Condensed Parent Company Financial Information - Summary of Condensed Financial Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 19,543	$ 19,281
Fair Value, Available-for-sale	131,708	190,438
TOTAL ASSETS	1,144,239	1,031,632
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities	1,046,924	937,773
Total shareholders’ equity	97,315	93,859	$ 85,476	$ 76,536
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	1,144,239	1,031,632
Parent Company [Member]
ASSETS
Cash and due from banks	1,244	1,631
Investment in subsidiary bank	95,863	92,043
Fair Value, Available-for-sale	115	87
Other assets	143	146
TOTAL ASSETS	97,365	93,907
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total liabilities	50	48
Total shareholders’ equity	97,315	93,859
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 97,365	$ 93,907