Consolidated Statements of Cash Flow (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 57,533,000	$ 35,915,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for credit losses	2,322,000	2,936,000
Depreciation and amortization	5,523,000	5,606,000
Net amortization of securities premiums and discounts	(273,000)	1,921,000
Realized securities losses	213,000	3,915,000
Gain on sales of loans	(604,000)	(1,666,000)
Cash receipts from the sale of loans originated for sale	34,246,000	83,749,000
Cash disbursements for loans originated for sale	(33,634,000)	(67,444,000)
Deferred income tax benefit	(778,000)	(968,000)
Gain on sale of other assets	(578,000)	(771,000)
Increase in interest receivable	(1,390,000)	(4,714,000)
Increase in interest payable	2,264,000	485,000
Amortization of stock-based compensation arrangements	382,000	458,000
Excess tax benefit from stock-based compensation arrangements	(324,000)	(1,024,000)
Other, net	4,602,000	5,209,000
Net cash provided by operating activities	69,504,000	63,607,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	0	121,099,000
Net decrease/(increase) in federal funds sold	1,766,000	(76,000)
Purchases of available for sale debt securities	(91,312,000)	(966,818,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	170,000	61,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	32,940,000	19,689,000
Proceeds from sales of available for sale securities	0	222,473,000
Purchase of equity securities	(195,000)	(144,000)
Proceeds from paydowns and sales of equity securities	485,000	697,000
Net change in loans	(176,739,000)	(67,669,000)
Net receipts/(payments) on derivative asset contracts	11,141,000	(70,694,000)
Purchases of premises, equipment and computer software	(7,962,000)	(6,896,000)
Purchase of tax credits	(536,000)	(770,000)
Other, net	1,658,000	3,078,000
Net cash used in investing activities	(228,584,000)	(2,723,745,000)
FINANCING ACTIVITIES
Net change in deposits	(364,125,000)	2,729,040,000
Net change in short-term borrowings	203,194,000	3,300,000
Issuance of common stock in connection with stock options, net	642,000	3,143,000
Cash dividends paid	(13,150,000)	(11,738,000)
Net cash used in financing activities	(173,439,000)	745,970,000
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	(332,519,000)	2,041,382,000
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	2,836,391,000	4,091,404,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	34,026,000	2,503,000
Cash paid during the period for income taxes	1,880,000	0
Noncash investing and financing activities:
Cash consideration for acquisitions	0	77,685,000
Fair value of assets acquired in acquisitions	0	510,888,000
Liabilities assumed in acquisitions	0	433,203,000
Unpaid common stock dividends declared	$ 13,160,000	$ 11,781,000