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Patents Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]  
For the remainder of 2017 $ 16,819
2018 21,256
2019 19,150
2020 6,707
2021 5,421
Thereafter 11,451
Total expected amortization expense $ 80,804