Derivative and Hedging Activities, Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other assets), fair value	$ 94,687	$ 68,759
Less: Legally enforceable master netting agreements	8,301	2,788
Less: Cash collateral pledged/received	36,331	26,898
Derivative Asset	50,056	39,072
Liability
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other liabilities), fair value	202,974	254,506
Less: Legally enforceable master netting agreements	8,301	2,788
Less: Cash collateral pledged/received	342	217
Derivatives (trading liabilities)	194,331	251,500
Not designated as hedging instruments: | Other Assets [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other assets), fair value	75,271	64,410
Not designated as hedging instruments: | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	4,412,666	4,246,823
Not designated as hedging instruments: | Other Assets [Member] | Mortgage banking(a)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	59,184	21,265
Not designated as hedging instruments: | Other Assets [Member] | Interest rate lock commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	468,094	499,078
Not designated as hedging instruments: | Liability
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading and other assets), fair value	202,974	253,245
Not designated as hedging instruments: | Liability | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	4,737,474	4,599,391
Not designated as hedging instruments: | Liability | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	83,500	33,000
Not designated as hedging instruments: | Liability | Interest rate lock commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	454,970	461,134
Designated as Hedging Instrument | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Asset	19,416	4,349
Derivatives (trading liabilities)	0	1,260
Designated as Hedging Instrument | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	2,000,000	900,000
Designated as Hedging Instrument | Liability | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional Amount	850,000	1,150,000
Fair Value, Inputs, Level 3
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading liabilities)	441	46
Fair Value, Measurements, Recurring | Not designated as hedging instruments: | Mortgage banking(a)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Asset	338	86
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading liabilities)	441	46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate lock commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivatives (trading liabilities)	3,194	1,801
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not designated as hedging instruments: | Interest rate-related instruments — customer and mirror
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Asset	71,619	62,401
Derivatives (trading liabilities)	199,339	251,398
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not designated as hedging instruments: | Interest rate lock commitments (mortgage)
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Asset	$ 3,313	$ 1,922