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Acquisition - Summary of acquisition by acquisition (Details) - USD ($)
$ in Thousands
 9 Months Ended
Jan. 04, 2022
Sep. 30, 2022
Dec. 31, 2021
Business Acquisition [Line Items]      
Goodwill   $ 115,151 $ 66,065
Powerline Plus Companies      
Business Acquisition [Line Items]      
Cash paid $ 114,429 114,429  
Measurement Period Adjustments, Cash paid   0  
Contingent consideration - fair value at acquisition date 10,608 865  
Measurement Period Adjustments, Contingent consideration - fair value at acquisition date   (9,743)  
Net asset and other adjustments 563 84  
Measurement Period Adjustments, Preliminary estimated net asset adjustments   (479)  
Total consideration, net of estimated net asset adjustments 125,600 115,378  
Measurement Period Adjustments, Total consideration   (10,222)  
Less: Acquired cash (3,853) (3,853)  
Measurement Period Adjustments, Cash acquired   0  
Total consideration less cash acquired, net of net asset and other adjustments 121,747 111,525  
Measurement Period Adjustments, Total consideration less cash acquired, net of estimated net asset adjustments   (10,222)  
Cash and cash equivalents 3,853 3,853  
Measurement Period Adjustments, Cash and cash equivalents   0  
Accounts receivable 12,131 12,079  
Measurement Period Adjustment, Accounts receivable   (52)  
Contract assets, net 12,443 12,591  
Measurement period adjustment, Contract assets, net   148  
Refundable income taxes 394 876  
Measurement Period Adjustments, Refundable income taxes   482  
Prepaid expenses and other current assets 1,233 1,112  
Measurement Period Adjustments, Prepaid expenses and other assets   (121)  
Property and equipment 10,366 11,943  
Measurement Period Adjustments, Property and equipment   1,577  
Operating lease right-of-use assets 6,631 6,631  
Measurement Period Adjustments, Operating lease right-of-use assets   0  
Intangible assets 0 49,735  
Measurement Period Adjustments, Intangible assets   49,735  
Accounts payable (8,095) (8,561)  
Measurement Period Adjustments, Accounts payable   (466)  
Contract liabilities (1,597) (1,692)  
Measurement Period Adjustments, Contract liabilities   (95)  
Current portion of operating lease obligations (1,224) (1,224)  
Measurement Period Adjustments, Current portion of operating lease obligations   0  
Current portion of finance lease obligations (1,492) (1,492)  
Measurement Period Adjustments, Current portion of finance lease obligations   0  
Deferred income tax liabilities (1,358) (15,349)  
Measurement Period Adjustments, Deferred income tax liabilities   (13,991)  
Operating lease obligations, net of current maturities (4,897) (4,897)  
Measurement Period Adjustments, Operating lease obligations, net of current maturities   0  
Finance lease obligations, net of current maturities (3,243) (3,243)  
Measurement Period Adjustments, Finance lease obligations, net of current maturities   0  
Net identifiable assets and liabilities 25,145 62,362  
Measurement Period Adjustments, Net identifiable assets and liabilities   37,217  
Unallocated intangible assets 56,650 0  
Measurement Period Adjustments, Unallocated intangible assets   (56,650)  
Total acquired assets and liabilities 81,795 62,362  
Measurement Period Adjustments, Total acquired assets and liabilities   (19,433)  
Goodwill $ 43,805 53,016  
Measurement Period Adjustments, Goodwill   $ 9,211