CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 166,228	$ 210,070
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	10,617	11,164
Provision for credit losses	8,433	1,994
Share-based compensation expense	14,622	14,171
Loss on sales and disposals of premises and equipment	131	54
Net gain on sales of other real estate owned	(106)	0
Net amortization on securities	11,244	14,127
Net accretion of discounts/premiums for acquired loans and deferred loan fees/costs	(11,573)	(22,328)
Net gain on sales of investment securities available-for-sale	(138)	(1,710)
Net gain on sales of loans	(419)	(3,087)
Deferred income tax expense	677	5,561
Income from bank owned life insurance, net	(8,453)	(7,949)
Amortization of intangible assets	9,281	10,543
Origination of loans held for sale	(1,370)	(57,685)
Proceeds from the sales of and principal payments from loans held for sale	2,085	69,478
Change in accrued expenses and other liabilities, net	78,202	6,075
Change in accrued interest receivable and other assets, net	(10,970)	82,719
Net cash provided by operating activities	268,491	333,197
Cash flows from investing activities:
Net decrease in interest-bearing time deposits with financial institutions	492	483
Proceeds from sales of other real estate owned	3,307	0
Loan originations and payments, net	1,330,911	(664,678)
Proceeds from loans held for sale previously classified as loans held for investment	84,472	0
Purchase of loans held for investment	0	(797)
Purchase of securities held-to-maturity	(21,357)	0
Proceeds from prepayments and maturities of securities held-to-maturity	35,748	15,570
Purchase of securities available-for-sale	(224,347)	(986,997)
Proceeds from prepayments and maturities of securities available-for-sale	198,433	248,629
Proceeds from sales of securities available-for-sale	304,320	936,413
Proceeds from the sales of premises and equipment	3	0
Proceeds from surrender of bank owned life insurance	272	0
Purchase of premises and equipment	(5,604)	(4,961)
Change in FHLB, FRB, and other stock	1,784	(2,321)
Funding of Community Reinvestment Act (“CRA”) investments, net	(32,621)	(10,910)
Net cash provided by (used in) investing activities	1,675,813	(469,569)
Cash flows from financing activities:
Net (decrease) increase in deposit accounts	(1,344,954)	630,785
Net change in short-term borrowings	(200,000)	(358,000)
Proceeds from long-term borrowings	0	400,000
Cash dividends paid	(94,616)	(93,806)
Proceeds from exercise of stock options	246	759
Restricted stock surrendered and canceled	(5,953)	(8,858)
Net cash (used in) provided by financing activities	(1,645,277)	570,880
Net increase in cash and cash equivalents	299,027	434,508
Cash and cash equivalents, beginning of period	1,101,249	304,703
Cash and cash equivalents, end of period	1,400,276	739,211
Supplemental cash flow disclosures:
Interest paid	177,393	28,638
Income taxes paid, net	1,610	47,932
Noncash investing activities during the period:
Transfers from loans held for investment to loans held for sale	84,993	0
Transfers from loans held for sale to loans held for investment	2,227	0
Other real estate owned transferred from loans held for investment	7,336	0
Transfers of investment securities from available-for-sale to held-to-maturity	360,347	1,019,472
Transfers of CRA investment securities from FHLB, FRB, and other stock to other assets	12,601	0
Recognition of operating lease right-of-use assets	(4,259)	(1,183)
Recognition of operating lease liabilities	$ 4,336	$ 1,183