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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Jun. 30, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remaining six months of 2018 $ 11,479
2019 17,949
2020 16,746
2021 15,320
2022 13,968
Thereafter (excluding in-process technology) 76,388
Net carrying amount $ 151,850