Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Unallocated ESOP Shares [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2017		$ 53	$ 42,780	$ (643)	$ (2,826)	$ 43,939	$ 313	$ 83,616
Net income						3,538		3,538
Other comprehensive income (loss)							(2,950)	(2,950)
Dividends paid						(1,488)		(1,488)
ESOP shares allocated			121	125				246
Stock issued in connection with acquisition		4	9,026					9,030
Balance at Sep. 30, 2018		57	51,927	(518)	(2,826)	45,989	(2,637)	91,992
Balance at Jun. 30, 2018		57	51,890	(559)	(2,826)	44,862	(1,619)	91,805
Net income						1,632		1,632
Other comprehensive income (loss)							(1,018)	(1,018)
Dividends paid						(505)		(505)
ESOP shares allocated			37	41				78
Balance at Sep. 30, 2018		57	51,927	(518)	(2,826)	45,989	(2,637)	91,992
Balance at Dec. 31, 2018		57	52,051	(477)	(2,640)	46,926	(1,111)	94,806
Net income						8,535		8,535
Other comprehensive income (loss)							3,138	3,138
Dividends paid						(1,797)		(1,797)
Stock compensation expense			330					330
ESOP shares allocated			88	125				213
Stock issued in connection with acquisition		10	16,425					16,435
Treasury stock purchased					(1,210)			(1,210)
Balance at Sep. 30, 2019		67	68,894	(352)	(3,850)	53,664	2,027	120,450
Balance at Jun. 30, 2019		67	68,535	(393)	(3,850)	50,167	1,168	115,694
Net income						4,105		4,105
Other comprehensive income (loss)							859	859
Dividends paid						(608)		(608)
Stock compensation expense			330					330
ESOP shares allocated			29	41				70
Balance at Sep. 30, 2019		$ 67	$ 68,894	$ (352)	$ (3,850)	$ 53,664	$ 2,027	$ 120,450