Debt - Summary of Amounts Outstanding under the Credit Facility (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items]
Long-term debt, gross	$ 2,201,710
Line of credit | Revolving credit facility
Line of Credit Facility [Line Items]
Interest Rate	2.66%
Debt, net	$ 115,751
Letters of credit	$ 5,700
Line of credit | Tranche A-1 Term Loan
Line of Credit Facility [Line Items]
Interest Rate	3.17%
Long-term debt, gross	$ 50,000
Unamortized deferred financing costs, net	(3,463)
Debt, net	$ 46,537