Other Expenses - Schedule of General and Administrative Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Professional services	$ 7,759	$ 7,324	$ 5,163
Operating and other costs	3,762	4,015	3,035
Subtotal	11,521	11,339	8,198
Non-cash compensation expenses
Restricted class A common stock earned	31,052	34,032	30,156
Director stock-based compensation	595	500	500
Subtotal	31,647	34,532	30,656
Total general and administrative expenses	$ 43,168	$ 45,871	$ 38,854