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Patents Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]  
For the remainder of 2017 $ 5,443
2018 20,542
2019 18,527
2020 6,134
2021 5,261
Thereafter 11,453
Total expected amortization expense $ 67,360