Derivatives (Fair Values of Derivative Financial Instruments) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Jul. 01, 2023
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		$ 7,392,532,000	$ 7,691,719,000
Fair Values, Assets		71,893,000	84,458,000
Fair Values, Assets	[1]	$ 150,253,000	$ 156,360,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets	Other Assets
Less: netting adjustments	[1],[2]	$ (76,413,000)	$ (65,648,000)
Total derivate assets/liabilities	[1]	73,840,000	90,712,000
Fair Values, Liabilities		54,707,000	87,567,000
Fair Values, Liabilities	[1]	160,623,000	207,138,000
Less: netting adjustments	[1],[2]	0
Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Total derivate assets/liabilities	[1]	160,623,000	207,138,000
Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount				$ 3,500,000,000
Risk Participation Agreements [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount				$ 163,500,000
Derivatives Designated as Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		1,827,500,000	2,027,500,000
Fair Values, Assets	[1]	39,647,000	22,819,000
Fair Values, Liabilities	[1]	48,022,000	73,611,000
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		5,565,032,000	5,664,219,000
Fair Values, Assets	[1]	110,606,000	133,541,000
Fair Values, Liabilities	[1]	112,601,000	133,527,000
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		4,926,461,000	5,128,144,000
Fair Values, Assets	[1]	108,702,000	131,271,000
Fair Values, Liabilities	[1]	108,761,000	129,994,000
Derivatives Not Designated as Hedging Instruments [Member] | Risk Participation Agreements [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		445,554,000	364,906,000
Fair Values, Assets	[1]	7,000	34,000
Fair Values, Liabilities	[1]	9,000	18,000
Derivatives Not Designated as Hedging Instruments [Member] | Forward Commitments to Sell Residential Mortgage Loans [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		25,526,000	13,355,000
Fair Values, Assets	[1]		0
Fair Values, Liabilities	[1]	383,000	286,000
Derivatives Not Designated as Hedging Instruments [Member] | To Be Announced (TBA) Securities [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		15,250,000	13,500,000
Fair Values, Assets	[1]	88,000	0
Fair Values, Liabilities	[1]	1,000	47,000
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate-Lock Commitments on Residential Mortgage Loans [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		27,465,000	18,563,000
Fair Values, Assets	[1]	420,000	372,000
Fair Values, Liabilities	[1]	0
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Exchange Forward Contracts [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		82,756,000	83,134,000
Fair Values, Assets	[1]	1,389,000	1,864,000
Fair Values, Liabilities	[1]	1,358,000	1,840,000
Derivatives Not Designated as Hedging Instruments [Member] | Visa Class B derivative contract [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		42,020,000	42,617,000
Fair Values, Liabilities	[1]	2,089,000	1,342,000
Cash Flow Hedge [Member] | Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps - Variable Rate Loans [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		1,350,000,000	1,550,000,000
Fair Values, Assets	[1]		0
Fair Values, Liabilities	[1]	$ 48,022,000	$ 73,611,000
Fair Value Hedging [Member] | Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps - Variable Rate Loans [Member]
Derivatives Fair Value [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets	Other Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities	Other Liabilities
Fair Value Hedging [Member] | Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps - Securities [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		$ 477,500,000	$ 477,500,000
Fair Values, Assets	[1]	$ 39,647,000	$ 22,819,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets	Other Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities	Other Liabilities

[1] Derivative assets and liabilities are reported in other assets or other liabilities, respectively, in the consolidated balance sheets.

[2] Represents balance sheet netting of derivative assets and liabilities for variation margin collateral held or placed with the same central clearing counterparty. See offsetting assets and liabilities for further information.