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Fair Value Measurement Disclosures (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Derivative designated as a cash flow hedging instrument:    
Derivative instruments $ 527 $ 602
Significant other observable inputs (Level 2)
   
Derivative designated as a cash flow hedging instrument:    
Derivative instruments $ 527 $ 602