CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Less: ESOP Owned Shares [Member]	Total
Balance at Dec. 31, 2017	$ 15,154	$ 85,888	$ 120,589	$ (446)	$ (5,858)	$ (57,121)	$ 158,206
Balance (in shares) at Dec. 31, 2017	15,153,510
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	18,514	0	0	0	18,514
Cash dividends, common	0	0	(17,544)	0	0	0	(17,544)
Other comprehensive income (loss), (net of tax)	0	0	0	(3,201)	0	0	(3,201)
Balance at Jun. 30, 2018	$ 15,154	85,888	121,559	(3,647)	(5,858)	(57,121)	155,975
Balance (in shares) at Jun. 30, 2018	15,153,510
Balance at Mar. 31, 2018	$ 15,154	85,888	123,875	(3,606)	(5,858)	(57,121)	158,332
Balance (in shares) at Mar. 31, 2018	15,153,510
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	13,013	0	0	0	13,013
Cash dividends, common	0	0	(15,329)	0	0	0	(15,329)
Other comprehensive income (loss), (net of tax)	0	0	0	(41)	0	0	(41)
Balance at Jun. 30, 2018	$ 15,154	85,888	121,559	(3,647)	(5,858)	(57,121)	155,975
Balance (in shares) at Jun. 30, 2018	15,153,510
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative change in accounting principle	$ 0	0	(1,279)	0	0	0	(1,279)
Balance at Dec. 31, 2018	$ 14,772	80,412	119,834	(2,243)	0	(58,195)	$ 154,580
Balance (in shares) at Dec. 31, 2018	14,771,520						14,771,520
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net	$ 3,207	48,185	0	0	0	0	$ 51,392
Issuance of common stock, net (in shares)	3,207,000
Net income	$ 0	0	10,853	0	0	0	10,853
Other comprehensive income (loss), (net of tax)	0	0	0	5,780	0	0	5,780
Terminated ESOP put option	0	0	0	0	0		58,195
Stock based compensation	0	142	0	0	0	0	142
Share-based liability awards modified to equity awards	0	11,450	0	0	0	0	11,450
Balance at Jun. 30, 2019	$ 17,979	140,189	129,408	3,537	0	0	$ 291,113
Balance (in shares) at Jun. 30, 2019	17,978,520						17,978,520
Balance at Mar. 31, 2019	$ 14,772	80,412	123,328	53	0	(58,195)	$ 160,370
Balance (in shares) at Mar. 31, 2019	14,771,520
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net	$ 3,207	48,185	0	0	0	0	51,392
Issuance of common stock, net (in shares)	3,207,000
Net income	$ 0	0	6,080	0	0	0	6,080
Other comprehensive income (loss), (net of tax)	0	0	0	3,484	0	0	3,484
Terminated ESOP put option	0	0	0	0	0		58,195
Stock based compensation	0	142	0	0	0	0	142
Share-based liability awards modified to equity awards	0	11,450	0	0	0	0	11,450
Balance at Jun. 30, 2019	$ 17,979	$ 140,189	$ 129,408	$ 3,537	$ 0	$ 0	$ 291,113
Balance (in shares) at Jun. 30, 2019	17,978,520						17,978,520