CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities
Net income	$ 132,495	$ 116,141
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	15,000	8,100
Depreciation, amortization and accretion, net	17,770	18,735
Deferred income tax (benefit) provision	(3,593)	3,464
Stock-based compensation	7,561	6,549
Gain on property insurance proceeds		(2,559)
Other losses (gains)	6	(52)
Originations of loans held for sale	(6,818)	(20,181)
Proceeds from sales of loans held for sale	6,715	17,481
Net gains on investment securities	(37)
Premium paid on cash flow hedge	(1,006)
Amortization of premium on cash flow hedge	74
Change in assets and liabilities:
Net decrease in other assets	15,081	7,317
Net decrease in other liabilities	(10,158)	(10,182)
Net cash provided by operating activities	173,090	144,813
Available-for-sale securities:
Proceeds from maturities and principal repayments	144,154	145,037
Proceeds from calls and sales	36,835	32,500
Purchases	(74,812)
Held-to-maturity securities:
Proceeds from maturities and principal repayments	144,482	141,502
Proceeds from calls	3,848	1,250
Other investments:
Proceeds from sales	413	3,324
Purchases	(15,396)	(21,750)
Loans:
Net decrease in loans and leases resulting from originations and principal repayments	52,488	8,477
Proceeds from sales of loans originated for investment		27,526
Purchases of loans	(3,995)	(17,995)
Proceeds from bank-owned life insurance	693	1,292
Purchases of bank-owned life insurance	(2,000)
Proceeds from property insurance		2,559
Purchases of premises, equipment and software	(19,310)	(10,848)
Proceeds from sales of other real estate owned		104
Other	(8)
Net cash provided by investing activities	267,392	312,978
Cash flows from financing activities
Net decrease in deposits	(90,797)	(1,013,825)
Dividends paid	(66,488)	(66,406)
Stock tendered for payment of withholding taxes	(4,011)	(2,698)
Common stock repurchased	(50,000)
Stock repurchase excise tax paid in current period	(341)
Net cash used in financing activities	(211,637)	(1,082,929)
Net increase (decrease) in cash and cash equivalents	228,845	(625,138)
Cash and cash equivalents at beginning of period	1,170,190	1,739,897
Cash and cash equivalents at end of period	1,399,035	1,114,759
Supplemental disclosures
Interest paid	153,752	178,718
Income taxes paid, net of income tax refunds	12,040	26,817
Noncash investing and financing activities:
Available-for-sale securities purchases accrued but unpaid	14,000
Transfers from loans and leases and other assets to other real estate owned		69
Operating lease right-of-use assets obtained in exchange for new lease obligations	1,390
Transfers to loans held for sale from loans and leases		27,526
Obligation to fund low-income housing partnerships	41,121	$ 30,685
Stock repurchase excise tax settled in subsequent period	$ 426