Parent Company Financial Statements - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from non-affiliated banks	$ 6,096	$ 7,685
Certificates of deposit	2,754	3,746
Other assets	5,847	5,927
Total assets	1,131,923	1,080,617
LIABILITIES AND SHAREHOLDERS' EQUITY
Subordinated notes, net of unamortized issuance costs	31,001	6,893
Deferred compensation plan	1,100	972
Other liabilities	12,772	7,967
Total liabilities	1,005,738	963,141
Total shareholders’ equity	126,185	117,476	$ 114,554
Total liabilities and shareholders’ equity	1,131,923	1,080,617
Parent Company
ASSETS
Cash and due from non-affiliated banks	30,213	15,631
Interest-earning deposits	309	155
Certificates of deposit	770	770
Investments in subsidiaries	127,956	109,747
Other assets	1,411	2,225
Total assets	160,659	128,528
LIABILITIES AND SHAREHOLDERS' EQUITY
Subordinated notes, net of unamortized issuance costs	31,001	6,893
Deferred compensation plan	1,082	972
Other borrowings	1,525	1,734
Other liabilities	866	1,453
Total liabilities	34,474	11,052
Total shareholders’ equity	126,185	117,476
Total liabilities and shareholders’ equity	$ 160,659	$ 128,528