Condensed Financial Statements of Parent Company, Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and cash equivalents	$ 120,437	$ 89,865
Securities available-for-sale	186,409	145,715
OtherAssets	12,838	11,408
Total assets	1,226,191	1,054,488
Liabilities and Stockholders' Equity [Abstract]
Other borrowings	1,350	1,950
Other liability	5,291	4,834
Common stock	25,972	25,901
Additional paid-in capital	21,245	20,959
Retained earnings	65,859	62,975
Accumulated other comprehensive income (loss)	4,069	(79)
Total liabilities and stockholders' equity	1,226,191	1,054,488
Parent Company [Member]
Assets [Abstract]
Cash and cash equivalents	1,203	1,399
Securities available-for-sale	0	0
Investment in common stock of subsidiaries	116,848	110,057
OtherAssets	507	308
Total assets	118,558	111,764
Liabilities and Stockholders' Equity [Abstract]
Other borrowings	1,350	1,950
Other liability	63	58
Common stock	25,972	25,901
Additional paid-in capital	21,245	20,959
Retained earnings	65,859	62,975
Accumulated other comprehensive income (loss)	4,069	(79)
Total liabilities and stockholders' equity	$ 118,558	$ 111,764