Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Unearned ESOP Shares	Accumulated Other Comprehensive Loss, Net of Tax
Beginning balance (in shares) at Dec. 31, 2017		11,785,507
Beginning balance at Dec. 31, 2017	$ 177,045	$ 118	$ 111,106	$ 78,602	$ (11,208)	$ (1,573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,105			7,105
Common stock repurchased (in shares)		(623,813)
Common stock repurchased	(10,003)	$ (6)	(6,232)	(3,765)
Restricted stock awards granted net of forfeitures (in shares)		26,400
Restricted stock awards canceled (in shares)		(18,076)
Restricted stock awards canceled	(294)		(294)
Other comprehensive income (loss), net of tax	(3,158)					(3,158)
Share-based compensation	1,053		1,053
Allocation of ESOP shares	851		192		659
Cash dividends declared and paid	$ (335)			(335)
Ending balance (in shares) at Dec. 31, 2018	11,170,018	11,170,018
Ending balance at Dec. 31, 2018	$ 172,264	$ 112	105,825	81,607	(10,549)	(4,731)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,014			9,014
Common stock repurchased (in shares)		(477,837)
Common stock repurchased	(7,830)	$ (5)	(4,774)	(3,051)
Restricted stock awards granted net of forfeitures (in shares)		57,900
Restricted stock awards canceled (in shares)		(18,442)
Restricted stock awards canceled	(305)		(305)
Other comprehensive income (loss), net of tax	3,192					3,192
Share-based compensation	1,062		1,062
Allocation of ESOP shares	868		209		659
Cash dividends declared and paid	$ (1,414)			(1,414)
Ending balance (in shares) at Dec. 31, 2019	10,731,639	10,731,639.000
Ending balance at Dec. 31, 2019	$ 176,851	$ 107	$ 102,017	$ 86,156	$ (9,890)	$ (1,539)