Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, Beginning at Dec. 31, 2019	$ 211,820	$ 0	$ 3,000	$ 27,260	$ 184,821	$ (3,261)
Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2019			16,379,752
Stockholders' Equity [Roll Forward]
Net income	8,089				8,089
Other comprehensive income (loss), net of tax	(15,539)					(15,539)
Cash dividends declared, common stock	(3,440)				(3,440)
Stock-based compensation costs	512			512
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, value	(749)	0	$ 0	(749)	0	0
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, shares			67,520
Balance, Ending at Mar. 31, 2020	$ 200,693		$ 3,000	27,023	189,470	(18,800)
Common Stock, Shares, Outstanding, Ending at Mar. 31, 2020			16,447,272
Stockholders' Equity [Roll Forward]
Cash dividends declared per common share	$ 0.21
Balance, Beginning at Dec. 31, 2020	$ 223,695		$ 3,000	28,823	203,718	(11,846)
Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2020	16,469,272		16,469,272
Stockholders' Equity [Roll Forward]
Net income	$ 11,752				11,752	0
Other comprehensive income (loss), net of tax	3,285					3,285
Cash dividends declared, common stock	(3,623)				(3,623)
Stock-based compensation costs	633			633
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, value	(1,213)	$ 0		(1,213)
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, shares			71,109
Balance, Ending at Mar. 31, 2021	$ 234,529		$ 3,000	$ 28,243	$ 211,847	$ (8,561)
Common Stock, Shares, Outstanding, Ending at Mar. 31, 2021	16,540,381		16,540,381
Stockholders' Equity [Roll Forward]
Cash dividends declared per common share	$ 0.22