Derivatives and Hedging Activities (Gains and Losses on Derivatives) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
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	$ (90)	$ (337)	$ (957)	$ 76
Derivatives Not Designated as a Hedging Instruments [Member] | Other income (expense) [Member] | Interest rate products [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(95)	(335)	(1,060)	75
Derivatives Not Designated as a Hedging Instruments [Member] | Other income (expense) [Member] | Credit contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	5	(2)	103	1
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(129)	(55)	(366)	(55)
Designated as Hedging Instrument [Member] | Other income (expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	$ (129)	$ (55)	$ (366)	$ (55)