Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Asset	[1]	$ 84,877	$ 70,174
Derivative Liability	[2]	161,277	146,666
Derivative Asset, Fair Value, Amount Offset Against Collateral	[1]	38,369	32,435
Derivative, Collateral, Obligation to Return Securities	[3]	12,399	20,019
Derivative, Collateral, Right to Reclaim Securities	[3]	12,399	20,019
Derivative, Collateral, Obligation to Return Cash		(34,109)	(17,720)
Derivative, Collateral, Right to Reclaim Cash		0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	[2]	148,878	126,647
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	[1]	149,028	127,958
Derivative Asset, Fair Value, Gross Asset	[1]	159,487	127,958
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	[2]	148,777	127,667
Liability Derivatives	[2]	204,971	179,911
Interest Rate Swap [Member] | Derivatives designated as hedges [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	[1]	10,459	0	[4]
Interest Rate Swap [Member] | Derivatives designated as hedges [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	[2],[5]	56,194	52,244
Loan level swaps | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1],[4]	146,657	123,372
Loan level swaps | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	[2],[5]	146,754	123,374
Foreign Exchange Contract [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	2,050	4,352
Foreign Exchange Contract [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	[2]	2,019	4,278
Risk Participation Agreement | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Credit Risk Derivative Assets, at Fair Value	[1]	102	161
Risk Participation Agreement | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Credit Risk Derivative Liabilities, at Fair Value	[2]	4	15
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Asset at Fair Value	[1]	125	43
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Asset at Fair Value	[1]	94	30
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Liabilities at Fair Value		0	0	[2]
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Liabilities at Fair Value	[2]	0	0
CME [Member]
Derivatives, Fair Value [Line Items]
Derivative, Collateral, Obligation to Return Cash	[6]	74,610	57,784
Derivative, Collateral, Right to Reclaim Cash	[6]	$ 43,694	$ 33,245

[1] All asset derivatives are reflected in other assets on the balance sheet.

[2] All liability derivatives are reflected in other liabilities on the balance sheet.

[3] Reflects offsetting derivative positions with the same counterparty that are not netted on the balance sheet.

[4] As of September 30, 2023, approximately $405,000 and $3.2 million of accrued interest receivable is included in the fair value of interest rate and loan level derivative assets, respectively. Accrued interest receivable of approximately $2.2 million is included in the fair value of loan level derivative assets at December 31, 2022.

[5] Approximately $2.0 million and $3.2 million of accrued interest payable is included in the fair value of interest rate and loan level derivative liabilities, respectively, at September 30, 2023, in comparison to accrued interest payable of approximately $1.3 million and $2.2 million, respectively, at December 31, 2022.

[6] Netting adjustments represent the amounts recorded to convert derivative assets and liabilities cleared through CME from a gross basis to a net basis, inclusive of the variation margin payments, in accordance with applicable accounting guidance.