Derivatives and Hedging Activities Gross Presentation, Effects of Offsetting, and Net Presentation of Derivatives (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 156	$ 444
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	17,997	20,015
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	156	444
Derivative Liabilities [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	17,997	20,015
Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	156	444
Liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 17,997	$ 20,015