Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities
Net Income	$ 92,903	$ 111,696
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	4,500	(8,000)
Depreciation and Amortization	11,525	10,607
Amortization of Deferred Loan and Lease Costs (Fees), Net	444	(561)
Amortization and Accretion of Premiums/Discounts on Investment Securities, Net	6,742	12,453
Amortization of Operating Lease Right-of-Use Assets	5,808	5,798
Share-Based Compensation	7,672	8,172
Benefit Plan Contributions	(949)	(825)
Deferred Income Taxes	(734)	839
Net Gains on Sales of Loans and Leases	(1,275)	(2,463)
Net Losses on Sales of Investment Securities	3,102	2,840
Proceeds from Sales of Loans Held for Sale	19,107	102,806
Originations of Loans Held for Sale	(21,853)	(79,660)
Net Tax (Deficiency) Benefits from Share-Based Compensation	(490)	163
Net Change in Other Assets and Other Liabilities	(145,871)	(5,516)
Net Cash (Used in) Provided by Operating Activities	(19,369)	158,349
Investment Securities Available-for-Sale:
Proceeds from Prepayments and Maturities	174,574	456,420
Purchases	(246)	(556,154)
Investment Securities Held-to-Maturity:
Proceeds from Prepayments and Maturities	220,415	381,387
Purchases		(15,240)
Net Change in Loans and Leases	(270,751)	(692,179)
Purchases of Premises and Equipment	(5,046)	(13,277)
Net Cash Provided by (Used in) Investing Activities	118,946	(439,043)
Financing Activities
Net Change in Deposits	(107,081)	665,573
Net Change in Short-Term Borrowings		(25,000)
Proceeds from Long-Term Debt	1,350,000
Repayments of Long-Term Debt	(51)	(48)
Proceeds from Issuance of Common Stock	2,973	3,826
Repurchase of Common Stock	(13,931)	(24,313)
Cash Dividends Paid on Common Stock	(55,874)	(56,474)
Cash Dividends Paid on Preferred Stock	(3,938)	(3,938)
Net Cash Provided by Financing Activities	1,172,098	559,626
Net Change in Cash and Cash Equivalents	1,271,675	278,932
Cash and Cash Equivalents at Beginning of Period	401,767	560,434
Cash and Cash Equivalents at End of Period	1,673,442	839,366
Supplemental Information
Cash Paid for Interest	110,741	11,924
Cash Paid for Income Taxes	30,623	24,946
Non-Cash Investing and Financing Activities:
Transfer from Loans to Loans Held for Sale		$ 380
Transfer from Loans Held for Sale to Loans	$ 569