporationStateCountryCode" format="ixt-sec:stateprovnameen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Delaware</span></ix:nonNumeric></span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_fe920c11-b6cd-4758-831a-30af4ce8af98" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityFileNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">001-41446</span></ix:nonNumeric></span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_40d91bcc-bdc1-4e6b-af13-2d8a20528a1e" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityTaxIdentificationNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">87-2164282</span></ix:nonNumeric></span></p></td>
   </tr>
   <tr style="height:7pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td colspan="3" style="padding-top:0.01in;vertical-align:top;"><p style="font-size:7.5pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">(State or Other Jurisdiction<br/>of Incorporation)</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:7.5pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">(Commission File Number)</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:7.5pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">(IRS Employer<br/>Identification No.)</span></p></td>
   </tr>
   <tr style="word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td colspan="3" style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_686e4c33-2819-45e9-a8a3-87bc9d32b7db" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityAddressAddressLine1"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">901 Explorer Boulevard</span></ix:nonNumeric></span></p></td>
    <td colspan="2" style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td colspan="3" style="padding-top:0.01in;vertical-align:top;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_ffc319ed-67ae-4893-827a-1f7790cd06f1" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityAddressCityOrTown"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Huntsville</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">, </span><span><ix:nonNumeric id="F_7fc33d09-232a-4170-859c-16ac21b25095" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityAddressStateOrProvince" format="ixt-sec:stateprovnameen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Alabama</span></ix:nonNumeric></span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_5fb51f51-6b49-4726-b731-41973c254f5f" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityAddressPostalZipCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">35806-2807</span></ix:nonNumeric></span></p></td>
   </tr>
   <tr style="height:7pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td colspan="3" style="padding-top:0.01in;vertical-align:top;"><p style="font-size:7.5pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">(Address of Principal Executive Offices)</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:7.5pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">(Zip Code)</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:100%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td style="padding-top:0.125in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;margin-right:0.02986111111111111in;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Registrant&#8217;s Telephone Number, Including Area Code:</span><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span><span><ix:nonNumeric id="F_98ff8b71-8456-47ab-8bc7-5570b05e9d0c" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:CityAreaCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">256</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span><span><ix:nonNumeric id="F_f627d7cc-3a78-4d57-8a18-cd999dfb7ef6" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:LocalPhoneNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">963-8000</span></ix:nonNumeric></span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:100%;"/>
   </tr>
   <tr style="word-break:break-word;white-space:pre-wrap;text-align:left;">
    <td style="padding-top:0.125in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:7.5pt;font-family:Times New Roman;min-width:fit-content;">(Former Name or Former Address, if Changed Since Last Report)</span></p>
  <p style="margin-left:40%;font-size:10pt;margin-top:9.35pt;font-family:Times New Roman;margin-bottom:0;border-bottom:0.75pt solid #000000;margin-right:40%;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:9.35pt;font-family:Times New Roman;margin-bottom:6pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:9pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_80ea0b71-a064-451f-9c93-fbe960c9ce98" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:WrittenCommunications" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</span></div>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_3e06d295-11b3-4807-ade1-068810afb73b" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:SolicitingMaterial" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</span></div>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_6ecae803-93ea-44e2-a0ab-9f4b4f3fcdd0" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:PreCommencementTenderOffer" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</span></div>
  <div style="text-indent:-24.5pt;padding-left:24.5pt;margin-top:6pt;margin-bottom:0;text-align:left;"><span style="margin-right:1em;margin-right:1em;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_da4bedd9-0ddf-4f58-b3db-c3db648b0eba" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></div>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:9pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Securities registered pursuant to Section 12(b) of the Act:</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:38%;"/>
    <td style="width:1%;"/>
    <td style="width:15%;"/>
    <td style="width:1%;"/>
    <td style="width:45%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"><br/>Title of each class</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid #ffffff03;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Trading<br/>Symbol(s)</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid #ffffff03;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"><br/>Name of each exchange on which registered</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_5bdf12b4-f715-4af8-a6cb-05f5e9284532" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:Security12bTitle"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Common Stock, Par Value $0.01 per share</span></ix:nonNumeric></span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_2d387678-d434-457d-b7f5-d897cd09b053" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:TradingSymbol"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">ADTN</span></ix:nonNumeric></span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_df62e81a-d02f-4499-8e78-dfbc0161a090" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Nasdaq Global Select Market</span></ix:nonNumeric></span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;&#8239;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;&#8239;240.12b-2 of this chapter).</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Emerging growth company </span><span style="font-size:10pt;"><ix:nonNumeric id="F_265e487a-8f6f-485b-9525-d6cb395b1d8b" contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb" name="dei:EntityEmergingGrowthCompany" format="ixt-sec:boolballotbox"><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 13(a) of the Exchange Act. </span><span style="font-size:10pt;font-family:Times New Roman;">&#9744;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:2.25pt double #000000;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div style="flex-direction:column;display:flex;min-height:0.5in;justify-content:flex-end;"></div>
  <hr style="page-break-after:always;"/>
  <div style="min-height:0.5in;"></div>
  <p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:6pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 2.05 Costs Associated with Exit or Disposal Activities.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">As ADTRAN Holdings, Inc. (the &#8220;Company&#8221;) previously reported in its Quarterly Report on Form 10-Q for the quarter ended September 30, 2023 (as amended) and Annual Report on Form 10-K for the year ended December 31, 2023, on November 6, 2023, the Company&#8217;s management resolved to implement a comprehensive business efficiency program (the &#8220;Business Efficiency Program&#8221;) which includes site consolidations. In connection with the Business Efficiency Program, management of the Company determined on April 11, 2024 to close the Company&#8217;s facility in Greifswald, Germany (the &#8220;Facility&#8221;), within the next three months.</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The Company currently expects to incur total costs ranging from approximately $13.5 million to $18.4 million in connection with the closure of the facility. This includes cash charges ranging between approximately $13.3 million and $17.6 million in severance, outplacement and related expenses and a range of approximately $0.7 million to $1.3 million in lease exit costs, as well as non-cash charges of approximately $0.2 million in accelerated depreciation expenses.</span><span style="color:#000000;white-space:pre-wrap;font-size:8pt;font-family:Times New Roman;min-width:fit-content;"> </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The Company expects these charges to be fully incurred in fiscal year 2024 with cash payments expected to span into 2025. The total estimated costs of the Business Efficiency Program are being adjusted accordingly.</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The Company does not currently anticipate incurring other charges or cash expenditures associated with the closure of the Facility. However, the Company will amend this disclosure in the event that there is a material change in costs or cash payments in connection with the closure of the Facility.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The closure of the Facility will be substantially completed by June 30, 2024.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Forward-Looking Statements</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">This Current Report on Form 8-K contains forward-looking statements that are based on our management&#8217;s beliefs and assumptions and on information currently available to our management. Forward-looking statements include, among other things, statements regarding the Company&#8217;s estimated costs with respect to the closure of the Facility, the timing of the closure, and related matters.  Forward-looking statements include statements that are not historical facts and can be identified by terms such as &#8220;anticipate,&#8221; &#8220;believe,&#8221; &#8220;could,&#8221; &#8220;estimate,&#8221; &#8220;expect,&#8221; &#8220;intend,&#8221; &#8220;may,&#8221; &#8220;plan,&#8221; &#8220;potential,&#8221; &#8220;predict,&#8221; &#8220;project,&#8221; &#8220;seek,&#8221; &#8220;should,&#8221; &#8220;will,&#8221; &#8220;would&#8221; or similar expressions and the negatives of those terms.  Our actual results and the timing of events could materially differ from those anticipated in such forward-looking statements as a result of certain risks and uncertainties, including risks relating to the time necessary to cease operations at the Facility, the outcome of discussions with the union representing the employees at the Facility, the timing, effectiveness and expense associated with transferring production capabilities to other locations, ongoing restructuring of our operations under our Business Efficiency Program more generally, our ability to achieve the anticipated cost savings associated with such program, as well as fluctuations in revenue and its impact on our operating results, our ability to manage our inventory, our ability to meet our debt service obligations, and the risks described in more detail in the Company&#8217;s most recent Annual Report on Form 10-K and Quarterly Reports on Form 10-Q, as amended, and other documents on file with the SEC.  The Company disclaims and does not undertake any obligation to update or revise any forward-looking statement in this filing, except as required by applicable law or regulation.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 9.01 Financial Statements and Exhibits.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:89.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:20.2%;"/>
    <td style="width:79.8%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-left:0.08in;vertical-align:top;padding-right:0.08in;text-align:right;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;text-decoration:underline;min-width:fit-content;">Exhibit Number</span></p></td>
    <td style="padding-left:0.08in;vertical-align:top;padding-right:0.08in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;text-decoration:underline;min-width:fit-content;">Description</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-left:0.08in;vertical-align:top;padding-right:0.08in;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">104</span></p></td>
    <td style="padding-left:0.08in;vertical-align:top;padding-right:0.08in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Cover Page Interactive Data File &#8211; the cover page iXBRL tags are embedded within the Inline XBRL document</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div style="flex-direction:column;display:flex;min-height:0.5in;justify-content:flex-end;"></div>
  <hr style="page-break-after:always;"/>
  <div style="min-height:0.5in;"></div>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:9.35pt;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">SIGNATURES</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:9.35pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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.</span></p>
  <table style="border-spacing:0;table-layout:fixed;width:100.0%;border-collapse:separate;">
   <tr style="visibility:collapse;">
    <td style="width:6%;"/>
    <td style="width:44%;"/>
    <td style="width:4%;"/>
    <td style="width:46%;"/>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:4.3pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">ADTRAN Holdings, Inc.</span></p></td>
   </tr>
   <tr style="word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Date:</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">April 17, 2024</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</span><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;border-bottom:0.25pt solid;"><p style="font-size:10pt;margin-top:4.3pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ Ulrich Dopfer</span></p></td>
   </tr>
   <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;">
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;"><p style="font-size:10pt;margin-top:0.7pt;font-family:Times New Roman;margin-bottom:9.35pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Ulrich Dopfer<br/>Chief Financial Officer</span></p></td>
   </tr>
  </table>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div style="flex-direction:column;display:flex;min-height:0.5in;justify-content:flex-end;"></div>
  <hr style="page-break-after:always;"/>
 </body>
</html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>2
<FILENAME>adtn-20240411.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2024-04-17T16:42:08.9675+00:00 -->
<!-- Copyright (c) 2024 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema targetNamespace="http://www.adtran.com/20240411" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:adtn="http://www.adtran.com/20240411" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:us-gaap="http://fasb.org/us-gaap/2023" xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" namespace="http://xbrl.sec.gov/dei/2023"/>
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd" namespace="http://fasb.org/us-gaap/2023"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbase id="lnk">
        <link:roleRef roleURI="http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="adtn-20240411.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple"/>
        <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:title="labelLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="dei_PreCommencementIssuerTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:label="dei_PreCommencementTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:label="dei_WrittenCommunications"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Issuer Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-commencement Tender Offer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SolicitingMaterial_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_WrittenCommunications_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl"/>
        </link:labelLink>
        <link:presentationLink xlink:role="http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="dei_PreCommencementIssuerTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:label="dei_PreCommencementTenderOffer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:label="dei_WrittenCommunications"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="10010.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="10130.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="10020.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="10000.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="10090.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="10100.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="10120.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince" order="10110.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="10040.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="10050.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="10060.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="10070.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="10030.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="10080.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="10140.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="10190.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="10180.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="10210.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="10340.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="10170.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="10220.0" priority="2" use="optional"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_WrittenCommunications" order="10160.0" priority="2" use="optional"/>
        </link:presentationLink>
      </link:linkbase>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>4
<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;">v3.24.1.u1</span><table class="report" border="0" cellspacing="2" id="idm140584964554048">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document And Entity Information<br></strong></div></th>
<th class="th"><div>Apr. 11, 2024</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_CoverAbstract', window );"><strong>Cover [Abstract]</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">Apr. 11,  2024<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">ADTRAN Holdings, 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">0000926282<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">001-41446<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">87-2164282<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">901 Explorer Boulevard<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_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Huntsville<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_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">AL<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_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">35806-2807<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_CityAreaCode', window );">City Area Code</a></td>
<td class="text">256<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_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">963-8000<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_WrittenCommunications', window );">Written Communications</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_SolicitingMaterial', window );">Soliciting Material</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_PreCommencementTenderOffer', window );">Pre-commencement 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_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer 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_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="ro">
<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">ADTN<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_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_CoverAbstract">
<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>Cover page.</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_CoverAbstract</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_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> -Section 14a<br> -Number 240<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>EXCEL
<SEQUENCE>5
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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MZ_#VQ*J\? 6=*PLOM.7ABC.H-S< OE\H9=]/W%MM]:/$\!]02P,$%     @
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MX-R#8._AE8P=S8\?=_<#4$L#!!0    ( 'B%D5@D'INBK0   /@!   :
M>&PO7W)E;',O=V]R:V)O;VLN>&UL+G)E;'.UD3T.@S ,A:\2Y0 U4*E#!4Q=
M6"LN$ 7S(Q(2Q:X*MR^% 9 Z=&&RGBU_[\E.GV@4=VZ@MO,D1FL&RF3+[.\
MI%NTBB[.XS!/:A>LXEF&!KS2O6H0DBBZ0=@S9)[NF:*<//Y#='7=:7PX_;(X
M\ \PO%WHJ45D*4H5&N1,PFBV-L%2XLM,EJ*H,AF**I9P6B#BR2!M:59]L$].
MM.=Y%S?W1:[-XPFNWPQP>'3^ 5!+ P04    " !XA9%899!YDAD!  #/ P
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M<' N>&UL4$L! A0#%     @ >(616)@:F37N    *P(  !$
M ( !KP   &1O8U!R;W!S+V-O<F4N>&UL4$L! A0#%     @ >(616)E<G",0
M!@  G"<  !,              ( !S $  'AL+W1H96UE+W1H96UE,2YX;6Q0
M2P$"% ,4    " !XA9%8_AQC@UL$  "@$   &               @($-"
M>&PO=V]R:W-H965T<R]S:&5E=#$N>&UL4$L! A0#%     @ >(616)^@&_"Q
M @  X@P   T              ( !G@P  'AL+W-T>6QE<RYX;6Q02P$"% ,4
M    " !XA9%8EXJ[',     3 @  "P              @ %Z#P  7W)E;',O
M+G)E;'-02P$"% ,4    " !XA9%8.JJBYT !   \ @  #P
M@ %C$   >&PO=V]R:V)O;VLN>&UL4$L! A0#%     @ >(616"0>FZ*M
M^ $  !H              ( !T!$  'AL+U]R96QS+W=O<FMB;V]K+GAM;"YR
M96QS4$L! A0#%     @ >(616&60>9(9 0  SP,  !,              ( !
MM1(  %M#;VYT96YT7U1Y<&5S72YX;6Q02P4&      D "0 ^ @  _Q,

end
</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>3.24.1.u1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>22</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="adtn-20240411.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</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 doctype="8-K" isOnlyDei="true" isUsgaap="true" original="adtn-20240411.htm">adtn-20240411.htm</File>
    <File>adtn-20240411.xsd</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="22">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>11
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "adtn-20240411.htm": {
   "nsprefix": "adtn",
   "nsuri": "http://www.adtran.com/20240411",
   "dts": {
    "inline": {
     "local": [
      "adtn-20240411.htm"
     ]
    },
    "schema": {
     "local": [
      "adtn-20240411.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",
      "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/2022-03-31/types.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-roles-2023.xsd",
      "https://xbrl.fasb.org/srt/2023/elts/srt-types-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd",
      "https://xbrl.fasb.org/us-gaap/2023/elts/us-types-2023.xsd",
      "https://xbrl.sec.gov/country/2023/country-2023.xsd",
      "https://xbrl.sec.gov/dei/2023/dei-2023.xsd"
     ]
    }
   },
   "keyStandard": 22,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 2,
    "http://xbrl.sec.gov/dei/2023": 2
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 23,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2023": 22
   },
   "report": {
    "R1": {
     "role": "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation",
     "longName": "100000 - Document - Document And Entity Information",
     "shortName": "Document And Entity Information",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "adtn-20240411.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "adtn-20240411.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "CityAreaCode",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "DocumentType",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityAddressStateOrProvince",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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": [
      "r4"
     ]
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "Security12bTitle",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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": [
      "r5"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "TradingSymbol",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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/2023",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://www.adtran.com/20240411/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "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": "14d",
   "Subsection": "2b"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Section": "14a",
   "Number": "240",
   "Subsection": "12"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>12
<FILENAME>0000950170-24-045151-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0000950170-24-045151-xbrl.zip
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M3W8/CHEE&QVH.!'Y"^Z%N ?Q>L^">&UA>-P*76J:D4V=P/ IX\*DAA<$IL'
M]+<?O(%Z AHL!KQG9Y] 9(+<3%\NY4YP008-,JZ2K>DP:EI3E#MSJG5,MPZ8
MK;KFRR1=3\1,!(9-0Z1%QQ$62& 6T3!Q(B>QDYASXZ&D^T4)E+EX"8^^6 #U
MN/J<)."^OE@2!IS0> HI-TIAT^'4>A.]O1U!UW5?)DESYD2"\Y :G"?42=R
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M)2<[65;!"EWM]+=QIWAK<M/CGHB;#NL;CNU-HB^Q.:]+O;80FTT!IT]7 +:
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MZ/D:C4,8D'TDD) 91SD ;=&I46ABI*.7+>!? 5T9A_!<%-HOGXA\<)0EWCP
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M[?:E2*;V=.MW\:X5':^AY6\?6M[N1CD?O?_+=K=?#M+W_P]02P,$%     @
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MK4:_J:OE?E0WNI'ZZ=WP3OA#P!?_ U!+ 0(4 Q0    ( 'B%D5B1A_B4^Q8
M !"H   1              "  0    !A9'1N+3(P,C0P-#$Q+FAT;5!+ 0(4
M Q0    ( 'B%D5CW-D'@80@  $1=   1              "  2H7  !A9'1N
C+3(P,C0P-#$Q+GAS9%!+!08      @ " 'X   "Z'P     !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>adtn-20240411_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/2023"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="adtn-20240411.xsd" xlink:type="simple"/>
    <context id="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000926282</identifier>
        </entity>
        <period>
            <startDate>2024-04-11</startDate>
            <endDate>2024-04-11</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_160bf815-f4d8-40d7-9e97-772a19148c97">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_9a9e65f8-a453-422e-a200-cee395ec5137">0000926282</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_ad3936d3-220a-4475-bf3e-1ab12cc9b084">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_bfcf7986-b3b0-45eb-8c23-15b9a688a15d">2024-04-11</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_04adda62-5c1a-47ec-b306-66d7b950e03a">ADTRAN Holdings, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_46a7b411-bb60-4a9b-a220-bf7504ac613d">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_fe920c11-b6cd-4758-831a-30af4ce8af98">001-41446</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_40d91bcc-bdc1-4e6b-af13-2d8a20528a1e">87-2164282</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_686e4c33-2819-45e9-a8a3-87bc9d32b7db">901 Explorer Boulevard</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_ffc319ed-67ae-4893-827a-1f7790cd06f1">Huntsville</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_7fc33d09-232a-4170-859c-16ac21b25095">AL</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_5fb51f51-6b49-4726-b731-41973c254f5f">35806-2807</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_98ff8b71-8456-47ab-8bc7-5570b05e9d0c">256</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_f627d7cc-3a78-4d57-8a18-cd999dfb7ef6">963-8000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_80ea0b71-a064-451f-9c93-fbe960c9ce98">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_3e06d295-11b3-4807-ade1-068810afb73b">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_6ecae803-93ea-44e2-a0ab-9f4b4f3fcdd0">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_da4bedd9-0ddf-4f58-b3db-c3db648b0eba">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_5bdf12b4-f715-4af8-a6cb-05f5e9284532">Common Stock, Par Value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_2d387678-d434-457d-b7f5-d897cd09b053">ADTN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_df62e81a-d02f-4499-8e78-dfbc0161a090">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_d9ac43ea-8bc8-4a61-92ae-aa71fafe89eb"
      id="F_265e487a-8f6f-485b-9525-d6cb395b1d8b">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
