Goodwill and Intangible Assets - Summary of Amortization Expense Associated with Intangible Assets (Details) $ in Thousands	Mar. 31, 2017 USD ($)	[1]
Estimated future amortization expense [Abstract]
Remainder of 2017	$ 66,551
2018	98,751
2019	100,877
2020	83,628
2021	80,833
Thereafter	$ 670,810

[1] The functional currency of certain foreign subsidiaries differs from the USD, so these amounts are subject to change as exchange rates fluctuate.