Derivative and Hedging Activities, Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative Instrument Detail [Abstract]
Mortgage derivative asset, fair value, forward commitment	$ 806
Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	148,373	$ 67,690
Less: Legally enforceable master netting agreements	1,252	2,788
Less: Cash collateral pledged/received	88,207	26,898
Derivative Asset	58,915	38,003
Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	317,109	254,079
Less: Legally enforceable master netting agreements	1,252	2,788
Less: Cash collateral pledged/received	0	217
Derivatives (trading liabilities)	315,857	251,073
Designated as Hedging Instrument | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	4,995	4,765
Designated as Hedging Instrument | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	1,150,000	900,000
Designated as Hedging Instrument | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	353,217	261,595
Designated as Hedging Instrument | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	21,654	2,233
Designated as Hedging Instrument | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	1,700,000	1,150,000
Designated as Hedging Instrument | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	70,019	167,088
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	143,379	62,925
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	3,022,150	4,246,823
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	74,245	68,570
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Mortgage banking(a)(b)
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	43,436	21,265
Not Designated as Hedging Instrument [Member] | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	295,455	251,847
Not Designated as Hedging Instrument [Member] | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	6,320,192	4,599,391
Not Designated as Hedging Instrument [Member] | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	63,309	34,240
Not Designated as Hedging Instrument [Member] | Liability | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	84,000	33,000
Fair Value, Inputs, Level 3
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	0	46
Derivatives (trading liabilities)	0	46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	1,751	437
Derivatives (trading liabilities)	1,393	402
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	2,109	4,349
Derivatives (trading liabilities)	21,520	1,260
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	2,886	416
Derivatives (trading liabilities)	134	972
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	140,414	62,401
Derivatives (trading liabilities)	294,062	251,398
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Derivative Instrument Detail [Abstract]
Derivative Asset	806	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)		46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Mortgage banking(a)(b)
Derivative Instrument Detail [Abstract]
Derivative Asset	1,213	$ 86
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	$ 0