Consolidated Statements of Cash Flow (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 163,531,000	$ 135,974,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for credit losses	7,458,000	6,300,000
Depreciation and amortization	16,742,000	16,602,000
Net amortization of securities premiums and discounts	(883,000)	3,002,000
Realized securities losses	464,000	2,949,000
Gain on sales of loans	(2,095,000)	(3,891,000)
Cash receipts from the sale of loans originated for sale	118,786,000	207,972,000
Cash disbursements for loans originated for sale	(114,312,000)	(184,129,000)
Deferred income tax benefit	(2,038,000)	(2,940,000)
Gain on sale of other assets	(1,635,000)	(4,185,000)
Increase in interest receivable	(8,519,000)	(11,703,000)
Increase in interest payable	5,235,000	528,000
Amortization of stock-based compensation arrangements	2,077,000	1,545,000
Excess tax benefit from stock-based compensation arrangements	(775,000)	(3,058,000)
Other, net	6,245,000	14,326,000
Net cash provided by operating activities	190,281,000	179,292,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	8,045,000	121,099,000
Net increase in federal funds sold	(4,025,000)	(465,000)
Purchases of available for sale debt securities	(154,104,000)	(1,375,496,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	1,350,000	72,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	161,414,000	48,300,000
Proceeds from sales of available for sale securities	0	222,474,000
Purchase of equity securities	(310,000)	(3,952,000)
Proceeds from paydowns and sales of equity securities	531,000	1,378,000
Net change in loans	(532,471,000)	(405,052,000)
Net payments on derivative asset contracts	(16,817,000)	(11,019,000)
Purchases of premises, equipment and computer software	(17,695,000)	(15,105,000)
Purchase of tax credits	(6,670,000)	(4,091,000)
Other, net	24,756,000	12,547,000
Net cash used in investing activities	(535,996,000)	(1,409,310,000)
FINANCING ACTIVITIES
Net change in deposits	(450,870,000)	2,537,009,000
Net change in short-term borrowings	3,676,000	4,600,000
Issuance of common stock in connection with stock options, net	2,066,000	7,011,000
Common stock acquired	(1,820,000)
Cash dividends paid	(39,486,000)	(35,319,000)
Net cash used in financing activities	(486,434,000)	2,513,301,000
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	(832,149,000)	1,283,283,000
Cash, due from banks and interest-bearing deposits at the beginning of the period	3,168,910,000	2,050,022,000
Cash, due from banks and interest-bearing deposits at the end of the period	2,336,761,000	3,333,305,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	131,864,000	20,154,000
Cash paid during the period for income taxes	42,680,000	26,780,000
Noncash investing and financing activities:
Cash (received)/consideration for acquisitions	(7,833,000)	77,685,000
Fair value of assets acquired in acquisitions	2,981,000	511,580,000
Liabilities assumed in acquisitions	10,814,000	433,896,000
Unpaid common stock dividends declared	$ 14,156,000	$ 13,143,000