Loans And Allowance For Credit Losses - Non-Accrual Loans, Loans Still Accruing and Past Due 90 Days or More and Restructured Loans (Detail) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Nonaccrual loans		$ 24,306,000	$ 31,652,000
Total 90 Days Past Due Still Accruing		0	8,000
Troubled debt restructured loans*	[1]	19,000	21,000
Total		$ 24,325,000	$ 31,681,000

[1] Troubled debt restructured loans of $3,624,000 and $6,721,000, for which interest collection is doubtful, are included in nonaccrual loans as of December 31, 2022 and 2021, respectively.