Derivative Financial Instruments Scheduel of Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	$ 3,205	$ 2,416
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	3,205	2,416
Derivative Asset, Fair Value, Gross Liability	(451)	(447)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	2,754	1,969
Barclays [Member]
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	577	319
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	577	319
Derivative Asset, Fair Value, Gross Liability	(56)	(16)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	521	303
Wells Fargo Bank [Member]
Offsetting of Derivative Assets [Line Items]
Derivative Assets, Fair Value	2,628	2,097
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	2,628	2,097
Derivative Asset, Fair Value, Gross Liability	(395)	(431)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	$ 2,233	$ 1,666