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Patents Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Sep. 30, 2015
USD ($)
Finite-Lived Intangible Assets [Line Items]  
For the remainder of 2015 $ 12,732
2016 49,880
2017 48,870
2018 44,614
2019 38,981
Thereafter 54,409
Total expected amortization expense $ 249,486