Acquisitions and Other Investments - Allocation of Purchase Price (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Oct. 15, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 1,228,422		$ 1,008,097	$ 989,685
Pinnacle
Business Acquisition [Line Items]
Cash and restricted cash		$ 124,231
Assets held for sale		667,036
Other current assets		80,622
Property and equipment - non-Pinnacle Master Lease		318,856
Property and equipment - Pinnacle Master Lease		3,984,119
Goodwill		219,531
Other long-term assets		38,767
Total assets		6,799,562
Long-term financing obligation, including current portion		3,427,016
Other current liabilities		200,547
Deferred tax liabilities		339,149
Other long-term liabilities		16,635
Total liabilities		3,983,347
Net assets acquired		2,816,215
Pinnacle | Customer relationships
Business Acquisition [Line Items]
Amortizing intangible assets		22,400
Pinnacle | Gaming licenses
Business Acquisition [Line Items]
Indefinite-lived intangible assets		1,046,000
Pinnacle | Trademarks
Business Acquisition [Line Items]
Indefinite-lived intangible assets		$ 298,000