Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net income (loss)	$ (397,553)	$ 152,693	$ 175,057
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,802	46,116	47,877
Provision for credit losses	65,824	46,785	42,028
Loss on sale of investments	801,492	28,393	20,609
Net amortization of investment securities and assets	11,886	16,605	14,982
Net amortization on borrowings	257	152	152
Stock-based compensation expense	10,763	11,290	12,189
Gain on sale of foreclosed assets and other real estate owned	(500)	(928)	(182)
Gain on sale of mortgage loans held for sale	(8,229)	(8,302)	(7,981)
(Gain) loss on sale of loans	(109)	234	0
Loss on early extinguishment of debt	565	0	0
Deferred income taxes	(153,519)	(3,233)	(2,460)
Income from bank owned life insurance	(19,192)	(15,578)	(12,905)
Originations of mortgage loans held for sale	(280,597)	(277,450)	(262,901)
Proceeds from sale of mortgage loans held for sale	282,805	283,708	264,995
Changes in assets and liabilities:
Interest receivable	19,181	(813)	(19,538)
Assets held in trading accounts	(11,685)	0	0
Other assets	90,537	101,288	263,969
Accrued interest and other liabilities	2,145	53,195	(3,908)
Income taxes payable	(5,993)	(8,231)	8,996
Net cash provided by operating activities	449,503	425,924	540,979
INVESTING ACTIVITIES
Net change in loans	(708,627)	(214,188)	(786,775)
Proceeds from sale of loans	121,788	13,044	69,760
Proceeds from sale of closed branches	18,843	0	0
Decrease in due from banks - time	0	0	695
Purchases of premises and equipment, net	(38,141)	(45,509)	(33,086)
Proceeds from sale of foreclosed assets and other real estate owned	11,497	5,428	2,071
Proceeds from sale of available-for-sale securities	2,363,220	251,517	247,948
Proceeds from maturities of available-for-sale securities	337,593	300,466	302,802
Purchases of available-for-sale securities	(597,219)	(7,071)	(7,518)
Proceeds from maturities of held-to-maturity securities	41,009	81,488	85,192
Purchases of held-to-maturity securities	0	0	(68,368)
Proceeds from bank owned life insurance death benefits	7,669	1,376	3,686
Purchases of bank owned life insurance	(15,697)	(24,528)	0
Surrender of bank owned life insurance	19,025	7,484	0
Sale of equipment finance business	11,198	0	0
Net cash provided by (used in) investing activities	1,572,158	369,507	(183,593)
FINANCING ACTIVITIES
Net change in deposits	(1,701,712)	(359,228)	(302,747)
Proceeds from issuance of other borrowed funds	1,765,000	3,375,000	3,725,000
Proceeds from issuance of subordinated notes	321,054	0	0
Repayments of other borrowed funds	(2,208,119)	(3,601,994)	(3,611,930)
Repayments of subordinated debentures	(367,000)	0	0
Dividends paid on common stock	(115,041)	(105,439)	(100,962)
Net change in federal funds purchased and securities sold under agreements to repurchase	(15,726)	(30,860)	(92,434)
Issuance of common stock	327,107	0	0
Net shares cancelled under stock compensation plans	(3,524)	(595)	(2,854)
Shares issued under employee stock purchase plan	836	970	833
Repurchase of common stock	0	0	(40,322)
Net cash used in financing activities	(1,997,125)	(722,146)	(425,416)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	24,536	73,285	(68,030)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	687,377	614,092	682,122
CASH AND CASH EQUIVALENTS, END OF YEAR	711,913	687,377	614,092
Closed Branches
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of closed branches	(495)	0	0
Equipment Finance Business
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of closed branches	$ 1,118	$ 0	$ 0