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	$ 223,169	$ 244,261
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,369	17,514
Provision for credit losses	21,691	13,653
Gain on other real estate and foreclosed assets	(1,590)	(324)
Deferred tax (benefit) expense	(2,221)	8,450
Increase cash surrender value of life insurance contracts	(13,804)	(7,466)
(Gain) Loss on disposal of assets	(1,374)	651
Net increase in loans held for sale	(1,019)	(29,454)
Net amortization of securities premium/discount	6,887	9,674
Amortization of intangible assets	4,915	6,071
Stock-based compensation expense	11,817	12,194
Net change in derivative collateral liability	5,534	85,986
Net increase (decrease) in interest payable and other liabilities	(18,291)	6,547
(Increase) decrease in other assets	23,372	(146,238)
Other, net	(3,742)	(6,828)
Net cash provided by operating activities	271,713	214,691
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of securities available for sale	167,697	157,474
Purchases of securities available for sale	(289,144)	0
Proceeds from maturities of securities held to maturity	108,919	72,365
Purchases of securities held to maturity	0	(6,023)
Proceeds received upon termination of fair value hedge instruments	0	16,550
Net (increase) decrease in short-term investments	45,473	(350,103)
Net purchases of Federal Home Loan Bank stock	0	(68,057)
Proceeds from sales of loans and leases	51,055	27,439
Net increase in loans	(56,692)	(718,348)
Purchases of property and equipment	(3,584)	(18,273)
Proceeds from sales of other real estate and foreclosed assets	4,693	1,420
Other, net	507	(7,594)
Net cash provided by (used in) investing activities	28,924	(893,150)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in deposits	(489,341)	973,152
Net increase (decrease) in short-term borrowings	209,130	(241,733)
Dividends paid	(61,395)	(52,350)
Payroll tax remitted on net share settlement of equity awards	(6,801)	(3,267)
Proceeds from dividend reinvestment and stock purchase plans	2,018	1,934
Repurchase of common stock	(14,622)	0
Net cash provided by (used in) financing activities	(361,011)	677,736
NET DECREASE IN CASH AND DUE FROM BANKS	(60,374)	(723)
CASH AND DUE FROM BANKS, BEGINNING	561,202	564,459
CASH AND DUE FROM BANKS, ENDING	500,828	563,736
SUPPLEMENTAL INFORMATION FOR NON-CASH INVESTING AND FINANCING ACTIVITIES
Assets acquired in settlement of loans	$ 1,625	$ 1,322