Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES
Net income	$ 152,693	$ 175,057	$ 256,412
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,116	47,877	48,962
Provision for credit losses	46,785	42,028	14,074
Loss on sale of investments	28,393	20,609	278
Net amortization (accretion) of investment securities and assets	16,605	14,982	(39,031)
Net amortization on borrowings	152	152	313
Stock-based compensation expense	11,290	12,189	15,317
Gain on sale of foreclosed assets and other real estate owned	(928)	(182)	(390)
Gain on sale of mortgage loans held for sale	(8,302)	(7,981)	(16,699)
Loss (gain) on sale of loans	234	0	(282)
Deferred income taxes	(3,233)	(2,460)	14,933
Income from bank owned life insurance	(15,578)	(12,905)	(11,164)
Loss from early retirement of TruPS	0	0	365
Originations of mortgage loans held for sale	(277,450)	(262,901)	(497,815)
Proceeds from sale of mortgage loans held for sale	283,708	264,995	547,384
Changes in assets and liabilities:
Interest receivable	(813)	(19,538)	(22,107)
Other assets	101,288	263,969	(7,214)
Accrued interest and other liabilities	53,195	(3,908)	10,417
Income taxes payable	(8,231)	8,996	8,445
Net cash provided by operating activities	425,924	540,979	322,198
INVESTING ACTIVITIES
Net change in loans	(214,188)	(786,775)	(1,900,325)
Proceeds from sale of loans	13,044	69,760	73,746
Decrease in due from banks - time	0	695	1,087
Purchases of premises and equipment, net	(45,509)	(33,086)	(35,268)
Proceeds from sale of foreclosed assets and other real estate owned	5,428	2,071	4,754
Proceeds from sale of available-for-sale securities	251,517	247,948	0
Proceeds from maturities of available-for-sale securities	300,466	302,802	1,137,923
Purchases of available-for-sale securities	(7,071)	(7,518)	(261,375)
Proceeds from maturities of held-to-maturity securities	81,488	85,192	86,229
Purchases of held-to-maturity securities	0	(68,368)	(331,273)
Proceeds from bank owned life insurance death benefits	1,376	3,686	1,873
Purchases of bank owned life insurance	(24,528)	0	0
Surrender of bank owned life insurance	7,484	0	0
Cash received in business combinations, net	0	0	276,396
Net cash provided by (used in) investing activities	369,507	(183,593)	(946,233)
FINANCING ACTIVITIES
Net change in deposits	(359,228)	(302,747)	462,530
Proceeds from issuance of other borrowed funds	3,375,000	3,725,000	1,160,000
Repayments of other borrowed funds	(3,601,994)	(3,611,930)	(1,676,726)
Repayments of subordinated debentures	0	0	(56,189)
Dividends paid on common stock	(105,439)	(100,962)	(94,096)
Net change in federal funds purchased and securities sold under agreements to repurchase	(30,860)	(92,434)	(25,000)
Net shares cancelled under stock compensation plans	(595)	(2,854)	(5,033)
Shares issued under employee stock purchase plan	970	833	1,151
Repurchase of common stock	0	(40,322)	(111,133)
Net cash used in financing activities	(722,146)	(425,416)	(344,496)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	73,285	(68,030)	(968,531)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	614,092	682,122	1,650,653
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 687,377	$ 614,092	$ 682,122