Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities
Net Income	$ 111,696	$ 127,482
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	(8,000)	(30,400)
Depreciation and Amortization	10,607	10,564
Amortization of Deferred Loan and Lease (Fees) Costs, Net	(561)	(7,528)
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	12,453	17,772
Amortization of Operating Lease Right-of-Use Assets	5,798	5,677
Share-Based Compensation	8,172	6,122
Benefit Plan Contributions	(825)	(856)
Deferred Income Taxes	839	4,025
Gains on Sale of Premises and Equipment		(3,143)
Net Gains on Sales of Loans and Leases	(2,463)	(9,554)
Net Losses (Gains) on Sales of Investment Securities	2,840	(1,220)
Proceeds from Sales of Loans Held for Sale	102,806	294,006
Originations of Loans Held for Sale	(79,660)	(231,917)
Net Tax Benefits from Share-Based Compensation	163	908
Net Change in Other Assets and Other Liabilities	(5,516)	29,331
Net Cash Provided by Operating Activities	158,349	211,269
Investment Securities Available-for-Sale:
Proceeds from Sales, Prepayments and Maturities	456,420	693,404
Purchases	(556,154)	(1,497,902)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	381,387	637,149
Purchases	(15,240)	(1,333,606)
Net Change in Loans and Leases	(692,179)	(119,140)
Purchases of Premises and Equipment	(13,277)	(9,730)
Proceeds from Sale of Premises and Equipment		3,496
Net Cash Used in Investing Activities	(439,043)	(1,626,329)
Financing Activities
Net Change in Deposits	665,573	1,958,088
Net Change in Short-Term Borrowings	(25,000)	(50,100)
Repayments of Long-Term Debt	(48)	(50,044)
Net Proceeds from Issuance of Preferred Stock		175,487
Proceeds from Issuance of Common Stock	3,826	6,445
Repurchase of Common Stock	(24,313)	(3,298)
Cash Dividends Paid on Common Stock	(56,474)	(54,139)
Cash Dividends Paid on Preferred Stock	(3,938)
Net Cash Provided by Financing Activities	559,626	1,982,439
Net Change in Cash and Cash Equivalents	278,932	567,379
Cash and Cash Equivalents at Beginning of Period	560,434	614,088
Cash and Cash Equivalents at End of Period	839,366	1,181,467
Supplemental Information
Cash Paid for Interest	11,924	17,299
Cash Paid for Income Taxes	24,946	26,071
Non-Cash Investing and Financing Activities:
Transfer from Loans to Loans Held for Sale	$ 380	$ 20,072