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Business Combinations - Estimates of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Customer relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Fair Value | $ 94,473 | $ 28,307 | $ 20,659
Weighted Average Estimated Useful Life (yrs) | 12 years | 8 years | 8 years
Trademarks and tradenames |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Fair Value | $ 23,349 | $ 9,834 | $ 5,286
Weighted Average Estimated Useful Life (yrs) | 15 years | 15 years | 15 years
Non-competition agreements |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Fair Value | $ 7,254 | $ 3,315 | $ 2,096
Weighted Average Estimated Useful Life (yrs) | 5 years | 5 years | 5 years
Backlog |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Fair Value | $ 4,878 | $ 4,767 | $ 0
Weighted Average Estimated Useful Life (yrs) | 2 years 6 months | 1 year 6 months | 0 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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