Derivatives and Hedging Activities (Gains and Losses on Derivatives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivatives Not Designated as a Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	$ (225)	$ (436)
Derivatives Not Designated as a Hedging Instruments [Member] | Other income [Member] | Interest rate products [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(226)	(540)
Derivatives Not Designated as a Hedging Instruments [Member] | Other income [Member] | Credit contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	1	104
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(57)	(145)
Designated as Hedging Instrument [Member] | Interest expense [Member] | Interest rate products [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	$ (57)	$ (145)