Fair Value Disclosures - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value on a Nonrecurring Basis [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 673	$ 187
Total assets at fair value on a nonrecurring basis	673	187
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	673	187
Total assets at fair value on a nonrecurring basis	$ 673	$ 187