CONDENSED HOLDING COMPANY ONLY FINANCIAL STATEMENTS - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on extinguishment of debt	$ 454		$ 740
(Increase) decrease in other assets	9,224	$ 10,332	(35,170)
(Decrease) increase in other liabilities	(23,015)	(45,957)	145,425
Net cash provided by operating activities	99,056	90,874	295,172
Cash flows from investing activities:
Net cash provided by (used in) investing activities	64,125	(214,046)	(1,332,191)
Cash flows from financing activities:
Proceeds from subordinated debentures issuance, net	72,084		157,559
Redemption of subordinated debentures			(155,000)
Proceeds from common stock issuance, net	135,764
Release of stock for benefit plan awards	1,105	1,164	1,167
Payments related to tax withholding for equity awards	(1,347)	(1,258)	(1,558)
Treasury shares repurchased		(947)	(46,762)
Cash dividends paid to preferred stockholders	(7,286)	(7,286)	(7,286)
Cash dividends paid to common stockholders	(38,036)	(37,302)	(36,791)
Net cash provided by financing activities	662,843	411,422	812,594
Increase in cash and cash equivalents	826,024	288,250	(224,425)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	457,547	169,297	393,722
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,283,571	457,547	169,297
Parent Company
Cash flows from operating activities:
Net income	29,084	96,094	152,556
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	11,608	(39,280)	(65,669)
Net accretion	45	(87)	(111)
Loss on extinguishment of debt			740
(Increase) decrease in other assets	(1,863)	(62)	(104)
(Decrease) increase in other liabilities	803	(931)	(1,096)
Net cash provided by operating activities	39,677	55,734	86,316
Cash flows from financing activities:
Proceeds from subordinated debentures issuance, net	72,084		157,559
Redemption of subordinated debentures			(155,000)
Proceeds from common stock issuance, net	135,764
Release of stock for benefit plan awards	1,105	1,164	1,167
Payments related to tax withholding for equity awards	(1,347)	(1,258)	(1,558)
Treasury shares repurchased		(947)	(46,762)
Cash dividends paid to preferred stockholders	(7,286)	(7,286)	(7,286)
Cash dividends paid to common stockholders	(38,036)	(37,302)	(36,791)
Other, net	(141,547)
Net cash provided by financing activities	20,737	(45,629)	(88,671)
Increase in cash and cash equivalents	60,414	10,105	(2,355)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	35,114	25,009	27,364
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 95,528	$ 35,114	$ 25,009