Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets [Abstract]
Debt Securities, Available-for-sale	$ 4,581,434	$ 3,600,892
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	3,738,687	3,860,160
Equity Securities, FV-NI and without Readily Determinable Fair Value	23,242	41,651
Loans and Leases Receivable, Net of Deferred Income	29,768,586	29,216,218
Loans and Leases Receivable, Allowance	(363,545)	(351,094)
Other Short-Term Investments	258,886	258,067
Property, Plant and Equipment, Net	379,093	372,978
Goodwill	1,104,992	1,104,992
Intangible Assets, Net (Excluding Goodwill)	31,660	40,471
Servicing Asset at Fair Value, Amount	87,683	84,390
Interest Receivable	167,772	169,569
Other Assets	676,987	658,604
Assets, Total	43,023,068	41,015,855
Liabilities and Equity [Abstract]
Noninterest-Bearing Domestic Deposit, Demand	5,775,657	6,119,956
Interest-Bearing Deposit Liabilities, Domestic	28,872,777	27,326,093
Deposits, Total	34,648,434	33,446,049
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	470,369	326,780
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,853,807	1,940,194
Other Long-Term Debt	837,635	541,269
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	38,776	34,776
Other Liabilities	568,485	552,814
Liabilities, Total	38,417,506	36,841,882
Equity, Attributable to Parent [Abstract]
Preferred Stock, Including Additional Paid in Capital		194,112
Common Stock, Value, Issued		1,752
Additional Paid in Capital, Common Stock		1,714,822
Retained Earnings (Accumulated Deficit)		2,946,805
Accumulated Other Comprehensive Income (Loss), Net of Tax		(171,096)
Treasury Stock, Value		(512,421)
Total Common Equity	4,411,450	3,979,861
Equity, Attributable to Parent, Total	4,605,562	4,173,973
Liabilities and Equity, Total	$ 43,023,068	$ 41,015,855
Preferred Stock, Shares Authorized	750,000	750,000
Preferred Stock, Shares Issued	200,000	200,000
Common Stock, Shares Authorized	250,000,000	250,000,000
Common Stock, Shares, Issued	189,016,409	175,216,409
Common Stock, Shares, Outstanding	166,177,658	151,036,674
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Residential Mortgage [Member]
Assets [Abstract]
Loans and Leases Receivable, Net of Deferred Income	$ 7,047,541	$ 7,864,891
Liabilities and Equity [Abstract]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	553	835
Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Cash and Due from Banks	544,059	484,384
Interest-Bearing Deposits in Banks and Other Financial Institutions	453,590	425,089
Federal Funds Sold and Securities Purchased under Agreements to Resell	21,955	14,350
Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	179,665	229,171
Life Insurance, Corporate or Bank Owned, Amount	689,000	682,649
Liabilities and Equity [Abstract]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,853,807	1,940,194
Other Long-Term Debt	837,635	541,269
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage [Member]
Assets [Abstract]
Financing Receivable, Held-for-Sale	646,687	33,011
Fair Value, Inputs, Level 2 [Member] | Commercial Loan
Assets [Abstract]
Financing Receivable, Held-for-Sale	32,634	90,303
Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Loans and Leases Receivable, Net Amount	29,405,041	28,865,124
Servicing Asset at Fair Value, Amount	87,683	84,390
Liabilities and Equity [Abstract]
Noninterest-Bearing Domestic Deposit, Demand	$ 5,775,657	$ 6,119,956