Consolidated Statements of Cash Flow (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 35,915,000	$ 42,520,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for credit losses	2,936,000	0
Depreciation and amortization	5,606,000	4,670,000
Net amortization of securities premiums and discounts	1,921,000	369,000
Realized securities losses/(gains)	3,915,000	(95,000)
Gain on sales of loans	(1,666,000)	(2,010,000)
Cash receipts from the sale of loans originated for sale	83,749,000	114,517,000
Cash disbursements for loans originated for sale	(67,444,000)	(98,043,000)
Deferred income tax benefit	(968,000)	(738,000)
Gain on sale of other assets	(771,000)	(2,584,000)
Increase/(decrease) in interest receivable	(4,714,000)	235,000
Increase/(decrease) in interest payable	485,000	(329,000)
Amortization of stock-based compensation arrangements	458,000	576,000
Excess tax benefit from stock-based compensation arrangements	(1,024,000)	(1,551,000)
Other, net	5,209,000	11,504,000
Net cash provided by operating activities	63,607,000	69,041,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	121,099,000
Net cash paid from sale of assets and liabilities, net of cash received		(13,733,000)
Net increase in federal funds sold	(76,000)
Purchases of available for sale debt securities	(966,818,000)	(210,662,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	61,000	7,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	19,689,000	243,597,000
Proceeds from sales of available for sale securities	222,473,000	0
Purchase of equity securities	(144,000)	(171,000)
Proceeds from paydowns and sales of equity securities	697,000	194,000
Net change in loans	(67,669,000)	32,053,000
Net payments on derivative asset contracts	(70,694,000)	(671,000)
Purchases of premises, equipment and computer software	(6,896,000)	(7,718,000)
Purchase of tax credits	(770,000)	(1,262,000)
Other, net	3,078,000	2,858,000
Net cash (used in) provided by investing activities	(745,970,000)	44,492,000
FINANCING ACTIVITIES
Net change in deposits	2,729,040,000	1,344,608,000
Net change in short-term borrowings	3,300,000	2,650,000
Issuance of common stock in connection with stock options, net	3,143,000	1,309,000
Net cash settlement of options		(5,479,000)
Cash dividends paid	(11,738,000)	(11,125,000)
Net cash provided by financing activities	2,723,745,000	1,331,963,000
Net increase in cash, due from banks and interest-bearing deposits	2,041,382,000	1,445,496,000
Cash, due from banks and interest-bearing deposits at the beginning of the period	2,050,022,000	1,616,912,000
Cash, due from banks and interest-bearing deposits at the end of the period	4,091,404,000	3,062,408,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	2,503,000	3,155,000
Cash paid during the period for income taxes		1,300,000
Noncash investing and financing activities:
Cash consideration for acquisitions	77,685,000
Fair value of assets acquired in acquisitions	510,888,000
Liabilities assumed in acquisitions	433,203,000
Unpaid common stock dividends declared	$ 11,781,000	$ 11,134,000