Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2024		Mar. 31, 2024	Dec. 31, 2023		Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets
Equity investments	$ 1,700			$ 1,700
Nonaccrual loans	14,000			14,000
Loan collateral in process of foreclosure	9,359	[1]	$ 10,198	11,772	[1]	$ 16,803	$ 20,467	$ 21,819
Fair Value, Nonrecurring
Assets
Equity investments	10,795			11,430
Nonaccrual loans	22,248			25,974
Loan collateral in process of foreclosure	9,359			11,772
Total	42,402			49,176
Fair Value, Nonrecurring | Level 3 [Member]
Assets
Equity investments	10,795			11,430
Nonaccrual loans	22,248			25,974
Loan collateral in process of foreclosure	9,359			11,772
Total	$ 42,402			$ 49,176

[1] Includes financed sales of this collateral to third parties that are reported separately from the loan portfolio, of $5.3 million as of June 30, 2024 and $6.2 million as of December 31, 2023.