CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net income	$ 116,141	$ 129,260
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	8,100	13,800
Depreciation, amortization and accretion, net	18,735	21,985
Deferred income tax provision (benefit)	3,464	(2,024)
Stock-based compensation	6,549	4,730
Gain on property insurance proceeds	(2,559)
Other (gains) losses	(52)	1,122
Originations of loans held for sale	(20,181)	(5,613)
Proceeds from sales of loans held for sale	17,481	6,726
Net losses on sales of loans originated for investment and held for sale		20
Change in assets and liabilities:
Net decrease in other assets	7,317	29,087
Net decrease in other liabilities	(10,182)	(11,483)
Net cash provided by operating activities	144,813	187,610
Available-for-sale securities:
Proceeds from maturities and principal repayments	145,037	223,102
Proceeds from calls and sales	32,500	25,237
Held-to-maturity securities:
Proceeds from maturities and principal repayments	141,502	153,133
Proceeds from calls	1,250	7,705
Other investments:
Proceeds from sales	3,324	61,985
Purchases	(21,750)	(81,240)
Loans:
Net decrease (increase) in loans and leases resulting from originations and principal repayments	8,477	(240,357)
Proceeds from sales of loans originated for investment	27,526
Purchases of loans	(17,995)	(48,741)
Proceeds from bank-owned life insurance	1,292	5,281
Proceeds from property insurance	2,559
Purchases of premises, equipment and software	(10,848)	(4,191)
Proceeds from sales of other real estate owned	104	34
Other		(2,882)
Net cash provided by investing activities	312,978	99,066
Cash flows from financing activities
Net decrease in deposits	(1,013,825)	(610,863)
Net decrease in short-term borrowings		(75,000)
Proceeds from long-term borrowings		500,000
Dividends paid	(66,406)	(66,290)
Stock tendered for payment of withholding taxes	(2,698)	(3,179)
Proceeds from employee stock purchase plan		163
Net cash used in financing activities	(1,082,929)	(255,169)
Net (decrease) increase in cash and cash equivalents	(625,138)	31,507
Cash and cash equivalents at beginning of year	1,739,897	526,624
Cash and cash equivalents at end of year	1,114,759	558,131
Supplemental disclosures
Interest paid	178,718	97,867
Income taxes paid, net of income tax refunds	26,817	29,928
Noncash investing and financing activities:
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		1,680
Transfers to loans held for sale from loans and leases	27,526	$ 1,133
Obligation to fund low-income housing partnerships	$ 30,685