Commitments and Contingencies - Capital Commitments and Purchase Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Capital Expenditure Commitments
Capital expenditures under current construction program for 2018	$ 105,500
Contractual commitment to spend on capital expenditures	4,800
Purchase obligations
Obligations to purchase various goods and services	73,600
Obligations to be incurred in 2018	44,100
Other Lease Agreements
Operating Lease Commitments
Total rental expense	45,400	$ 40,300	$ 37,900
Future minimum lease commitments relating to the base lease rent portion of noncancelable operating leases
2018	8,609
2019	6,387
2020	4,692
2021	4,026
2022	3,504
Thereafter	60,517
Total	$ 87,735
Master Lease Agreement
Capital Expenditure Commitments
Minimum required facility maintenance spending, as a percent of annual net revenues	1.00%
Prairie State Gaming
Location share agreements
Location share payments	$ 29,700	$ 21,200	$ 6,000
Jamul Tribe | Term Loan C Facility
Other commitments
Unfunded loan commitments	$ 29,000