Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
2018	$ 24,326
2019	22,388
2020	19,031
2021	17,326
2022	14,268
Thereafter	44,682
Amortizable intangible assets, net carrying amount	142,021	$ 48,716
Cost of Revenue
Finite Lived Intangible Assets [Line Items]
2018	9,742
2019	8,877
2020	7,980
2021	7,088
2022	5,682
Thereafter	14,226
Amortizable intangible assets, net carrying amount	53,595
Operating Expenses
Finite Lived Intangible Assets [Line Items]
2018	14,584
2019	13,511
2020	11,051
2021	10,238
2022	8,586
Thereafter	30,456
Amortizable intangible assets, net carrying amount	$ 88,426