Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands		Common Stock		Additional Paid-in Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation - ESOP	Total
Balance at beginning of period at Dec. 31, 2018		$ 327		$ 152,156	$ 219,088	$ (1,548)	$ (2,358)	$ (10,091)	$ 357,574
Balance, beginning of period (in shares) at Dec. 31, 2018	[1]	58,465,505
Comprehensive income					6,848		3,824		10,672
ESOP shares committed to be released				212				298	510
Restricted stock awards forfeited, net of awards issued (in shares)	[1]	17,520
Share-based compensation expense				2,362					2,362
Balance at end of period at Jun. 30, 2019		$ 327		154,730	225,936	(1,548)	1,466	(9,793)	371,118
Balance, end of period (in shares) at Jun. 30, 2019	[1]	58,483,025
Balance at beginning of period at Mar. 31, 2019		$ 327		153,326	221,155	(1,548)	130	(9,942)	363,448
Balance, beginning of period (in shares) at Mar. 31, 2019	[1]	58,459,493
Comprehensive income					4,781		1,336		6,117
ESOP shares committed to be released				122				149	271
Restricted stock awards forfeited, net of awards issued (in shares)	[1]	23,532
Share-based compensation expense				1,282					1,282
Balance at end of period at Jun. 30, 2019		$ 327		154,730	225,936	(1,548)	1,466	(9,793)	371,118
Balance, end of period (in shares) at Jun. 30, 2019	[1]	58,483,025
Balance at beginning of period at Dec. 31, 2019		$ 584		460,232	237,356	(721)	1,480	(33,137)	$ 665,794
Balance, beginning of period (in shares) at Dec. 31, 2019		58,418,021	[1]						58,418,021
Comprehensive income					15,299		1,417		$ 16,716
Dividends declared					(1,623)				(1,623)
ESOP shares committed to be released				123				919	1,042
Share-based compensation expense				2,526					2,526
Balance at end of period at Jun. 30, 2020		$ 584		462,881	251,032	(721)	2,897	(32,218)	$ 684,455
Balance, end of period (in shares) at Jun. 30, 2020		58,418,021	[1]						58,418,021
Balance at beginning of period at Mar. 31, 2020		$ 584		461,616	242,080	(721)	4,258	(32,678)	$ 675,139
Balance, beginning of period (in shares) at Mar. 31, 2020	[1]	58,418,021
Comprehensive income					10,575		(1,361)		9,214
Dividends declared					(1,623)				(1,623)
ESOP shares committed to be released				2				460	462
Share-based compensation expense				1,263					1,263
Balance at end of period at Jun. 30, 2020		$ 584		$ 462,881	$ 251,032	$ (721)	$ 2,897	$ (32,218)	$ 684,455
Balance, end of period (in shares) at Jun. 30, 2020		58,418,021	[1]						58,418,021

[1] Share amounts related to periods prior to the August 14, 2019 closing of the conversion offering have been restated to give retroactive recognition to the 1.795431 exchange ratio applied in the conversion offering (see Note 1).