Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Summary of Amortization Expense for Intangible Assets for Each of Next Five Years (Details)

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Intangible Assets - Summary of Amortization Expense for Intangible Assets for Each of Next Five Years (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]  
2017 $ 11,089
2018 10,593
2019 10,214
2020 9,658
2021 9,612
2022 $ 9,216