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Commitments and Contingencies Future Purchase Commitments (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]  
Remainder of 2014 $ 33,598
2015 12,499
2016 2,472
2017 192
2018 2
Unconditional purchase obligations $ 48,763