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
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
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	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
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	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
Balance at Dec. 31, 2019	$ 18,036	140,492	146,696	958	0	0	$ 306,182
Balance (in shares) at Dec. 31, 2019	18,036,115						18,036,115
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	12,698	0	0	0	$ 12,698
Cash dividends, common	0	0	(1,083)	0	0	0	(1,083)
Other comprehensive income (loss), (net of tax)	0	0	0	18,586	0	0	18,586
Exercise of employee stock options and vesting of restricted stock units	$ 28	(157)	0	0	0	0	(129)
Exercise of employee stock options and vesting of restricted stock units (in shares)	27,759
Purchase of treasury stock	$ 0	0	0	0	(61)	0	(61)
Extinguish treasury stock	(5)	(56)	0	0	61	0	$ 0
Extinguish treasury stock (in shares)							(4,700)
Stock-based compensation	0	341	0	0	0	0	$ 341
Balance at Jun. 30, 2020	$ 18,059	140,620	158,311	19,544	0	0	$ 336,534
Balance (in shares) at Jun. 30, 2020	18,059,174						18,059,174
Balance at Mar. 31, 2020	$ 18,056	140,699	153,238	14,897	0	0	$ 326,890
Balance (in shares) at Mar. 31, 2020	18,056,014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	5,615	0	0	0	5,615
Cash dividends, common	0	0	(542)	0	0	0	(542)
Other comprehensive income (loss), (net of tax)	0	0	0	4,647	0	0	4,647
Exercise of employee stock options and vesting of restricted stock units	$ 8	(54)	0	0	0	0	(46)
Exercise of employee stock options and vesting of restricted stock units (in shares)	7,860
Purchase of treasury stock	$ 0	0	0	0	(61)	0	(61)
Extinguish treasury stock	(5)	(56)	0	0	61	0	$ 0
Extinguish treasury stock (in shares)							(4,700)
Stock-based compensation	0	31	0	0	0	0	$ 31
Balance at Jun. 30, 2020	$ 18,059	$ 140,620	$ 158,311	$ 19,544	$ 0	$ 0	$ 336,534
Balance (in shares) at Jun. 30, 2020	18,059,174						18,059,174