Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities
Net Income	$ 164,497	$ 189,535
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	(8,000)	(40,800)
Depreciation and Amortization	15,947	15,751
Amortization of Deferred Loan and Lease (Fees) Costs, Net	(501)	(13,431)
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	16,971	27,147
Amortization of Operating Lease Right-of-Use Assets	8,939	8,562
Share-Based Compensation	11,947	9,658
Benefit Plan Contributions	(1,236)	(1,274)
Deferred Income Taxes	(6,840)	5,308
Gains on Sale of Premises and Equipment		(9,893)
Loss on Agreement to Sell Assets That Will Terminate Certain Leveraged Leases	6,918
Net Losses (Gains) on Sales of Loans and Leases	(3,365)	(12,639)
Net Losses on Sales of Investment Securities	4,987	39
Proceeds from Sales of Loans Held for Sale	122,404	412,153
Originations of Loans Held for Sale	(95,024)	(319,274)
Net Tax Benefits from Share-Based Compensation	158	1,349
Net Change in Other Assets and Other Liabilities	31,065	68,084
Net Cash Provided by Operating Activities	268,867	340,275
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities	597,452	1,138,809
Purchases	(556,813)	(1,789,229)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	517,448	914,953
Purchases	(15,240)	(2,569,229)
Net Change in Loans and Leases	(1,070,567)	(149,765)
Purchases of Premises and Equipment	(24,805)	(14,314)
Proceeds from Sale of Premises and Equipment		9,008
Net Cash Used in Investing Activities	(552,525)	(2,459,767)
Financing Activities
Net Change in Deposits	528,665	2,282,057
Net Change in Short-Term Borrowings	(25,000)	(150,100)
Repayments of Long-Term Debt	(72)	(50,067)
Net Proceeds from Issuance of Preferred Stock		175,487
Proceeds from Issuance of Common Stock	5,315	10,836
Repurchase of Common Stock	(39,548)	(23,412)
Cash Dividends Paid on Common Stock	(84,579)	(82,429)
Cash Dividends Paid on Preferred Stock	(5,908)	(1,006)
Net Cash Provided by Financing Activities	378,873	2,161,366
Net Change in Cash and Cash Equivalents	95,215	41,874
Cash and Cash Equivalents at Beginning of Period	560,434	614,088
Cash and Cash Equivalents at End of Period	655,649	655,962
Supplemental Information
Cash Paid for Interest	24,326	25,207
Cash Paid for Income Taxes	38,467	41,193
Non-Cash Investing and Financing Activities:
Transfer of Investment Securities from Available-for-Sale to Held-to-Maturity	1,275,043
Transfer from Loans to Loans Held for Sale	$ 380	$ 23,888