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Identifiable Intangible Assets from Acquisitions - Summary of Identifiable Intangible Assets from Acquisitions (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Acquired Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 26,530   $ 26,530
Accumulated Amortization (11,219)   (7,045)
Net Carrying Amount 9,408 $ 11,800 19,485
Impairment (5,903) $ (5,900)  
Customer Relationships      
Acquired Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 13,018   13,018
Accumulated Amortization (4,290)   (2,784)
Net Carrying Amount 4,526   10,234
Impairment (4,202)    
Technologies      
Acquired Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 9,369   9,369
Accumulated Amortization (4,126)   (2,252)
Net Carrying Amount 4,181   7,117
Impairment (1,062)    
Non-compete Agreements      
Acquired Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 3,409   3,409
Accumulated Amortization (2,285)   (1,628)
Net Carrying Amount 666   1,781
Impairment (458)    
Tradenames      
Acquired Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 734   734
Accumulated Amortization (518)   (381)
Net Carrying Amount 35   $ 353
Impairment $ (181)