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Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Prepaid Expense and Other Assets [Abstract]    
Prepaid expenses $ 7,285 $ 8,282
Revenues in excess of billings 6,612 6,664
Contract retainage 2,267 1,832
Income tax receivable 7,823 2,675
Other 1,323 350
Total prepaid expenses and other assets $ 25,310 $ 19,803