Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income	$ 62,631	$ 62,300
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion, net	10,880	12,126
Provision for credit losses	12,899	21,783
Stock based compensation	2,403	2,482
Deferred income tax expense	4,059	8,103
Securities losses, net	0	1,644
Gains from sales of other loans	(1,537)	(1,916)
Changes in assets and liabilities:
Other assets	(12,359)	10,303
Accrued expenses and other liabilities	14,965	(22,029)
Loans held for sale	(5,132)	(4,703)
Net cash provided by operating activities	88,809	90,093
Debt securities held-to-maturity:
Proceeds from maturities and calls	27,051	31,550
Debt securities available-for-sale:
Proceeds from sales	647	380,661
Proceeds from maturities and calls	229,902	83,794
Purchases	(302,962)	(25,862)
Net increase in loans	(67,629)	(345,316)
Payments for other investments	(4,353)	(74,323)
Proceeds from other investments	380	93,687
Proceeds from sales of premises and equipment	16	2,169
Purchases of premises and equipment	(13,710)	(22,602)
Net cash received in acquisition	0	57,101
Other investing inflows	8,145	436
Net cash (used in) provided by investing activities	(122,513)	181,295
Financing activities:
Net increase in deposits	21,024	793,162
Net decrease in short-term borrowings	0	(292,732)
Proceeds from FHLB advances	100	1,580,000
Repayment of FHLB advances	(100)	(2,195,000)
Cash dividends on common stock	(27,733)	(23,674)
Cash dividends on preferred stock	(1,573)	(1,719)
Other financing inflows	1,211	1,058
Other financing outflows	(1,167)	(1,655)
Net cash used in financing activities	(8,238)	(140,560)
Net change in cash and cash equivalents	(41,942)	130,828
Cash and cash equivalents, beginning of period	1,003,875	646,853
Cash and cash equivalents, end of period	$ 961,933	$ 777,681