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Patents Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Jun. 30, 2015
USD ($)
Finite-Lived Intangible Assets [Line Items]  
For the remainder of 2015 $ 26,080
2016 49,765
2017 48,676
2018 44,549
2019 38,917
Thereafter 54,350
Total expected amortization expense $ 262,337