Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net of Tax	Unearned ESOP Shares	Total
Beginning balance at Dec. 31, 2017	$ 37	$ 55,135	$ 68,422	$ (475)	$ (1,117)	$ 122,002
Beginning Balance (in shares) at Dec. 31, 2017	3,680,152
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			24,347			24,347
Dividends paid ($0.53 and $0.65 per share for 2018 and 2019, respectively)			(1,915)			(1,915)
Share-based compensation		767				767
Restricted stock awards (in shares)	25,000
Common stock issued	$ 7	33,759				33,766
Common stock issued (in shares)	725,518
Common stock repurchased for employee/director taxes paid on restricted stock awards		(251)				(251)
Common stock repurchased for employee/director taxes paid on restricted stock awards (in shares)	(4,325)
Stock options exercised	$ 1	1,116				1,117
Stock options shares exercised (in shares)	66,133
Other comprehensive income (loss), net of tax				(1,004)		(1,004)
ESOP shares allocated		940			269	1,209
Ending balance at Dec. 31, 2018	$ 45	91,466	90,854	(1,479)	(848)	180,038
Ending Balance (in shares) at Dec. 31, 2018	4,492,478
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			22,717			22,717
Dividends paid ($0.53 and $0.65 per share for 2018 and 2019, respectively)			(2,856)			(2,856)
Share-based compensation		869				869
Restricted stock awards (in shares)	20,215
Common stock repurchased for employee/director taxes paid on restricted stock awards		(204)				(204)
Common stock repurchased for employee/director taxes paid on restricted stock awards (in shares)	(4,037)
Common stock repurchased	$ (1)	(4,799)				(4,800)
Common stock repurchased (in shares)	(102,384)
Stock options exercised		705				705
Stock options shares exercised (in shares)	52,769
Other comprehensive income (loss), net of tax				2,267		2,267
ESOP shares allocated		1,231			275	1,506
Ending balance at Dec. 31, 2019	$ 44	$ 89,268	$ 110,715	$ 788	$ (573)	$ 200,242
Ending Balance (in shares) at Dec. 31, 2019	4,459,041