Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2024		Dec. 31, 2023		Mar. 31, 2023	Dec. 31, 2022
Assets
Equity investments	$ 1,700		$ 1,700
Impaired loans	14,000		14,000
Loan collateral in process of foreclosure	10,198	[1]	11,772	[1]	$ 20,467	$ 21,819
Fair Value, Nonrecurring
Assets
Equity investments	16,374		11,430
Impaired loans	21,881		25,974
Loan collateral in process of foreclosure	10,198		11,772
Total	48,453		49,176
Fair Value, Nonrecurring | Level 3 [Member]
Assets
Equity investments	16,374		11,430
Impaired loans	21,881		25,974
Loan collateral in process of foreclosure	10,198		11,772
Total	$ 48,453		$ 49,176

[1] Includes financed sales of this collateral to third parties that are reported separately from the loan portfolio, of $5.8 million as of March 31, 2024 and $6.2 million as of December 31, 2023.