Derivative Financial Instruments Schedule of Offsetting of Derivate Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 381	$ 1,619
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	381	1,619
Derivative Liability, Fair Value, Gross Asset	(287)	(1,144)
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	94	475
Barclays [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	287	1,401
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	287	1,401
Derivative Liability, Fair Value, Gross Asset	(287)	(1,107)
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	0	294
Wells Fargo Bank [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	94	218
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	94	218
Derivative Liability, Fair Value, Gross Asset	0	(37)
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	$ 94	$ 181