Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 25, 2016	Feb. 28, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Operating Lease, Right-of-Use Asset			$ 63,623		$ 63,623		$ 65,000
Restricted cash for Development Projects				$ 22,414		$ 22,414		$ 21,039
Restricted cash for Development Projects			1,119		1,119			21,039
Customer Loyalty Program Liability, Current			2,300		2,300			2,200
Accrued rent								8,100
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent			1,900		1,900			2,300
Gaming Facility License Term						10 years
Allowance for doubtful accounts			537		537			$ 150
Interest charges capitalized			$ 200	$ 300	$ 300	$ 11,300
Common stock, shares issued (shares)			32,717,000		32,717,000			32,560,000
Total unrecognized compensation			$ 3,400		$ 3,400
Vesting period for unrecognized compensation cost to be recognized (in years)					3 years
Accumulated other comprehensive loss			61		$ 61			$ 219
Retained Earnings (Accumulated Deficit)			513,639		513,639			439,910
Operating Lease, Liability			74,468		74,468		$ 74,700
Montreign [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Gaming Facility License Fee	$ 51,000
Term Loan Facility, Term B Loan [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash for Development Projects			1,100		1,100			21,000
Payments of Debt Restructuring Costs		$ 675
Other Assets, Fair Value Disclosure			$ 0		$ 0			143
Kien Huat Realty III Limited Investment Agreement [Member] | Kien Huat Realty III Limited [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Common stock, shares issued (shares)			200,000		200,000
Initial Put Option [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Derivative Liability			$ 1,000		$ 1,000			900
New York State Racing, Pari-Mutual Wagering And Breeding Law [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents			$ 304		304			$ 373
License [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Amortization					$ 6,300
Finite-Lived Intangible Assets, Remaining Amortization Period					7 years