<SEC-DOCUMENT>0001193125-24-242955.txt : 20241024
<SEC-HEADER>0001193125-24-242955.hdr.sgml : 20241024
<ACCEPTANCE-DATETIME>20241024170528
ACCESSION NUMBER:		0001193125-24-242955
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20241024
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20241024
DATE AS OF CHANGE:		20241024

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEWMARKET CORP
		CENTRAL INDEX KEY:			0001282637
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32190
		FILM NUMBER:		241393396

	BUSINESS ADDRESS:	
		STREET 1:		330 S FOURTH ST
		STREET 2:		PO BOX 2189
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23218-2189
		BUSINESS PHONE:		804-788-5000

	MAIL ADDRESS:	
		STREET 1:		330 S FOURTH ST
		STREET 2:		PO BOX 2189
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23218-2189
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d874832d8k.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<html xmlns:dei="http://xbrl.sec.gov/dei/2023" xmlns:us-types="http://fasb.org/us-types/2023" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:neu="http://www.newmarket.com/20241024" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>8-K</title>
<meta http-equiv="Content-Type" content="text/html"/>
</head>
   <body><div style="display:none"> <ix:header> <ix:hidden> <ix:nonNumeric id="Hidden_dei_EntityRegistrantName" name="dei:EntityRegistrantName" contextRef="duration_2024-10-24_to_2024-10-24">NEWMARKET CORP</ix:nonNumeric> <ix:nonNumeric name="dei:AmendmentFlag" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-237">false</ix:nonNumeric> <ix:nonNumeric id="Hidden_dei_EntityCentralIndexKey" name="dei:EntityCentralIndexKey" contextRef="duration_2024-10-24_to_2024-10-24">0001282637</ix:nonNumeric> </ix:hidden> <ix:references> <link:schemaRef xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xlink:type="simple" xlink:href="neu-20241024.xsd" xlink:arcrole="http://www.xbrl.org/2003/linkbase"/> </ix:references> <ix:resources> <xbrli:context id="duration_2024-10-24_to_2024-10-24"> <xbrli:entity> <xbrli:identifier scheme="http://www.sec.gov/CIK">0001282637</xbrli:identifier> </xbrli:entity> <xbrli:period> <xbrli:startDate>2024-10-24</xbrli:startDate> <xbrli:endDate>2024-10-24</xbrli:endDate> </xbrli:period> </xbrli:context> </ix:resources> </ix:header> </div> <div style="text-align:center"> <div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"> <p style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</p> <p style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</p> <p style="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">UNITED STATES</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">SECURITIES AND EXCHANGE COMMISSION</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Washington, D.C. 20549</p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:10pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">FORM <span style="white-space:nowrap"><ix:nonNumeric name="dei:DocumentType" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-248">8-K</ix:nonNumeric></span></p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:10pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">CURRENT REPORT</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Pursuant to Section&#160;13 or 15(d)</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">of The Securities Exchange Act of 1934</p> <p style="margin-top:10pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Date of Report (Date of earliest event reported): <ix:nonNumeric name="dei:DocumentPeriodEndDate" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt:datemonthdayyearen" id="ixv-249">October&#160;24, 2024</ix:nonNumeric></p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:10pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman;font-weight:bold;text-align:center"> <span style=" -sec-ix-hidden:Hidden_dei_EntityRegistrantName">NEWMARKET CORPORATION</span> </p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Exact name of registrant as specified in its charter)</p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="border-collapse:collapse; font-family:Times New Roman; font-size:8pt;width:100%;border:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style=" text-align: center;margin:auto; vertical-align:top"><span style="font-weight:bold"><ix:nonNumeric name="dei:EntityIncorporationStateCountryCode" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:stateprovnameen" id="ixv-250">Virginia</ix:nonNumeric></span></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><span style="font-weight:bold"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityFileNumber" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-251">1-32190</ix:nonNumeric></span></span></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><span style="font-weight:bold"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityTaxIdentificationNumber" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-252">20-0812170</ix:nonNumeric></span></span></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style=" text-align: center;margin:auto; vertical-align:top"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(State or other jurisdiction</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">of incorporation)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Commission</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">File Number)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(IRS Employer</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Identification No.)</p></td></tr>
<tr style="font-size:1pt">
<td style="height:9.75pt"/>
<td style="height:9.75pt" colspan="2"/>
<td style="height:9.75pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style=" text-align: center;margin:auto; vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressAddressLine1" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-253">330 South Fourth Street</ix:nonNumeric>,</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressCityOrTown" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-254">Richmond</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressStateOrProvince" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:stateprovnameen" id="ixv-255">Virginia</ix:nonNumeric></p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:bottom"><span style="font-weight:bold"><ix:nonNumeric name="dei:EntityAddressPostalZipCode" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-256">23219</ix:nonNumeric></span></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style=" text-align: center;margin:auto; vertical-align:top"><span style="font-weight:bold">(Address of principal executive offices)</span></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top"/>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><span style="font-weight:bold">(Zip Code)</span></td></tr></table> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">Registrant&#8217;s telephone number, including area code: <ix:nonNumeric name="dei:CityAreaCode" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-257">(804)</ix:nonNumeric> <span style="white-space:nowrap"><ix:nonNumeric name="dei:LocalPhoneNumber" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-258">788-5000</ix:nonNumeric></span></p> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">Not applicable</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Former name or former address, if changed since last report.)</p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <p style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</p></div> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box below if the Form <span style="white-space:nowrap">8-K</span> filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</p> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%">&#160;</td>
<td style="width:5%;vertical-align:top"><ix:nonNumeric name="dei:WrittenCommunications" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:boolballotbox" id="ixv-259">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%">&#160;</td>
<td style="width:5%;vertical-align:top"><ix:nonNumeric name="dei:SolicitingMaterial" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:boolballotbox" id="ixv-260">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Soliciting material pursuant to Rule <span style="white-space:nowrap">14a-12</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14a-12)</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%">&#160;</td>
<td style="width:5%;vertical-align:top"><ix:nonNumeric name="dei:PreCommencementTenderOffer" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:boolballotbox" id="ixv-261">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">14d-2(b)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14d-2(b))</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%">&#160;</td>
<td style="width:5%;vertical-align:top"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:boolballotbox" id="ixv-262">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">13e-4(c)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.13e-4(c))</span></p></td></tr></table> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Securities registered pursuant to Section&#160;12(b) of the Act:</p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="border-collapse:collapse; font-family:Times New Roman; font-size:8pt;width:100%;border:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom;white-space:nowrap"> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Title of each class</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Trading</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Symbol(s)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; border-bottom:1.00pt solid #000000;vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Name of each exchange</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">on which registered</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style=" text-align: center;margin:auto; vertical-align:top"><ix:nonNumeric name="dei:Security12bTitle" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-263">Common Stock, without par value</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><ix:nonNumeric name="dei:TradingSymbol" contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-264">NEU</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style=" text-align: center;margin:auto; vertical-align:top"><ix:nonNumeric name="dei:SecurityExchangeName" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:exchnameen" id="ixv-265">New York Stock Exchange</ix:nonNumeric></td></tr></table> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule <span style="white-space:nowrap">12b-2</span> of the Securities Exchange Act of 1934.</p> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Emerging growth company&#8194;<ix:nonNumeric name="dei:EntityEmergingGrowthCompany" contextRef="duration_2024-10-24_to_2024-10-24" format="ixt-sec:boolballotbox" id="ixv-266">&#9744;</ix:nonNumeric></p> <p style="margin-top:10pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&#160;13(a) of the Exchange Act.&#8194;&#9744;</p> <p style="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <p style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</p> <p style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</p></div></div>

<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%;clear:both"/>

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">

<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top" align="left"><span style="font-weight:bold">Item&#8201;8.01</span></td>
<td align="left" style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Other Events. </p></td></tr></table> <p style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On October&#160;24, 2024, NewMarket Corporation (the &#8220;Company&#8221;) issued a press release reporting that the Company&#8217;s Board of Directors had declared a dividend of $2.50 per share of the Company&#8217;s common stock, payable on January&#160;2, 2025, to Company shareholders of record at the close of business on December&#160;16, 2024. A copy of this press release is attached hereto as Exhibit 99.1 and incorporated herein by reference. </p> <p style="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top" align="left"><span style="font-weight:bold">Item&#8201;9.01</span></td>
<td align="left" style="vertical-align:top"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Financial Statements and Exhibits. </p></td></tr></table> <p style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(d) Exhibits. </p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border:0;margin:0 auto">


<tr>

<td/>

<td style="vertical-align:bottom;width:3%"/>
<td style="width:88%"/></tr>


<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">Exhibit&#160;99.1</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top"><a href="d874832dex991.htm">Press release regarding the quarterly dividend issued by the Company on October&#160;24, 2024 </a></td></tr>
<tr style="font-size:1pt">
<td style="height:6pt"/>
<td style="height:6pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">Exhibit&#160;104</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top">Cover Page Interactive Data File (Embedded within the inline XBRL document)</td></tr>
</table>
</div></div>



<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%;clear:both"/>

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">
 <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">SIGNATURES </p> <p style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. </p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date: October&#160;24, 2024 </p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p><div>
<table cellspacing="0" cellpadding="0" style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:40%;border:0;margin-left:auto">


<tr>

<td style="width:12%"/>

<td style="vertical-align:bottom;width:1%"/>
<td style="width:87%"/></tr>


<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top" colspan="3">NewMarket Corporation</td></tr>
<tr style="font-size:1pt">
<td style="height:12pt"/>
<td style="height:12pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top">By:</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ William J. Skrobacz</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top">Name:</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">William J. Skrobacz</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top">Title:</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">Vice President and Chief Financial Officer</td></tr>
</table></div>
</div></div>

</body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d874832dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
<HTML><HEAD>
<TITLE>EX-99.1</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE" STYLE="line-height:Normal">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>EXHIBIT 99.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>NEWMARKET CORPORATION DECLARES QUARTERLY DIVIDEND </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Richmond, VA, October&nbsp;24, 2024 - The Board of Directors of NewMarket Corporation (NYSE: NEU) declared a quarterly dividend in the amount of $2.50 per
share on the common stock of the Corporation. The dividend is payable January&nbsp;2, 2025, to NewMarket shareholders of record at the close of business on December&nbsp;16, 2024. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">NewMarket Corporation is a holding company operating through its subsidiaries Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), and American
Pacific Corporation (AMPAC). The Afton and Ethyl companies develop, manufacture, blend, and deliver chemical additives that enhance the performance of petroleum products. AMPAC is a manufacturer of specialty materials primarily used in solid rocket
motors for the aerospace and defense industries. The NewMarket family of companies has a long-term commitment to its people, to safety, to providing innovative solutions for its customers, and to making the world a better place. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Some of the information contained in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform
Act of 1995. Although NewMarket&#146;s management believes its expectations are based on reasonable assumptions within the bounds of its knowledge of its business and operations, there can be no assurance that actual results will not differ
materially from expectations. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Factors that could cause actual results to differ materially from expectations include, but are not limited to, the
availability of raw materials and distribution systems; disruptions at production facilities, including single-sourced facilities; hazards common to chemical businesses; the ability to respond effectively to technological changes in our industries;
failure to protect our intellectual property rights; sudden, sharp, or prolonged raw material price increases; competition from other manufacturers; current and future governmental regulations; the loss of significant customers; termination or
changes to contracts with contractors and subcontractors of the U.S. government or directly with the U.S. government; failure to attract and retain a highly-qualified workforce; an information technology system failure or security breach; the
occurrence or threat of extraordinary events, including natural disasters, terrorist attacks, wars and health-related epidemics; risks related to operating outside of the United States; political, economic, and regulatory factors concerning our
products; the impact of substantial indebtedness on our operational and financial flexibility; the impact of fluctuations in foreign exchange rates; resolution of environmental liabilities or legal proceedings; limitation of our insurance coverage;
our inability to realize expected benefits from investment in our infrastructure or from acquisitions, or our inability to successfully integrate acquisitions into our business; the underperformance of our pension assets resulting in additional cash
contributions to our pension plans; and other factors detailed from time to time in the reports that NewMarket files with the Securities and Exchange Commission, including the risk factors in Part I, Item 1A. &#147;Risk Factors&#148; of our Annual
Report on Form <FONT STYLE="white-space:nowrap">10-K</FONT> for the year ended December&nbsp;31, 2023 and Part II, Item 1A. &#147;Risk Factors&#148; of our Quarterly Report on Form <FONT STYLE="white-space:nowrap">10-Q</FONT> for the quarterly
period ended September&nbsp;30, 2024, which are available to shareholders at www.newmarket.com. </P>
</DIV></Center>


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

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">You should keep in mind that any forward-looking statement made by NewMarket in the foregoing discussion
speaks only as of the date on which such forward-looking statement is made. New risks and uncertainties arise from time to time, and it is impossible for us to predict these events or how they may affect the Company. We have no duty to, and do not
intend to, update or revise the forward-looking statements in this discussion after the date hereof, except as may be required by law. In light of these risks and uncertainties, you should keep in mind that the events described in any
forward-looking statement made in this discussion, or elsewhere, might not occur. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>CONTACTS: </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>William J. Skrobacz </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>Investor Relations </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>Phone: 804.788.5555 </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>Fax: 804.788.5688 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman"><B>Email: <U>investorrelations@newmarket.com</U> </B></P>
</DIV></Center>

</BODY></HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>neu-20241024.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20241008.3 -->
<!-- Creation date: 10/25/2024 12:52:48 AM Eastern Time -->
<!-- Copyright (c) 2024 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema
  xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric"
  xmlns:num="http://www.xbrl.org/dtr/type/numeric"
  xmlns:us-types="http://fasb.org/us-types/2023"
  xmlns:neu="http://www.newmarket.com/20241024"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  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:xbrldt="http://xbrl.org/2005/xbrldt"
  attributeFormDefault="unqualified"
  elementFormDefault="qualified"
  targetNamespace="http://www.newmarket.com/20241024"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <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="https://xbrl.sec.gov/dei/2023/dei-2023.xsd" namespace="http://xbrl.sec.gov/dei/2023" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
    <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2023/naics-2023.xsd" namespace="http://xbrl.sec.gov/naics/2023" />
    <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="neu-20241024_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="neu-20241024_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>neu-20241024_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20241008.3 -->
<!-- Creation date: 10/25/2024 12:52:48 AM Eastern Time -->
<!-- Copyright (c) 2024 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <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:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <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:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <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:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <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:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <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:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <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:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <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:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Written Communications</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <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:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Soliciting Material</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <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:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <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:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Issuer Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Issuer Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <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:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security 12b Title</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security 12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <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:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <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:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <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:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>neu-20241024_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release master Build:20241008.3 -->
<!-- Creation date: 10/25/2024 12:52:48 AM Eastern Time -->
<!-- Copyright (c) 2024 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
    xmlns:link="http://www.xbrl.org/2003/linkbase"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
    xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="neu-20241024.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple" />
  <link:presentationLink xlink:type="extended" xlink:role="http://www.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="22.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="23.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="24.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="26.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="27.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="28.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="29.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="30.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="31.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="32.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince" order="33.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="34.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="35.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="36.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_WrittenCommunications" xlink:type="locator" 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_WrittenCommunications" order="37.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="38.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="39.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="40.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="41.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="42.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="43.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="44.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<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;">v3.24.3</span><table class="report" border="0" cellspacing="2" id="idm46155697530640">
<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>Oct. 24, 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_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">NEWMARKET CORP<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_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001282637<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_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Oct. 24,  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_EntityIncorporationStateCountryCode', window );">Entity Incorporation State Country Code</a></td>
<td class="text">VA<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">1-32190<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_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">20-0812170<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_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">330 South Fourth Street<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Richmond<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">VA<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">23219<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">(804)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">788-5000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">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_PreCommencementTenderOffer', window );">Pre Commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre Commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Common Stock, without par value<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">NEU<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<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>
</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>8
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 Financial_Report.xlsx
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M=]W3CHG&K=!X#;[Q3X?#KHG&J]!TZVDF)_VN:Z3I%FA"1N/K>A(5M>5 TR
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M!Z.:60F]A%9JGZJ'-#ZH'C(*!?&Y'C[E>G@*-Y;&O%"N@GL!_]':-\*K^(+
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MU4#E/]O4#6CV#30<D05>,9FV-J/D3@H\W/[O#;#"Q([A[8N_ 5!+ P04
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M,AF**I9P6B#BR2!M:59]L$].M.=Y%S?W1:[-XPFNWPQP>'3^ 5!+ P04
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MYHOA/UY_ 5!+ 0(4 Q0    ( *Z(6%D'04UB@0   +$    0
M  "  0    !D;V-0<F]P<R]A<' N>&UL4$L! A0#%     @ KHA868T:\"#O
M    *P(  !$              ( !KP   &1O8U!R;W!S+V-O<F4N>&UL4$L!
M A0#%     @ KHA869E<G",0!@  G"<  !,              ( !S0$  'AL
M+W1H96UE+W1H96UE,2YX;6Q02P$"% ,4    " "NB%A98UOR&T $  !_$
M&               @($."   >&PO=V]R:W-H965T<R]S:&5E=#$N>&UL4$L!
M A0#%     @ KHA869^@&_"Q @  X@P   T              ( !A P  'AL
M+W-T>6QE<RYX;6Q02P$"% ,4    " "NB%A9EXJ[',     3 @  "P
M        @ %@#P  7W)E;',O+G)E;'-02P$"% ,4    " "NB%A9'#AEZC\!
M   \ @  #P              @ %)$   >&PO=V]R:V)O;VLN>&UL4$L! A0#
M%     @ KHA8620>FZ*M    ^ $  !H              ( !M1$  'AL+U]R
M96QS+W=O<FMB;V]K+GAM;"YR96QS4$L! A0#%     @ KHA86660>9(9 0
MSP,  !,              ( !FA(  %M#;VYT96YT7U1Y<&5S72YX;6Q02P4&
2      D "0 ^ @  Y!,

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<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>10
<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>12
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.3</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="d874832d8k.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.newmarket.com//20241024/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" original="d874832d8k.htm">d874832d8k.htm</File>
    <File>neu-20241024.xsd</File>
    <File>neu-20241024_lab.xml</File>
    <File>neu-20241024_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="22">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>15
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "d874832d8k.htm": {
   "nsprefix": "neu",
   "nsuri": "http://www.newmarket.com/20241024",
   "dts": {
    "inline": {
     "local": [
      "d874832d8k.htm"
     ]
    },
    "schema": {
     "local": [
      "neu-20241024.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/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "https://www.xbrl.org/dtr/type/2022-03-31/types.xsd",
      "https://xbrl.sec.gov/dei/2023/dei-2023.xsd",
      "https://xbrl.sec.gov/naics/2023/naics-2023.xsd"
     ]
    },
    "labelLink": {
     "local": [
      "neu-20241024_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "neu-20241024_pre.xml"
     ]
    }
   },
   "keyStandard": 22,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 3,
    "http://xbrl.sec.gov/dei/2023": 3
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 23,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2023": 22
   },
   "report": {
    "R1": {
     "role": "http://www.newmarket.com//20241024/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": "duration_2024-10-24_to_2024-10-24",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d874832d8k.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "duration_2024-10-24_to_2024-10-24",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d874832d8k.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "City Area Code",
        "terseLabel": "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]",
        "terseLabel": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2023",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, City or Town",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, State or Province",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Emerging Growth Company",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity File Number",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Incorporation State Country Code",
        "terseLabel": "Entity Incorporation State 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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Registrant Name",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Tax Identification Number",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Local Phone Number",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Issuer Tender Offer",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Tender Offer",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security 12b Title",
        "terseLabel": "Security 12b Title",
        "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Exchange Name",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Soliciting Material",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Trading Symbol",
        "terseLabel": "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.newmarket.com//20241024/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Written Communications",
        "terseLabel": "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>16
<FILENAME>0001193125-24-242955-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001193125-24-242955-xbrl.zip
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MUAC^J S-!OGQK:#D../XT[LB!$7G OC@D:#'?()\[; =*W?:"U7."&&00U
M$,+%N*8@]1+J;:@M9\"^HEDXFCWRLG94^87!\MVJJ6T<2!:-ZEFQF#DQS<5A
MY":;'UM9W&LF$0X"#Z061&V3?/%V/.!/8*0@6HSRQ5S;+'C$$7" F'51M(<$
M.JF,(/*P2+9FLF]IX]ULHBX3-*-:ZQ'G'D&<KV2),P!W%?MWV !UB,<>U;*I
M0K6XRW53;Y)'^Q==ZBE(H0+P11+?A667#%:^'WH2^X2%PALB 2HIND,]0MR
M=8!?4=C"HJ%3&P\A] ,BY0^3LB[S@$C53GE#5$7#HKQ0ED[73;1O*Y%NC4\R
ME<U42GTV=3^5VE_):3#FI;T+[Q<;Q:C&R?OSN<9O$<Y^YU3"BJK\0^C'(:;8
MV*7M,.9U,*RF!-E+8W%)T5\Z*Q3.9Z%X!;<A+0EH<O'1QC ]=1#.J,:\ 6:D
MF8."U+9_,P2!*M@GL3#+R8UVM;]^:)VAVJ<FLO-F%BI.A>YS7(LW"=^NA+<
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M^.Z7Z#57FAXV0I1_U ?Q4(G,[+ HWW9FW%U23^JE7+D6&JJ=DHV<3L35^-_
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M&_2/86C(/Y5L"7A3!H0$4P@7=FP#5:C7<X&(>?*DX$I>2W%/>=#PN6V9QDL
MOLR8C?HGL6CH6W5;XC]]=J?1R:OA#D$K5JHFH8$?Q'&X%BKVV5]TV?Q&CUWA
M)8R"W91M$+8BT<; HMK2$*250)?"O'G3GHVJ :CMQ?&-4,:@)'X3X+=SNGH;
ME*UQL7O-Z4U0.SI(X":_YXTR#J?X?6Z] :IFLVX@FG<FLNN%X UO&N[F=01D
MJ0%AO^X"IET+"<Y$'!)UK)LG[?1;A+1)TVZ@_B%I'!,^$5&TXME-&567UI+D
MCI"MMB(J@ES@K1!$(CBK -LEG"ENL?$BRDV[=\/Y5C :T)CR^6>]XY;49W59
MMF5V!'*%"5$6X8)PF1H2OX_RD.L[P]M6RT5R&_7MANVU)&8^B,8B>1>-^8B
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M,S)D97@Y.3$N:'1M4$L! A0#%     @ KHA86<J;$98_ P  3@L  !
M         ( !NA@  &YE=2TR,#(T,3 R-"YX<V102P$"% ,4    " "NB%A9
MX]A3 &(&  # 0P  %               @ $G'   ;F5U+3(P,C0Q,#(T7VQA
M8BYX;6Q02P$"% ,4    " "NB%A9]5"N&+@$  !_*@  %
M@ &[(@  ;F5U+3(P,C0Q,#(T7W!R92YX;6Q02P4&      4 !0 ] 0  I2<
#

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>17
<FILENAME>d874832d8k_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="neu-20241024.xsd" xlink:type="simple"/>
    <context id="duration_2024-10-24_to_2024-10-24">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001282637</identifier>
        </entity>
        <period>
            <startDate>2024-10-24</startDate>
            <endDate>2024-10-24</endDate>
        </period>
    </context>
    <dei:EntityRegistrantName
      contextRef="duration_2024-10-24_to_2024-10-24"
      id="Hidden_dei_EntityRegistrantName">NEWMARKET CORP</dei:EntityRegistrantName>
    <dei:AmendmentFlag contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-237">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2024-10-24_to_2024-10-24"
      id="Hidden_dei_EntityCentralIndexKey">0001282637</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-248">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-249">2024-10-24</dei:DocumentPeriodEndDate>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-250">VA</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-251">1-32190</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-252">20-0812170</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-253">330 South Fourth Street</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-254">Richmond</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-255">VA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-256">23219</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-257">(804)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-258">788-5000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-259">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-260">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-261">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-262">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-263">Common Stock, without par value</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-264">NEU</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-265">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2024-10-24_to_2024-10-24" id="ixv-266">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
