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, 2017				$ (1,152)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			$ 8,259		$ 8,259
Changes in other comprehensive income on investment securities, net of tax and accreation				(1,478)	(1,478)
Dividends on common stock			(1,917)		(1,917)
Issuance of common stock under Stock Incentive Plan	$ 1	$ 353			354
Stock-based compensation expense		75			75
Reclassification from accumulated other comprehensive loss to retained earnings due to adoption of ASU 2018-02				(1,381)
Balance at Mar. 31, 2018	240	305,360	25,324	(2,859)	328,065
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of adoption of ASU 2016-02			229	(229)
Balance at Dec. 31, 2018	240	305,654	44,985	(2,589)	348,290	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,020		6,020
Changes in other comprehensive income on investment securities, net of tax and accreation				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			$ (535)		$ (535)

[1] Derived from audited consolidated financial statements