Loans Receivable - Summary of Allowance for Loan Losses On Loans Receivables (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Receivables [Abstract]
Provision for credit losses	$ (182)	$ 200	$ 2,546	$ 200
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	0	$ 200	1,340	$ 200
Increase decrease in reserve for unfunded liabilities	$ 182		501
Financing receivable allowance for credit loss not purchased with credit deterioration			$ 1,700