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Commitments (Schedule of Operating Leases) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Commitments [Abstract]  
2014 $ 38,292
2015 30,535
2016 18,320
2017 9,858
2018 6,767
Thereafter 17,662
Total operating lease minimum commitments $ 121,434