Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Prepaid Expense and Other Assets [Abstract]
Prepaid expenses	$ 8,641	$ 7,285
Revenues in excess of billings	14,150	8,879
Income tax receivable	7,382	7,823
Other	213	1,323
Total prepaid expenses and other assets	$ 30,386	$ 25,310