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Plateau Acquisition - Consideration Transferred and Purchase Price Allocation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Oct. 02, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Combination, Consideration Transferred [Abstract]        
Share consideration given for acquisitions   $ 0 $ 16,195 $ 0
Tax basis election   0 5,015 $ 0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]        
Goodwill   $ 192,014 $ 191,892  
Plateau        
Business Combination, Consideration Transferred [Abstract]        
Cash consideration transferred, net of $2,425 of cash acquired $ 375,000      
Target working capital adjustment 21,323      
Share consideration given for acquisitions 16,195      
Sellers Note 10,000      
Tax basis election 5,015      
Total consideration 427,533      
Cash acquired $ 2,425      
Shares issued in acquisition of business (in shares) 1,245      
Business acquisition share price $ 13.01      
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]        
Accounts receivable $ 61,110      
Contract assets 13,035      
Other current assets 249      
Property and equipment, net 65,492      
Other non-current assets, net 10      
Accounts payable (22,039)      
Contract liabilities (7,790)      
Other current and non-current liabilities (7,918)      
Total net tangible assets 102,149      
Identifiable intangible assets 218,600      
Goodwill 106,784      
Total consideration transferred $ 427,533