CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 56,564	$ 55,924	$ 151,526	$ 170,343
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			18,758	20,342
Provision (benefit) for credit losses			11,983	(12,262)
Net amortization of premium on securities			50,886	30,975
Securities (gains) losses, net	1,055	(1,535)	272	(4,347)
Unrealized (gain) loss on equity securities, net			615	(85)
Stock based compensation			7,411	6,732
Loans originated for sale			(244,908)	(364,808)
Proceeds on sales of loans held for sale			263,904	401,078
Net gains on sale of loans held for sale			(6,926)	(15,399)
(Increase) decrease in accrued interest receivable			(5,348)	353
Decrease in prepaid expenses			1,479	318
Increase (decrease) in accrued interest payable			483	(271)
Capitalization of servicing rights			(1,218)	(1,055)
Valuation adjustment on servicing rights	0	(195)	(1,658)	(586)
(Gain) loss on sales/valuations of assets, net			(390)	1,970
Net excess tax benefit from stock based compensation			129	304
Other, net			66,142	(751)
NET CASH PROVIDED BY OPERATING ACTIVITIES			313,140	232,851
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of time deposits in other financial institutions			0	(9)
Proceeds from the sale of securities available for sale	57,610	169,108	1,031,521	799,588
Proceeds from the sale of securities held to maturity			2,337	0
Proceeds from the maturity of and principal paydowns on securities available for sale			758,453	722,512
Proceeds from the maturity of and principal paydowns on securities held to maturity			2,500	4,634
Proceeds from the maturity of time deposits in other financial institutions			1,154	0
Proceeds from the sale, maturity of, redemption of and principal paydowns on other investments			13,674	2,843
Purchase of securities available for sale			(1,982,073)	(2,941,662)
Purchase of other investments			(10,045)	(10,922)
Net (increase) decrease in loans			(1,002,220)	150,876
Purchase of bank owned life insurance policies			(209)	(196)
Proceeds from bank owned life insurance policies			502	0
Capital expenditures			(12,276)	(15,705)
Proceeds from the sale of equipment			6,789	7,332
Net cash expended in divestitures			(50,616)	(15,682)
Proceeds on sale of OREO and other repossessed assets			2,564	5,032
NET CASH USED BY INVESTING ACTIVITIES			(1,237,945)	(1,291,359)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in demand deposits			(396,552)	855,996
Net increase in savings deposits			1,204,574	411,864
Net increase (decrease) in time deposit accounts			105,695	(198,024)
Net increase in short-term borrowings			14,003	97,748
Proceeds from short term advances			236,000	51,700
Repayments of short term advances			(236,000)	(51,700)
Proceeds from other borrowings			0	147,614
Repayments of other borrowings			(198)	(233,765)
Proceeds from issuance of common stock			1,896	1,716
Dividends paid			(40,352)	(35,139)
NET CASH PROVIDED BY FINANCING ACTIVITIES			889,066	1,048,010
Net decrease in cash and cash equivalents			(35,739)	(10,498)
Cash and cash equivalents at beginning of year			435,599	337,903	$ 337,903
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 399,860	$ 327,405	399,860	327,405	$ 435,599
Supplemental disclosures:
Cash paid for income/franchise taxes			33,412	42,425
Cash paid for interest			36,456	21,632
Loans transferred to OREO			8,458	2,713
Transfer of premises from premises, furniture and equipment, net, to premises, furniture and equipment held for sale			4,555	1,564
Transfer of premises from premises, furniture and equipment held for sale to premises, furniture and equipment, net			0	396
Dividends declared, not paid			2,013	2,013
Transfer of available for sale securities to held to maturity securities			$ 748,252	$ 0