Derivatives and Hedging Activities Gross Presentation, Effects of Offsetting, and Net Presentation of Derivatives (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 2,241	$ 78
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(350)	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability, Fair Value, Gross Liability	13,071	13,392
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(350)	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	1,891	78
Derivative Liabilities [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	12,721	13,392
Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	2,241	78
Liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 13,071	$ 13,392