Derivatives and Hedging Activities Gross Presentation, Effects of Offsetting, and Net Presentation of Derivatives (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 34	$ 78
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability, Fair Value, Gross Liability	15,007	13,392
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	34	78
Derivative Liabilities [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	15,007	13,392
Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	34	78
Liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 15,007	$ 13,392