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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020 (remainder of year)</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_1B0A1120C10362862A6AA253D861401B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80E4606D42C3CA7EFCE4A253D861450C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_7279F68272FFE92435E4A253D8626EE8" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_EB5E22A7AE82CEF4ECFBA253D8623ECC" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_0A6014D89D3A84A78236A253D8627480" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_8521B916ACBE7EAA7565A253D862914A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A_totalLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total lease payments</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_DAF69CEA108DBA9A8C12A253D8621C7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_78C16D2055971446DC53A253D8624CF2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_78C16D2055971446DC53A253D8624CF2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less imputed interest</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_78C16D2055971446DC53A253D8624CF2_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_78C16D2055971446DC53A253D8624CF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_78C16D2055971446DC53A253D8624CF2" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseLiability_D965D92695408E1CE8DCA253D8638127_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_D965D92695408E1CE8DCA253D8638127" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_D965D92695408E1CE8DCA253D8638127_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_D965D92695408E1CE8DCA253D8638127" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_D965D92695408E1CE8DCA253D8638127" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_9F98BCF49328E9378795A253D863290E_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_9F98BCF49328E9378795A253D863290E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current operating lease liabilities, included in accrued liabilities</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_9F98BCF49328E9378795A253D863290E_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_9F98BCF49328E9378795A253D863290E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_9F98BCF49328E9378795A253D863290E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_7302FDA2F9345EA1B747A253D863AD79_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_7302FDA2F9345EA1B747A253D863AD79" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term operating lease liabilities</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_7302FDA2F9345EA1B747A253D863AD79_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_7302FDA2F9345EA1B747A253D863AD79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_7302FDA2F9345EA1B747A253D863AD79" xlink:type="locator" />
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    <link:label id="lab_idxx_SaasSubscriptionTermOfContract_8B351105F4A89457BA711D2D549D815A_terseLabel_en-US" xlink:label="lab_idxx_SaasSubscriptionTermOfContract_8B351105F4A89457BA711D2D549D815A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SaaS Subscription, term of contract</link:label>
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    <link:label id="lab_us-gaap_AssetsAbstract_D95123CC0F6CB54159D3C7A57AAD9560_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_D95123CC0F6CB54159D3C7A57AAD9560" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrentAbstract_CD7ED8C7DB5E25D1735AC7A57AADB35A_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_CD7ED8C7DB5E25D1735AC7A57AADB35A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current [Abstract]</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A778C401748F9B79FD56C7A57AAD1294_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A778C401748F9B79FD56C7A57AAD1294" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
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    <link:label id="lab_us-gaap_Assets_F2BC74836F289D7E3544C7A57AB02EEE_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_F2BC74836F289D7E3544C7A57AB02EEE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">TOTAL ASSETS</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_3E146214E2416FD688C5C7A57AB0D837_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_3E146214E2416FD688C5C7A57AB0D837" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_A39CF39E172901030EA3C7A57AB01FDB_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_A39CF39E172901030EA3C7A57AB01FDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
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    <link:label id="lab_idxx_LpdSegmentMember_C36DB9BB9A90D564F6141D2D5466D011_terseLabel_en-US" xlink:label="lab_idxx_LpdSegmentMember_C36DB9BB9A90D564F6141D2D5466D011" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LPD segment revenue</link:label>
    <link:loc xlink:href="idxx-20200331.xsd#idxx_LpdSegmentMember" xlink:label="loc_idxx_LpdSegmentMember_C36DB9BB9A90D564F6141D2D5466D011" xlink:type="locator" />
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    <link:label id="lab_idxx_OtherSegmentMember_BBD00D43EE7C2E5310591D2D5466EC6D_terseLabel_en-US" xlink:label="lab_idxx_OtherSegmentMember_BBD00D43EE7C2E5310591D2D5466EC6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other segment revenue</link:label>
    <link:loc xlink:href="idxx-20200331.xsd#idxx_OtherSegmentMember" xlink:label="loc_idxx_OtherSegmentMember_BBD00D43EE7C2E5310591D2D5466EC6D" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_49699995DC1E9407BEA8CBD287FA8A6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_49699995DC1E9407BEA8CBD287FA8A6D" xlink:to="lab_us-gaap_ProfitLoss_49699995DC1E9407BEA8CBD287FA8A6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), net of tax:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_08539EC9F651B416A502CBD287FAF37A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency translation adjustments</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_8C3023FDDEE18887C412CBD287FAF7C6" xlink:type="arc" />
    <link:label id="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax_95770CEE71B45D4F6946CBD287FAA909_terseLabel_en-US" xlink:label="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax_95770CEE71B45D4F6946CBD287FAA909" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain on Euro-denominated notes, net of tax expense of $330 in 2020 and $466 in 2019</link:label>
    <link:loc xlink:href="idxx-20200331.xsd#idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax" xlink:label="loc_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax_95770CEE71B45D4F6946CBD287FAA909" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax_95770CEE71B45D4F6946CBD287FAA909" xlink:to="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeEuroDenominatedNotesGainLossAfterReclassificationAndTax_95770CEE71B45D4F6946CBD287FAA909" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized (loss) gain on investments, net of tax (benefit) expense of $(89) in 2020 and $128 in 2019</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_F59E463C79FCE23604C4CBD287FAC971" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain (loss) on derivative instruments:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_F206E8296121364E5E9DCBD287FACE70" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain on foreign currency exchange contracts, net of tax expense of $2,052 in 2020 and $224 in 2019</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_15C2293FF9EEE62BA287CBD287FE26F8" xlink:type="arc" />
    <link:label id="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax_EFBBE361A23DCADCE567CBD287FE19F9_terseLabel_en-US" xlink:label="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax_EFBBE361A23DCADCE567CBD287FE19F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain on cross currency swaps, net of tax expense of $869 in 2020 and $307 in 2019</link:label>
    <link:loc xlink:href="idxx-20200331.xsd#idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax" xlink:label="loc_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax_EFBBE361A23DCADCE567CBD287FE19F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax_EFBBE361A23DCADCE567CBD287FE19F9" xlink:to="lab_idxx_OtherComprehensiveIncomeLossNetInvestmentHedgeCrossCurrencySwapsGainLossBeforeReclassificationAfterTax_EFBBE361A23DCADCE567CBD287FE19F9" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_F662D0CE3D24B1D9CE44CBD287FEAC74_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_F662D0CE3D24B1D9CE44CBD287FEAC74" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Reclassification adjustment for gain included in net income, net of tax (expense) of $(240) in 2020 and $(249) in 2019</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_F662D0CE3D24B1D9CE44CBD287FEAC74_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_F662D0CE3D24B1D9CE44CBD287FEAC74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_F662D0CE3D24B1D9CE44CBD287FEAC74" xlink:type="locator" />
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    <link:label id="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53_totalLabel_en-US" xlink:label="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Unrealized gain on derivative instruments</link:label>
    <link:label id="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53_label_en-US" xlink:label="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Cash Flow Hedge And Net Investment Hedge, Gain (Loss), After Reclassification And Tax</link:label>
    <link:label id="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53_documentation_en-US" xlink:label="lab_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Cash Flow Hedge And Net Investment Hedge, Gain (Loss), After Reclassification And Tax</link:label>
    <link:loc xlink:href="idxx-20200331.xsd#idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax" xlink:label="loc_idxx_OtherComprehensiveIncomeLossCashFlowHedgeAndNetInvestmentHedgeGainLossAfterReclassificationAndTax_6C1059EC438D0B9A9307CBD287FEDF53" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_EEEC480C176A898DF8A5CBD287FFFA68_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_EEEC480C176A898DF8A5CBD287FFFA68" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive (loss) gain, net of tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_EEEC480C176A898DF8A5CBD287FFFA68" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_6B2C23252E06AAE29DB4CBD287FF29E4_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_6B2C23252E06AAE29DB4CBD287FF29E4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_6B2C23252E06AAE29DB4CBD287FF29E4_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_6B2C23252E06AAE29DB4CBD287FF29E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_6B2C23252E06AAE29DB4CBD287FF29E4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_60D0F7E7A3679CD05FA0CBD287FF802F_terseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_60D0F7E7A3679CD05FA0CBD287FF802F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Comprehensive income attributable to noncontrolling interest</link:label>
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    <link:label id="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_83C1D85CE40B68BAA89ACBD287B54DE5_label_en-US" xlink:label="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_83C1D85CE40B68BAA89ACBD287B54DE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Operating Activities, Cash Flow Statement</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_5B37150485989D5536DBCBD287B958C1" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_5B37150485989D5536DBCBD287B958C1" xlink:type="arc" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2F10B99EBCF177C9C851CBD287B96ED8_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2F10B99EBCF177C9C851CBD287B96ED8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other assets and liabilities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2F10B99EBCF177C9C851CBD287B96ED8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2F10B99EBCF177C9C851CBD287B96ED8" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2F10B99EBCF177C9C851CBD287B96ED8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableTrade_9B09449AEC84DDC98DAFCBD287B94EC5_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableTrade_9B09449AEC84DDC98DAFCBD287B94EC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_25CE2AF9AFC029D64769CBD287B96C05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_25CE2AF9AFC029D64769CBD287B96C05" xlink:to="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_25CE2AF9AFC029D64769CBD287B96C05" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC019ECF9C726919E79ECBD287B9C025" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4229300D358583DAC62CCBD287B98CB5_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4229300D358583DAC62CCBD287B98CB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows from Investing Activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4229300D358583DAC62CCBD287B98CB5_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4229300D358583DAC62CCBD287B98CB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4229300D358583DAC62CCBD287B98CB5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_56D8A13F885EB4B5AE31CBD287B92636_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_56D8A13F885EB4B5AE31CBD287B92636" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of property and equipment</link:label>
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