Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary of Income:
Interest income	$ 38,270	$ 36,359	$ 33,377	$ 31,802	$ 29,492	$ 25,847	$ 23,911	$ 21,899	$ 139,808	$ 101,149	$ 76,840
Interest expense	18,335	16,697	13,259	10,120	6,935	3,264	2,047	2,116	58,411	14,362	7,342
Net Interest Income - Before Provision for Credit Losses*	19,935	19,662	20,118	21,682	22,557	22,583	21,864	19,783	81,397	86,787	69,498
Provision for Credit Losses - Loans*	278	460	143	817	755	1,637	1,628	580	1,698	4,600	3,444
Provision for Credit Losses - Off Balance Sheet Credit Exposures*	189	(76)	(129)	62					46
Net Interest Income After Provision for Credit Losses	19,468	19,278	20,104	20,803	21,802	20,946	20,236	19,203	79,653	82,187	66,054
Other income (expense)	(12,593)	(13,380)	(12,572)	(12,754)	(12,908)	(9,739)	(9,915)	(9,150)
Income Before Income Taxes	6,875	5,898	7,532	8,049	8,894	11,207	10,321	10,053	28,354	40,475	29,497
Income Taxes	1,332	1,121	1,531	1,583	1,706	2,253	2,050	1,951	5,567	7,960	6,002
Net Income	$ 5,543	$ 4,777	$ 6,001	$ 6,466	$ 7,188	$ 8,954	$ 8,271	$ 8,102	$ 22,787	$ 32,515	$ 23,495
Earnings per Common Share, Basic	$ 0.41	$ 0.35	$ 0.44	$ 0.47	$ 0.53	$ 0.68	$ 0.63	$ 0.62	$ 1.67	$ 2.46	$ 2.01
Earnings per Common Share, Diluted	$ 0.41	$ 0.35	$ 0.44	$ 0.47	$ 0.53	$ 0.68	$ 0.63	$ 0.62	$ 1.67	$ 2.46	$ 2.01
Average common shares outstanding	13,665,773	13,650,823	13,632,440	13,615,655	13,606,876	12,983,307	12,957,126	12,955,107	13,492,903	13,091,422	11,570,218