CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020	$ 805,464,000	$ 10,438,000	$ 384,000	$ 587,165,000	$ 191,098,000	$ (1,668,000)	$ 18,047,000
Beginning balance, shares at Dec. 31, 2020		10,438	38,618,054
Net income	21,798,000				21,798,000
Other comprehensive income loss, net of tax	(26,394,000)						(26,394,000)
Issuance of common stock upon exercise of stock options	751,000		$ 1,000	750,000
Issuance of common stock upon exercise of stock options, shares			55,908
Restricted stock activity, net	(244,000)					(244,000)
Restricted stock activity, shares			274,739
Issuance of common stock in connection with employee stock purchase plan	515,000			515,000
Issuance of common stock in connection with employee stock purchase plan, shares			25,894
Cash dividends declared on preferred stock	(196,000)				(196,000)
Cash dividends declared on common stock	(2,315,000)				(2,315,000)
Repurchase of common stock	(6,363,000)		$ (332,744,000)			(6,363,000)
Share-based compensation expense	779,000			779,000
Ending balance at Mar. 31, 2021	793,795,000	$ 10,438,000	$ 385,000	589,209,000	210,385,000	(8,275,000)	(8,347,000)
Ending balance, shares at Mar. 31, 2021		10,438	38,641,851
Beginning balance at Dec. 31, 2020	805,464,000	$ 10,438,000	$ 384,000	587,165,000	191,098,000	(1,668,000)	18,047,000
Beginning balance, shares at Dec. 31, 2020		10,438	38,618,054
Net income	50,290,000
Other comprehensive income loss, net of tax	(17,870,000)						(17,870,000)
Repurchase of common stock	$ (18,500,000)
Repurchase of common stock, shares	(871,488)
Ending balance at Jun. 30, 2021	$ 817,073,000	$ 10,438,000	$ 385,000	590,422,000	236,363,000	(20,712,000)	177,000
Ending balance, shares at Jun. 30, 2021		10,438	38,094,972
Beginning balance at Dec. 31, 2020	805,464,000	$ 10,438,000	$ 384,000	587,165,000	191,098,000	(1,668,000)	18,047,000
Beginning balance, shares at Dec. 31, 2020		10,438	38,618,054
Ending balance at Dec. 31, 2021	836,382,000	$ 10,438,000	$ 387,000	593,753,000	271,676,000	(31,570,000)	(8,302,000)
Ending balance, shares at Dec. 31, 2021		10,438	37,713,903
Beginning balance at Mar. 31, 2021	793,795,000	$ 10,438,000	$ 385,000	589,209,000	210,385,000	(8,275,000)	(8,347,000)
Beginning balance, shares at Mar. 31, 2021		10,438	38,641,851
Net income	28,492,000				28,492,000
Other comprehensive income loss, net of tax	8,524,000						8,524,000
Issuance of common stock upon exercise of stock options	135,000			135,000
Issuance of common stock upon exercise of stock options, shares			11,031
Restricted stock activity, net	(344,000)					(344,000)
Restricted stock activity, shares			19,166
Cash dividends declared on preferred stock	(195,000)				(195,000)
Cash dividends declared on common stock	(2,319,000)				(2,319,000)
Repurchase of common stock	$ (12,093,000)					(12,093,000)
Repurchase of common stock, shares	(538,744)		(538,744)
Share-based compensation expense	$ 1,078,000			1,078,000
Ending balance at Jun. 30, 2021	817,073,000	$ 10,438,000	$ 385,000	590,422,000	236,363,000	(20,712,000)	177,000
Ending balance, shares at Jun. 30, 2021		10,438	38,094,972
Net income	25,306,000				25,306,000
Other comprehensive income loss, net of tax	(5,691,000)						(5,691,000)
Issuance of common stock upon exercise of stock options	283,000			283,000
Issuance of common stock upon exercise of stock options, shares			25,866
Restricted stock activity, net	(38,000)		$ 1,000	(1,000)		(38,000)
Restricted stock activity, shares			12,879
Issuance of common stock in connection with employee stock purchase plan	408,000			408,000
Issuance of common stock in connection with employee stock purchase plan, shares			16,590
Cash dividends declared on preferred stock	(196,000)				(196,000)
Cash dividends declared on common stock	(3,396,000)				(3,396,000)
Repurchase of common stock	(10,411,000)					(10,411,000)
Repurchase of common stock, shares			(460,220)
Share-based compensation expense	1,080,000			1,080,000
Ending balance at Sep. 30, 2021	824,418,000	$ 10,438,000	$ 386,000	592,192,000	258,077,000	(31,161,000)	(5,514,000)
Ending balance, shares at Sep. 30, 2021		10,438	37,690,087
Net income	17,189,000				17,189,000
Other comprehensive income loss, net of tax	(2,788,000)						(2,788,000)
Issuance of common stock upon exercise of stock options	287,000			187,000		100,000
Issuance of common stock upon exercise of stock options, shares			23,092
Restricted stock activity, net	(509,000)					(509,000)
Restricted stock activity, shares			9,994
Issuance of common stock in connection with employee stock purchase plan	294,000		$ 1,000	293,000
Issuance of common stock in connection with employee stock purchase plan, shares			10,718
Cash dividends declared on preferred stock	(196,000)				(196,000)
Cash dividends declared on common stock	(3,394,000)				(3,394,000)
Share-based compensation expense	1,081,000			1,081,000
Ending balance at Dec. 31, 2021	836,382,000	$ 10,438,000	$ 387,000	593,753,000	271,676,000	(31,570,000)	(8,302,000)
Ending balance, shares at Dec. 31, 2021		10,438	37,713,903
Net income	22,311,000				22,311,000
Other comprehensive income loss, net of tax	(48,086,000)						(48,086,000)
Issuance of common stock upon exercise of stock options	(881,000)			(9,000)		(872,000)
Issuance of common stock upon exercise of stock options, shares			117,254
Restricted stock activity, net	(700,000)		$ 1,000	(1,000)		(700,000)
Restricted stock activity, shares			263,283
Return of common stock in connection with employee stock purchase plan	(1,000)			(1,000)
Return of common stock in connection with employee stock purchase plan, Shares			(39)
Redemption of preferred stock, Shares		(10,438)
Redemption of preferred stock	(10,438,000)	$ (10,438,000)
Cash dividends declared on preferred stock	(196,000)				(196,000)
Cash dividends declared on common stock	(3,394,000)				(3,394,000)
Repurchase of common stock	(7,590,000)					(7,590,000)
Repurchase of common stock, shares			(282,819)
Share-based compensation expense	1,264,000			1,264,000
Ending balance at Mar. 31, 2022	788,671,000		$ 388,000	595,006,000	290,397,000	(40,732,000)	(56,388,000)
Ending balance, shares at Mar. 31, 2022			37,811,582
Beginning balance at Dec. 31, 2021	836,382,000	$ 10,438,000	$ 387,000	593,753,000	271,676,000	(31,570,000)	(8,302,000)
Beginning balance, shares at Dec. 31, 2021		10,438	37,713,903
Net income	42,594,000
Other comprehensive income loss, net of tax	(82,960,000)						(82,960,000)
Repurchase of common stock	$ (13,100,000)
Repurchase of common stock, shares	(514,819)
Ending balance at Jun. 30, 2022	$ 765,161,000		$ 388,000	595,938,000	307,278,000	(47,181,000)	(91,262,000)
Ending balance, shares at Jun. 30, 2022			37,669,102
Beginning balance at Mar. 31, 2022	788,671,000		$ 388,000	595,006,000	290,397,000	(40,732,000)	(56,388,000)
Beginning balance, shares at Mar. 31, 2022			37,811,582
Net income	20,283,000				20,283,000
Other comprehensive income loss, net of tax	(34,874,000)						(34,874,000)
Issuance of common stock upon exercise of stock options	(1,529,000)			(590,000)		(939,000)
Issuance of common stock upon exercise of stock options, shares			86,001
Restricted stock activity, net	(549,000)			(31,000)		(518,000)
Restricted stock activity, shares			(19,046)
Issuance of common stock in connection with employee stock purchase plan	537,000					537,000
Issuance of common stock in connection with employee stock purchase plan, shares			22,565
Cash dividends declared on common stock	(3,402,000)				3,402,000
Repurchase of common stock	$ (5,529,000)					5,529,000
Repurchase of common stock, shares	(232,000)		232,000
Share-based compensation expense	$ 1,553,000			1,553,000
Ending balance at Jun. 30, 2022	$ 765,161,000		$ 388,000	$ 595,938,000	$ 307,278,000	$ (47,181,000)	$ (91,262,000)
Ending balance, shares at Jun. 30, 2022			37,669,102