Equity-Based Compensation - Schedule of Equity Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total equity compensation expense	$ 7,467	$ 11,106	$ 22,152
Operating Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total equity compensation expense	522	4,076	7,387
Selling, General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total equity compensation expense	$ 6,945	$ 7,030	$ 14,765