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Acquisitions - Schedule of Cash Paid and Acquired for Acquisitions (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) acquisition | Mar. 31, 2020 USD ($) acquisition | Dec. 31, 2020 acquisition
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Cash acquired | $ (1,326) | $ (1,986) |
Net cash paid | $ 57,975 | $ 39,329 |
Series of Individually Immaterial Business Acquisitions |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |
Number of acquisitions | acquisition | 3 | 6 | 2
Cash paid at closing | $ 59,301 | $ 98,298 |
Cash acquired | (1,326) | (5,266) |
Net cash paid | $ 57,975 | $ 93,032 |

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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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