Derivatives and Hedging Activities (Fair Value of Derivatives) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives Not Designated as a Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 7,055	$ 7,159
Liability Derivatives	6,872	6,750
Derivatives Not Designated as a Hedging Instruments [Member] | Other Assets [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	7,053	7,156
Derivatives Not Designated as a Hedging Instruments [Member] | Other Assets [Member] | Credit contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	2	3
Derivatives Not Designated as a Hedging Instruments [Member] | Other Liabilities [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	6,872	6,750
Derivatives Not Designated as a Hedging Instruments [Member] | Other Liabilities [Member] | Credit contracts [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	0	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	374	282
Liability Derivatives	0	0
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	374	282
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest rate products [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0	$ 0