Derivatives and Hedging Activities (Fair Value of Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives Not Designated as a Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 18,641	$ 6,854
Liability Derivatives	19,494	6,623
Derivatives Not Designated as a Hedging Instruments [Member] | Other Assets [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	18,634	6,849
Derivatives Not Designated as a Hedging Instruments [Member] | Other Assets [Member] | Credit contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	7	5
Derivatives Not Designated as a Hedging Instruments [Member] | Other Liabilities [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	19,468	6,623
Derivatives Not Designated as a Hedging Instruments [Member] | Other Liabilities [Member] | Credit contracts [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	26	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Liability Derivatives	722	122
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 722	$ 122