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, 2018	$ 191,023	$ 0	$ 3,000	$ 25,128	$ 169,709	$ (6,814)
Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2018			16,295,494
Stockholders' Equity [Roll Forward]
Net income	6,899				6,899
Other comprehensive income (loss), net of tax	1,837					1,837
Cash dividends declared, common stock	(3,259)				(3,259)
Stock-based compensation costs	631			631
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, value	(861)	0	$ 0	(861)	0	0
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for payroll taxes, shares			62,258
Balance, Ending at Mar. 31, 2019	196,270		$ 3,000	24,898	173,349	(4,977)
Common Stock, Shares, Outstanding, Ending at Mar. 31, 2019			16,357,752
Balance, Beginning at Dec. 31, 2019	$ 211,820		$ 3,000	27,260	184,821	(3,261)
Common Stock, Shares, Outstanding, Beginning at Dec. 31, 2019	16,379,752		16,379,752
Stockholders' Equity [Roll Forward]
Net income	$ 8,089				8,089	0
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		(749)
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		16,447,272.000