Long-Term Debt and Other Long-Term Liabilities - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Long-term debt
Less: Unamortized debt issuance costs	$ (8,616)
Long-term Debt	2,210,198
Capital leases	917	$ 543
Long-term notes payable	2,531
Less: Current portion	(615)	(4,545)
Long-term debt, noncurrent	2,189,578	795,881
New Term Loan
Long-term debt
Long-term debt, gross	956,750
Less: Unamortized discount and debt issuance costs	(18,748)
Long-term Debt	938,002
6% Senior Notes
Long-term debt
Long-term debt, gross	875,000
Plus: Unamortized debt premium	26,605
Less: Unamortized debt issuance costs	(20,716)
Long-term Debt	880,889
Term Loan
Long-term debt
Long-term debt, gross		418,625
Less: Unamortized discount and debt issuance costs		(12,578)
Long-term Debt		406,047
Prior Revolving Credit Facility
Long-term debt
Long-term debt, gross		29,000
Less: Unamortized debt issuance costs		(2,023)
Long-term Debt		26,977
7% Senior Notes
Long-term debt
Long-term debt, gross	375,000	375,000
Less: Unamortized discount and debt issuance costs	(7,146)	(8,141)
Long-term Debt	$ 367,854	$ 366,859

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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