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Leases - Other Information (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash flows from operating leases | $ 14,602 | $ 13,589
Right-of-use assets obtained in exchange for new operating lease liabilities | 5,286 | 14,530
Series of Individually Immaterial Business Acquisitions |  |
Cash paid for amounts included in the measurement of lease liabilities: |  |
Right-of-use assets obtained in exchange for lease liabilities, business acquisitions | $ 12,074 | $ 1,668

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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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