<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>299</ContextCount>
  <ElementCount>510</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>105</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/StatementCONDENSEDCONSOLIDATEDBALANCESHEETSUNAUDITED</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/StatementCONDENSEDCONSOLIDATEDBALANCESHEETSUNAUDITEDParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUNAUDITED</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSEQUITYUNAUDITED</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060 - Disclosure - GENERAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERAL</Role>
      <ShortName>GENERAL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070 - Disclosure - ACQUISITIONS AND DIVESTITURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURES</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080 - Disclosure - ACCOUNTS RECEIVABLE, NET OF ALLOWANCE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACCOUNTSRECEIVABLENETOFALLOWANCE</Role>
      <ShortName>ACCOUNTS RECEIVABLE, NET OF ALLOWANCE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100090 - Disclosure - CEMETERY PROPERTY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCEMETERYPROPERTY</Role>
      <ShortName>CEMETERY PROPERTY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100100 - Disclosure - PROPERTY AND EQUIPMENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT</Role>
      <ShortName>PROPERTY AND EQUIPMENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100110 - Disclosure - MERCHANDISE TRUSTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTS</Role>
      <ShortName>MERCHANDISE TRUSTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100120 - Disclosure - PERPETUAL CARE TRUSTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTS</Role>
      <ShortName>PERPETUAL CARE TRUSTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100130 - Disclosure - LONG-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBT</Role>
      <ShortName>LONG-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100140 - Disclosure - STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSTOCKHOLDERSEQUITY</Role>
      <ShortName>STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100150 - Disclosure - DEFERRED REVENUES AND COSTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTS</Role>
      <ShortName>DEFERRED REVENUES AND COSTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100160 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100170 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100180 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureFAIRVALUEOFFINANCIALINSTRUMENTS</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100190 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATION</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100200 - Disclosure - SEGMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSEGMENTINFORMATION</Role>
      <ShortName>SEGMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100210 - Disclosure - SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONSOLIDATEDCASHFLOWINFORMATION</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100220 - Disclosure - RELATED PARTIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureRELATEDPARTIES</Role>
      <ShortName>RELATED PARTIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100230 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUBSEQUENTEVENTS</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100240 - Disclosure - GENERAL (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERALPolicies</Role>
      <ShortName>GENERAL (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100250 - Disclosure - GENERAL (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERALTables</Role>
      <ShortName>GENERAL (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERAL</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100260 - Disclosure - ACQUISITIONS AND DIVESTITURES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURESTables</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURES</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100270 - Disclosure - ACCOUNTS RECEIVABLE, NET OF ALLOWANCE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACCOUNTSRECEIVABLENETOFALLOWANCETables</Role>
      <ShortName>ACCOUNTS RECEIVABLE, NET OF ALLOWANCE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACCOUNTSRECEIVABLENETOFALLOWANCE</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100280 - Disclosure - CEMETERY PROPERTY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCEMETERYPROPERTYTables</Role>
      <ShortName>CEMETERY PROPERTY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCEMETERYPROPERTY</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100290 - Disclosure - PROPERTY AND EQUIPMENT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTTables</Role>
      <ShortName>PROPERTY AND EQUIPMENT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100300 - Disclosure - MERCHANDISE TRUSTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSTables</Role>
      <ShortName>MERCHANDISE TRUSTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTS</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100310 - Disclosure - PERPETUAL CARE TRUSTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSTables</Role>
      <ShortName>PERPETUAL CARE TRUSTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTS</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100320 - Disclosure - LONG-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBTTables</Role>
      <ShortName>LONG-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBT</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100330 - Disclosure - STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSTOCKHOLDERSEQUITYTables</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSTOCKHOLDERSEQUITY</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100340 - Disclosure - DEFERRED REVENUES AND COSTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTSTables</Role>
      <ShortName>DEFERRED REVENUES AND COSTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTS</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100350 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIESTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100360 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASES</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100370 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATIONTables</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATION</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100380 - Disclosure - SEGMENT INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSEGMENTINFORMATIONTables</Role>
      <ShortName>SEGMENT INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSEGMENTINFORMATION</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100390 - Disclosure - SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONSOLIDATEDCASHFLOWINFORMATIONTables</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONSOLIDATEDCASHFLOWINFORMATION</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100400 - Disclosure - SUBSEQUENT EVENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUBSEQUENTEVENTSTables</Role>
      <ShortName>SUBSEQUENT EVENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUBSEQUENTEVENTS</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100410 - Disclosure - GENERAL - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERALAdditionalInformationDetail</Role>
      <ShortName>GENERAL - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100420 - Disclosure - GENERAL - Reconciliation of Company's Weighted-average Number of Outstanding Common Shares (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERALReconciliationOfCompanySWeightedAverageNumberOfOutstandingCommonSharesDetail</Role>
      <ShortName>GENERAL - Reconciliation of Company's Weighted-average Number of Outstanding Common Shares (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100430 - Disclosure - GENERAL - Reconciliation of Company's Weighted-average Number of Outstanding Common Shares (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureGENERALReconciliationOfCompanySWeightedAverageNumberOfOutstandingCommonSharesParentheticalDetail</Role>
      <ShortName>GENERAL - Reconciliation of Company's Weighted-average Number of Outstanding Common Shares (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100440 - Disclosure - ACQUISITIONS AND DIVESTITURES - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURESAdditionalInformationDetail</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100450 - Disclosure - ACQUISITIONS AND DIVESTITURES - Summary of Results of Discontinued Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURESSummaryOfResultsOfDiscontinuedOperationsDetail</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Summary of Results of Discontinued Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100460 - Disclosure - ACQUISITIONS AND DIVESTITURES - Discontinued Operations and Disposal Groups (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURESDiscontinuedOperationsAndDisposalGroupsDetail</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Discontinued Operations and Disposal Groups (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100470 - Disclosure - ACQUISITIONS AND DIVESTITURES - Discontinued Operations Cash Flow Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACQUISITIONSANDDIVESTITURESDiscontinuedOperationsCashFlowActivitiesDetail</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Discontinued Operations Cash Flow Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100480 - Disclosure - ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Long Term Accounts Receivable, Net of Allowance (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACCOUNTSRECEIVABLENETOFALLOWANCELongTermAccountsReceivableNetOfAllowanceDetail</Role>
      <ShortName>ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Long Term Accounts Receivable, Net of Allowance (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100500 - Disclosure - ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Activity in Allowance for Doubtful Accounts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureACCOUNTSRECEIVABLENETOFALLOWANCEActivityInAllowanceForDoubtfulAccountsDetail</Role>
      <ShortName>ACCOUNTS RECEIVABLE, NET OF ALLOWANCE - Activity in Allowance for Doubtful Accounts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100510 - Disclosure - CEMETERY PROPERTY - Schedule of Cemetery Property (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCEMETERYPROPERTYScheduleOfCemeteryPropertyDetail</Role>
      <ShortName>CEMETERY PROPERTY - Schedule of Cemetery Property (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100520 - Disclosure - PROPERTY AND EQUIPMENT - Schedule of Property and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTScheduleOfPropertyAndEquipmentDetail</Role>
      <ShortName>PROPERTY AND EQUIPMENT - Schedule of Property and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100530 - Disclosure - PROPERTY AND EQUIPMENT - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTAdditionalInformationDetail</Role>
      <ShortName>PROPERTY AND EQUIPMENT - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100540 - Disclosure - MERCHANDISE TRUSTS - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSAdditionalInformationDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100550 - Disclosure - MERCHANDISE TRUSTS - Reconciliation of Merchandise Trust Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSReconciliationOfMerchandiseTrustActivitiesDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Reconciliation of Merchandise Trust Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100560 - Disclosure - MERCHANDISE TRUSTS - Cost and Market Value Associated with Assets Held in Merchandise Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSCostAndMarketValueAssociatedWithAssetsHeldInMerchandiseTrustsDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Cost and Market Value Associated with Assets Held in Merchandise Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>100570 - Disclosure - MERCHANDISE TRUSTS - Cost and Market Value Associated with Assets Held in Merchandise Trusts (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSCostAndMarketValueAssociatedWithAssetsHeldInMerchandiseTrustsParentheticalDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Cost and Market Value Associated with Assets Held in Merchandise Trusts (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>100580 - Disclosure - MERCHANDISE TRUSTS - Contractual Maturities of Debt Securities Held in Merchandise Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSContractualMaturitiesOfDebtSecuritiesHeldInMerchandiseTrustsDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Contractual Maturities of Debt Securities Held in Merchandise Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>100590 - Disclosure - MERCHANDISE TRUSTS - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities Held in Merchandise Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureMERCHANDISETRUSTSAgingOfUnrealizedLossesOnInvestmentsInFixedMaturitiesAndEquitySecuritiesHeldInMerchandiseTrustsDetail</Role>
      <ShortName>MERCHANDISE TRUSTS - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities Held in Merchandise Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>100600 - Disclosure - PERPETUAL CARE TRUSTS - Reconciliation of Perpetual Care Trust Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSReconciliationOfPerpetualCareTrustActivitiesDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Reconciliation of Perpetual Care Trust Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>100610 - Disclosure - PERPETUAL CARE TRUSTS - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSAdditionalInformationDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>100620 - Disclosure - PERPETUAL CARE TRUSTS - Cost and Market Value Associated with Assets Held in Perpetual Care Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSCostAndMarketValueAssociatedWithAssetsHeldInPerpetualCareTrustsDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Cost and Market Value Associated with Assets Held in Perpetual Care Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>100630 - Disclosure - PERPETUAL CARE TRUSTS - Cost and Market Value Associated with Assets Held in Perpetual Care Trusts (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSCostAndMarketValueAssociatedWithAssetsHeldInPerpetualCareTrustsParentheticalDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Cost and Market Value Associated with Assets Held in Perpetual Care Trusts (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>100640 - Disclosure - PERPETUAL CARE TRUSTS - Contractual Maturities of Debt Securities Held in Perpetual Care Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSContractualMaturitiesOfDebtSecuritiesHeldInPerpetualCareTrustsDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Contractual Maturities of Debt Securities Held in Perpetual Care Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>100650 - Disclosure - PERPETUAL CARE TRUSTS - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities Held in Perpetual Care Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosurePERPETUALCARETRUSTSAgingOfUnrealizedLossesOnInvestmentsInFixedMaturitiesAndEquitySecuritiesHeldInPerpetualCareTrustsDetail</Role>
      <ShortName>PERPETUAL CARE TRUSTS - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities Held in Perpetual Care Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>100660 - Disclosure - LONG-TERM DEBT - Outstanding Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBTOutstandingDebtDetail</Role>
      <ShortName>LONG-TERM DEBT - Outstanding Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>100680 - Disclosure - LONG-TERM DEBT - Outstanding Debt (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBTOutstandingDebtParentheticalDetail</Role>
      <ShortName>LONG-TERM DEBT - Outstanding Debt (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>100690 - Disclosure - LONG-TERM DEBT - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLONGTERMDEBTAdditionalInformationDetail</Role>
      <ShortName>LONG-TERM DEBT - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>100700 - Disclosure - STOCKHOLDERS' EQUITY - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSTOCKHOLDERSEQUITYAdditionalInformationDetail</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>100710 - Disclosure - STOCKHOLDERS' EQUITY - Restricted Stock and Phantom Stock Awards (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSTOCKHOLDERSEQUITYRestrictedStockAndPhantomStockAwardsDetail</Role>
      <ShortName>STOCKHOLDERS' EQUITY - Restricted Stock and Phantom Stock Awards (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>100720 - Disclosure - DEFERRED REVENUES AND COSTS - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTSAdditionalInformationDetail</Role>
      <ShortName>DEFERRED REVENUES AND COSTS - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>100730 - Disclosure - DEFERRED REVENUES AND COSTS - Schedule of Deferred Revenues and Related Costs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTSScheduleOfDeferredRevenuesAndRelatedCostsDetail</Role>
      <ShortName>DEFERRED REVENUES AND COSTS - Schedule of Deferred Revenues and Related Costs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>100740 - Disclosure - DEFERRED REVENUES AND COSTS - Schedule of Customer Contract Liabilities, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTSScheduleOfCustomerContractLiabilitiesNetDetail</Role>
      <ShortName>DEFERRED REVENUES AND COSTS - Schedule of Customer Contract Liabilities, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>100750 - Disclosure - DEFERRED REVENUES AND COSTS - Revenue, Remaining Performance Obligation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureDEFERREDREVENUESANDCOSTSRevenueRemainingPerformanceObligationDetail</Role>
      <ShortName>DEFERRED REVENUES AND COSTS - Revenue, Remaining Performance Obligation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>100760 - Disclosure - COMMITMENTS AND CONTINGENCIES - Contractual Annual Amounts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIESContractualAnnualAmountsDetail</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Contractual Annual Amounts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>100770 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIESAdditionalInformationDetail</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>100780 - Disclosure - COMMITMENTS AND CONTINGENCIES - Fixed Rent for Cemeteries (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureCOMMITMENTSANDCONTINGENCIESFixedRentForCemeteriesDetail</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Fixed Rent for Cemeteries (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>100790 - Disclosure - LEASES - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESAdditionalInformationDetail</Role>
      <ShortName>LEASES - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>100800 - Disclosure - LEASES - Schedule of Components of Leases (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESScheduleOfComponentsOfLeasesDetail</Role>
      <ShortName>LEASES - Schedule of Components of Leases (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>100810 - Disclosure - LEASES - Components of Lease Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESComponentsOfLeaseExpenseDetail</Role>
      <ShortName>LEASES - Components of Lease Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>100820 - Disclosure - LEASES - Components of Lease Expense (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESComponentsOfLeaseExpenseParentheticalDetail</Role>
      <ShortName>LEASES - Components of Lease Expense (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>100830 - Disclosure - LEASES - Schedule of Maturities the Company's of Lease Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureLEASESScheduleOfMaturitiesCompanySOfLeaseLiabilitiesDetail</Role>
      <ShortName>LEASES - Schedule of Maturities the Company's of Lease Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>100850 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureFAIRVALUEOFFINANCIALINSTRUMENTSAdditionalInformationDetail</Role>
      <ShortName>FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>100860 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATIONAdditionalInformationDetail</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>100870 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Balance Sheets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATIONCondensedConsolidatingBalanceSheetsDetail</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Balance Sheets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>100880 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Statements of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATIONCondensedConsolidatingStatementsOfOperationsDetail</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Statements of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>100890 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Statement of Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONDENSEDCONSOLIDATINGFINANCIALINFORMATIONCondensedConsolidatingStatementOfCashFlowsDetail</Role>
      <ShortName>SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Condensed Consolidating Statement of Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>100900 - Disclosure - SEGMENT INFORMATION - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSEGMENTINFORMATIONAdditionalInformationDetail</Role>
      <ShortName>SEGMENT INFORMATION - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>100910 - Disclosure - SEGMENT INFORMATION - Segment Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSEGMENTINFORMATIONSegmentInformationDetail</Role>
      <ShortName>SEGMENT INFORMATION - Segment Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>100920 - Disclosure - SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION - Schedule of Cash Flow, Supplemental Disclosures (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUPPLEMENTALCONSOLIDATEDCASHFLOWINFORMATIONScheduleOfCashFlowSupplementalDisclosuresDetail</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION - Schedule of Cash Flow, Supplemental Disclosures (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>100930 - Disclosure - RELATED PARTIES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureRELATEDPARTIESAdditionalInformationDetails</Role>
      <ShortName>RELATED PARTIES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>100940 - Disclosure - SUBSEQUENT EVENTS - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUBSEQUENTEVENTSAdditionalInformationDetail</Role>
      <ShortName>SUBSEQUENT EVENTS - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="ston-20210331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>100950 - Disclosure - SUBSEQUENT EVENTS - Schedule of Redemption Prices Percentage of Principal Amount (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.stonemor.com/20210331/taxonomy/role/DisclosureSUBSEQUENTEVENTSScheduleOfRedemptionPricesPercentageOfPrincipalAmountDetail</Role>
      <ShortName>SUBSEQUENT EVENTS - Schedule of Redemption Prices Percentage of Principal Amount (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ston-20210331.xml</File>
    <File>ston-20210331.xsd</File>
    <File>ston-20210331_cal.xml</File>
    <File>ston-20210331_def.xml</File>
    <File>ston-20210331_lab.xml</File>
    <File>ston-20210331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
