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Derivatives (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]    
Net gain recognized in OCI $ 270 [1] $ 294 [1]
Net loss (gain) reclassified from accumulated OCI into income (385) [2] 308 [2]
Net gain (loss) recognized in income $ 0 [3] $ 0 [3]
[1] Net change in the fair value of the effective portion classified in other comprehensive income ("OCI").
[2] Effective portion classified as direct operating costs.
[3] There were no ineffective portions for the periods presented.