Other Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fees	$ 23,486	$ 19,207
Manager
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management base fee percentage	1.50%
Management incentive fee percentage	20.00%
Management core earnings fee percentage	7.00%
Management core earnings fee measurement period (in years)	3 years
Management core earnings fee minimum threshold	0.00%
Management fees	$ 18,100	15,600
Total incentive compensation payments	5,400	$ 3,600
Accrued management and incentive fees payable	$ 23,500		$ 28,400