Loans - Summary of Activities in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan Losses
Balance at beginning of year				$ 16,242				$ 13,672	$ 16,242	$ 13,672	$ 7,228
Provision for loan loss	$ 755	$ 1,637	$ 1,628	$ 580	$ 444	$ 659	$ 641	$ 1,700	4,600	3,444	6,981
Loans charged off									(827)	(1,332)	(720)
Recoveries									298	458	183
Balance at ending of year	20,313				16,242				20,313	16,242	13,672
Allowance for Unfunded Loan Commitments & Letters of Credit	1,262				1,041				1,262	1,041	641
Total Allowance for Credit Losses	$ 21,575				$ 17,283				$ 21,575	$ 17,283	$ 14,313