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Business Combinations - Changes in Contingent Purchase Price Consideration (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Business Combinations [Abstract] |  |  |  |
Net Expense (Income) | $ 846 | $ 74 | $ 1,599 | $ (80)
Cash Settlement Paid | $ 0 | $ 4,995 | $ 7,584 | $ 10,881
Shares Issued (number) | 13,000 | 0 | 66,000 | 81,000

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- Definition Business combination contingent consideration liability other adjustments based on projected future results of acquisition. + References No definition available. + Details
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- Definition Number of common shares issued. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Cash outflow representing an adjustment to the purchase price of a previous acquisition. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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