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Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 107,901 | $ 151,937
Accumulated Amortization | 29,906 | 54,574
Total | 77,995 | 97,363
Customer Relationships [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 78,450 | 109,825
Accumulated Amortization | 17,277 | 40,169
Total | 61,173 | 69,656
Technology [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 16,956 | 16,661
Accumulated Amortization | 10,197 | 7,051
Total | 6,759 | 9,610
Trademarks [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 12,495 | 12,451
Accumulated Amortization | 2,432 | 854
Total | $ 10,063 | 11,597
Backlog [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount |  | 13,000
Accumulated Amortization |  | 6,500
Total |  | $ 6,500

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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