Derivative Financial Instruments Scheduel of Offsetting of Derivative Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	$ 2,416	$ 905
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	2,416	905
Derivative Asset, Fair Value, Gross Liability	(447)	(287)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	1,969us-gaap_DerivativeAssets	618us-gaap_DerivativeAssets
Barclays [Member]
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	319	905
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	319	905
Derivative Asset, Fair Value, Gross Liability	(16)	(287)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	303	618
Wells Fargo Bank [Member]
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	2,097	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	2,097	0
Derivative Asset, Fair Value, Gross Liability	(431)	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	$ 1,666	$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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