Other Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Management fees	$ 28,882	$ 25,911	$ 92,747	$ 76,462
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	$ 18,800	18,300	$ 56,000	54,600
Total incentive compensation payments	10,100	$ 7,600	36,800	$ 21,900
Accrued management and incentive fees payable	$ 28,900		$ 28,900		$ 33,800