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Derivatives (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) recognized in OCI $ (327) [1] $ (775) [1] $ 202 [1] $ (2,458) [1]
Net gain (loss) reclassified from accumulated OCI into income 232 [2] (876) [2] (149) [2] (607) [2]
Net gain recognized in income $ 0 [3] $ 0 [3] $ 0 [3] $ 0 [3]
[1] Net change in fair value of the effective portion classified into other comprehensive income ("OCI")
[2] Effective portion classified within direct operating cost
[3] There were no effective portions for the period presented.