Debt - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Remaining 2019	$ 15,536
2020	20,714
2021	20,714
2022	120,714
2023	20,714
Thereafter	2,788,561
Total debt	2,986,953	$ 2,842,510
Unamortized discounts and loan costs	(43,028)
Total debt per balance sheet	$ 2,943,925	$ 2,803,543

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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