Derivatives (Fair Values of Derivative Financial Instruments) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		$ 7,936,239	$ 8,649,657
Fair Values, Assets		110,734	6,908
Fair Values, Assets		$ 219,935	$ 106,171
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets	Other Assets
Less: netting adjustments	[1]	$ (110,438)	$ (30,304)
Total derivate assets/liabilities		109,497	75,867
Fair Values, Liabilities		32,601	22,244
Fair Values, Liabilities	[2]	285,592	96,580
Less: netting adjustments	[1],[2]	(81,471)	(61,534)
Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Total derivate assets/liabilities	[2]	204,121	35,046
Derivatives Designated as Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		2,816,000	2,962,650
Fair Values, Assets		45,802	28,022
Fair Values, Liabilities	[2]	112,262	15,111
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		5,120,239	5,687,007
Fair Values, Assets		174,133	78,149
Fair Values, Liabilities	[2]	173,330	81,469
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		4,620,544	5,193,991
Fair Values, Assets		172,242	75,819
Fair Values, Liabilities	[2]	169,712	75,861
Derivatives Not Designated as Hedging Instruments [Member] | Risk Participation Agreements [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		298,729	217,437
Fair Values, Assets		1	11
Fair Values, Liabilities	[2]	13	35
Derivatives Not Designated as Hedging Instruments [Member] | Forward Commitments to Sell Residential Mortgage Loans [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		10,930	46,739
Fair Values, Assets		8	1
Fair Values, Liabilities	[2]	113	645
Derivatives Not Designated as Hedging Instruments [Member] | To Be Announced (TBA) Securities [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		10,000	55,000
Fair Values, Assets		78	15
Fair Values, Liabilities	[2]	7	53
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		13,819	82,037
Fair Values, Assets		161	1,525
Fair Values, Liabilities	[2]	8	1
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Exchange Forward Contracts [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		123,106	48,364
Fair Values, Assets		1,643	778
Fair Values, Liabilities	[2]	1,594	758
Derivatives Not Designated as Hedging Instruments [Member] | Visa Class B derivative contract [Member]
Derivatives Fair Value [Line Items]
Notional or Contractual Amount		43,111	43,439
Fair Values, Liabilities	[2]	1,883	4,116
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		2,100,000	1,125,000
Fair Values, Assets		2,301	5,884
Fair Values, Liabilities	[2]	$ 112,262	$ 4,421
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		$ 716,000	$ 1,837,650
Fair Values, Assets		$ 43,501	$ 22,138
Derivative Asset, Statement of Financial Position [Extensible Enumeration]		Other Assets	Other Assets
Fair Values, Liabilities	[2]		$ 10,690
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities	Other Liabilities

[1] 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.

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