CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2018	$ 240	$ 305,654	$ 44,985	$ (2,589)	$ 348,290
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,020		6,020
Changes in other comprehensive income (loss) on investment securities, net of tax and accretion				858	858
Dividends on common stock			(2,170)		(2,170)
Issuance of common stock under Stock Incentive Plan	1	121			122
Stock-based compensation expense		104			104
Balance at Mar. 31, 2019	241	305,879	48,300	(1,731)	352,689
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of adoption of ASU 2016-02 | Accounting Standards Update 2016-02 [Member]			(535)		(535)
Balance at Dec. 31, 2019	241	306,755	69,462	783	377,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			27		27
Changes in other comprehensive income (loss) on investment securities, net of tax and accretion				2,384	2,384
Dividends on common stock			(2,428)		(2,428)
Issuance of common stock under Stock Incentive Plan	1	193			194
Stock-based compensation expense		1,404			1,404
Balance at Mar. 31, 2020	$ 242	$ 308,352	$ 67,061	$ 3,167	$ 378,822