Derivatives and Hedging Activities (Gains and Losses Recognized) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 798	$ 294	$ 1,634	$ (1,400)
Mortgage loan commitments | Loan Sales and Servicing Income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	12	(46)	105	(1,066)
Forward sales contracts | Loan Sales and Servicing Income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	20	175	(56)	378
Credit Risk Contract | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	766	165	1,585	(712)
Other Credit Derivatives | Other Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains and losses recognized in income on derivatives	$ 0	$ 0	$ 0	$ 0