CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Maximum Cash Obligation Related to ESOP Shares
Beginning Balance at Dec. 31, 2021	$ 438,450	$ 60,938	$ 474,392	$ 1,477	$ (48,344)	$ (50,013)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of 5,339 and 4,589 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	237	189			48
Issuance 1,797 and 1,716 shares of common stock under the employee stock purchase plan for 3 months ended March 31, 2022 and 2023, respectively	110	110
Unearned restricted stock compensation	266	266
Forfeiture of 3,219 and 1,871 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	(175)	(175)
Share-based compensation	6	6
Change related to ESOP shares	(1,926)					(1,926)
Net income	10,652		10,652
Cash dividends 1.00 and $1.05 per share for 3 months ended March 31, 2022 and 2023, respectively	(9,305)		(9,305)
Purchase of 26,412 and 32,682 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	(1,816)				(1,816)
Other comprehensive loss	(22,338)			(22,338)
Ending Balance at Mar. 31, 2022	414,161	61,334	475,739	(20,861)	(50,112)	(51,939)
Beginning Balance at Dec. 31, 2022	428,260	63,220	512,841	(41,060)	(55,730)	(51,011)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of 5,339 and 4,589 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	330	204			126
Issuance 1,797 and 1,716 shares of common stock under the employee stock purchase plan for 3 months ended March 31, 2022 and 2023, respectively	111	111
Unearned restricted stock compensation	42	42
Forfeiture of 3,219 and 1,871 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	(125)	(125)
Share-based compensation	6	6
Change related to ESOP shares	1,207					1,207
Net income	12,462		12,462
Cash dividends 1.00 and $1.05 per share for 3 months ended March 31, 2022 and 2023, respectively	(9,688)		(9,688)
Purchase of 26,412 and 32,682 shares of common stock for 3 months ended March 31, 2022 and 2023, respectively	(2,352)				(2,352)
Other comprehensive loss	6,402			6,402
Ending Balance at Mar. 31, 2023	$ 436,655	$ 63,458	$ 515,615	$ (34,658)	$ (57,956)	$ (49,804)