Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)	Unearned Compensation - ESOP	Cumulative Effect, Period of Adoption, Adjustment	Total
Balance at beginning of period at Dec. 31, 2020	$ 584	$ 464,176		$ 277,312	$ (16,644)	$ 2,185	$ (31,299)		$ 696,314
Balance, beginning of period (in shares) at Dec. 31, 2020	57,205,458
Comprehensive income (loss)				45,927		(3,303)			42,624
Dividends declared per share				(7,556)					(7,556)
ESOP shares committed to be released		955					1,378		2,333
Restricted stock awards granted, net of forfeitures (in shares)	185,377
Share-based compensation expense		2,753							2,753
Stock option exercised	$ 1	642							643
Stock option exercised (in shares)	62,840
Treasury stock purchased					(57,079)				(57,079)
Treasury stock purchased (in shares)	(4,221,565)
Balance at end of period at Sep. 30, 2021	$ 585	468,526		315,683	(73,723)	(1,118)	(29,921)		680,032
Balance, end of period (in shares) at Sep. 30, 2021	53,232,110
Balance at beginning of period at Jun. 30, 2021	$ 585	467,194		305,831	(38,588)	829	(30,380)		705,471
Balance, beginning of period (in shares) at Jun. 30, 2021	55,735,623
Comprehensive income (loss)				12,259		(1,947)			10,312
Dividends declared per share				(2,407)					(2,407)
ESOP shares committed to be released		340					459		799
Restricted stock awards forfeited (in shares)	(3,000)
Share-based compensation expense		992							992
Treasury stock purchased					(35,135)				(35,135)
Treasury stock purchased (in shares)	(2,500,513)
Balance at end of period at Sep. 30, 2021	$ 585	468,526		315,683	(73,723)	(1,118)	(29,921)		680,032
Balance, end of period (in shares) at Sep. 30, 2021	53,232,110
Balance at beginning of period at Dec. 31, 2021	$ 585	469,934		325,699	(85,859)	(1,637)	(29,461)		$ 679,261
Balance, beginning of period (in shares) at Dec. 31, 2021	52,390,478								52,390,478
Comprehensive income (loss)				36,012		(47,044)			$ (11,032)
Dividends declared per share				(9,778)					(9,778)
ESOP shares committed to be released		1,078					1,378		2,456
Restricted stock awards granted, net of forfeitures (in shares)	97,971
Performance stock units vested (in shares)	14,596
Share-based compensation expense		2,744							2,744
Stock option exercised	$ 8	6,861							6,869
Stock option exercised (in shares)	722,705
Treasury stock purchased					(57,266)				(57,266)
Treasury stock purchased (in shares)	(4,023,090)
Balance at end of period at Sep. 30, 2022	$ 593	480,617	$ (1,884)	350,049	(143,125)	(48,681)	(28,083)	$ (1,884)	$ 611,370
Balance, end of period (in shares) at Sep. 30, 2022	49,202,660								49,202,660
Balance at beginning of period at Jun. 30, 2022	$ 593	479,519		339,471	(132,296)	(34,267)	(28,542)		$ 624,478
Balance, beginning of period (in shares) at Jun. 30, 2022	49,989,007
Comprehensive income (loss)				13,758		(14,414)			(656)
Dividends declared per share				(3,180)					(3,180)
ESOP shares committed to be released		354					459		813
Restricted stock awards forfeited (in shares)	(2,845)
Share-based compensation expense		744							744
Treasury stock purchased					(10,829)				(10,829)
Treasury stock purchased (in shares)	(783,502)
Balance at end of period at Sep. 30, 2022	$ 593	$ 480,617	$ (1,884)	$ 350,049	$ (143,125)	$ (48,681)	$ (28,083)	$ (1,884)	$ 611,370
Balance, end of period (in shares) at Sep. 30, 2022	49,202,660								49,202,660