Other Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fees	$ 25,911	$ 19,342	$ 76,462	$ 60,094
Manager
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management base fee percentage	1.50%		1.50%
Management incentive fee percentage	20.00%		20.00%
Management core earnings fee percentage	7.00%		7.00%
Management core earnings fee measurement period (in years)			3 years
Management core earnings fee minimum threshold			0.00%
Management fees	$ 18,300	15,800	$ 54,600	46,900
Total incentive compensation payments	7,600	$ 3,600	21,900	$ 13,200
Accrued management and incentive fees payable	$ 25,900		$ 25,900		$ 28,400