CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect of change in accounting principal (ASU 2023-02)	Preferred	Common stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative effect of change in accounting principal (ASU 2023-02)	AOCI	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2023			0	55,244,119
Beginning balance at Dec. 31, 2023	$ 1,271,981	$ (1,391)	$ 0	$ 58	$ 1,323,595	$ 237,197	$ (1,391)	$ (218,803)	$ (70,066)
Increase (decrease) in shareholders' equity
Net income	85,586					85,586
OCI, net of tax	47,890							47,890
Stock issued in acquisition, net of stock issuance costs (in shares)				1,429,304
Stock issued in acquisition, net of stock issuance costs	34,234			$ 2	34,232
Issuance of treasury stock for ESPP (in shares)				45,679
Issuance of treasury stock for ESPP	926				(250)				1,176
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax (in shares)				153,087
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax	(1,650)				(5,592)				3,942
Net issuance of treasury stock for SSARs and options exercised net of shares redeemed and related tax (in shares)				52
Net issuance of treasury stock for SSARs and options exercised, net of shares redeemed and related tax	0				(1)				1
Cash dividends on common stock	(40,520)					(40,520)
Dividend equivalents on RSUs/PSUs/DSUs	0				1,004	(1,004)
Stock-based compensation	5,828				5,828
Ending balance (in shares) at Sep. 30, 2024			0	56,872,241
Ending balance at Sep. 30, 2024	1,402,884		$ 0	$ 60	1,358,816	279,868		(170,913)	(64,947)
Beginning balance (in shares) at Jun. 30, 2024			0	56,746,937
Beginning balance at Jun. 30, 2024	1,333,810		$ 0	$ 60	1,360,430	261,820		(220,326)	(68,174)
Increase (decrease) in shareholders' equity
Net income	32,004					32,004
OCI, net of tax	49,413							49,413
Issuance of treasury stock for ESPP (in shares)				13,109
Issuance of treasury stock for ESPP	265				(73)				338
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax (in shares)				112,143
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax	(1,254)				(4,142)				2,888
Net issuance of treasury stock for SSARs and options exercised net of shares redeemed and related tax (in shares)				52
Net issuance of treasury stock for SSARs and options exercised, net of shares redeemed and related tax	0				(1)				1
Cash dividends on common stock	(13,645)					(13,645)
Dividend equivalents on RSUs/PSUs/DSUs	0				311	(311)
Stock-based compensation	2,291				2,291
Ending balance (in shares) at Sep. 30, 2024			0	56,872,241
Ending balance at Sep. 30, 2024	1,402,884		$ 0	$ 60	1,358,816	279,868		(170,913)	(64,947)
Beginning balance (in shares) at Dec. 31, 2024			0	56,895,981
Beginning balance at Dec. 31, 2024	1,383,269		$ 0	$ 60	1,360,530	294,054		(207,039)	(64,336)
Increase (decrease) in shareholders' equity
Net income	74,512					74,512
OCI, net of tax	70,238							70,238
Stock issued in acquisition, net of stock issuance costs (in shares)			7,750	33,148,268
Stock issued in acquisition, net of stock issuance costs	808,055			$ 33	808,022
Issuance of preferred stock, net of issuance costs (in shares)			215,000
Issuance of preferred stock, net of issuance costs	207,447				207,447
Repurchase of stock (in shares)				(1,812,000)
Repurchase of stock	(40,038)								(40,038)
Issuance of treasury stock for ESPP (in shares)				79,333
Issuance of treasury stock for ESPP	1,487				(424)				1,911
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax (in shares)				446,555
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax	(4,549)				(15,256)				10,707
Net issuance of treasury stock for SSARs and options exercised net of shares redeemed and related tax (in shares)				30,906
Net issuance of treasury stock for SSARs and options exercised, net of shares redeemed and related tax	(452)				(1,174)				722
Cash dividends on preferred stock	(5,286)					(5,286)
Cash dividends on common stock	(58,973)					(58,973)
Dividend equivalents on RSUs/PSUs/DSUs	0				1,230	(1,230)
Stock-based compensation	13,125				13,125
Ending balance (in shares) at Sep. 30, 2025			222,750	88,789,043
Ending balance at Sep. 30, 2025	2,448,835		$ 0	$ 93	2,373,500	303,077		(136,801)	(91,034)
Beginning balance (in shares) at Jun. 30, 2025			222,750	89,104,678
Beginning balance at Jun. 30, 2025	2,412,546		$ 0	$ 93	2,377,560	273,799		(155,311)	(83,595)
Increase (decrease) in shareholders' equity
Net income	57,098					57,098
OCI, net of tax	18,510							18,510
Repurchase of stock (in shares)				(580,000)
Repurchase of stock	(13,547)								(13,547)
Issuance of treasury stock for ESPP (in shares)				23,232
Issuance of treasury stock for ESPP	458				(79)				537
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax (in shares)				234,401
Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax	(3,002)				(8,418)				5,416
Net issuance of treasury stock for SSARs and options exercised net of shares redeemed and related tax (in shares)				6,732
Net issuance of treasury stock for SSARs and options exercised, net of shares redeemed and related tax	(88)				(243)				155
Cash dividends on preferred stock	(5,131)					(5,131)
Cash dividends on common stock	(22,307)					(22,307)
Dividend equivalents on RSUs/PSUs/DSUs	0				382	(382)
Stock-based compensation	4,298				4,298
Ending balance (in shares) at Sep. 30, 2025			222,750	88,789,043
Ending balance at Sep. 30, 2025	$ 2,448,835		$ 0	$ 93	$ 2,373,500	$ 303,077		$ (136,801)	$ (91,034)