Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Stock-based compensation expense	$ 8,998	$ 15,038
Accrued expenses	42,897	39,474
Loan to the JIVDC	0	26,237
Financing obligations associated with Master Leases	1,919,718	900,311
Unrecognized tax benefits	6,732	6,565
Investments in unconsolidated affiliates	3,579	0
Net operating losses, interest limitation and tax credit carryforwards	122,785	59,842
Gross deferred tax assets	2,104,709	1,047,467
Less: Valuation allowance	(89,508)	(113,699)
Total deferred tax assets	2,015,201	933,768
Deferred tax liabilities:
Property and equipment, non-Master Leases	(47,308)	(33,148)
Property and equipment, Master Leases	(1,599,907)	(469,363)
Investments in unconsolidated affiliates	0	(1,218)
Undistributed foreign earnings	(349)	(2,061)
Intangibles	(287,025)	(37,035)
Total deferred tax liabilities	(1,934,589)	(542,825)
Noncurrent deferred tax assets, net	$ 80,612	$ 390,943