Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	$ 18,860	$ 16,697
Liability Derivatives	227,956	225,648
Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	19,150	16,965
Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Liability Derivatives	18,855	16,765
Interest rate swaps [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	0	0
Liability Derivatives	5,923	9,630
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Liability Derivatives	5,923	9,630
Loan level swaps [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	14,820	16,301
Liability Derivatives	14,829	16,340
Loan level swaps [Member] | Not Designated as Hedging Instrument | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	14,820	16,301
Loan level swaps [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Liability Derivatives	14,829	16,340
Foreign exchange contracts
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset	4,040	396
Liability Derivatives	4,012	390
Foreign exchange contracts | Not Designated as Hedging Instrument | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Asset, Fair Value, Gross Asset		396
Foreign exchange contracts | Not Designated as Hedging Instrument | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Liability Derivatives	4,012	390
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Commitments, Fair Value Disclosure	280	204
Forward TBA Mortgage Contracts	0	64
Forward Sales Agreements	10	0
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Commitments, Fair Value Disclosure	0	0
Forward TBA Mortgage Contracts	14	0
Forward Sales Agreements	$ 0	$ 35