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Acquisitions - Schedule of Cash Paid and Acquired for Acquisitions (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
acquisition
Dec. 31, 2019
USD ($)
acquisition
Dec. 31, 2018
USD ($)
acquisition
Business Combination, Separately Recognized Transactions [Line Items]      
Cash acquired $ (5,266) $ (2,523) $ (7,774)
Net cash paid $ 93,032 $ 34,054 $ 135,264
Series of Individually Immaterial Business Acquisitions      
Business Combination, Separately Recognized Transactions [Line Items]      
Number of acquisitions | acquisition 6,000 4,000 7,000
Cash paid at closing $ 98,298 $ 36,577 $ 143,038
Cash acquired (5,266) (2,523) (7,774)
Net cash paid 93,032 $ 34,054 $ 135,264
Escrow deposit $ 3,413