Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)		1 Months Ended	3 Months Ended
	Feb. 25, 2016	Feb. 28, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 05, 2018	Jan. 24, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash for Development Projects			$ 33,799,000	$ 7,605,000			$ 41,982,000	$ 26,384,000
Restricted cash and investments for Development Projects			67,199,000				136,431,000
Restricted Cash and Investments							136,400,000
Customer Loyalty Program Liability, Current			1,200,000				324,000
Accrued rent			7,900,000				8,300,000
Gaming Facility License Term				10 years
Restricted cash and investments for Development Projects			33,800,000				41,900,000
Allowance for doubtful accounts			171,000				$ 171,000
Interest charges capitalized			$ 10,100,000	$ 3,700,000
Common stock, shares issued (shares)			32,560,000		200,000		31,156,000
Exercise price of right (usd per right)					$ 81.50
Total unrecognized compensation			$ 3,000,000
Vesting period for unrecognized compensation cost to be recognized (in years)			3 years
Accumulated other comprehensive loss			$ 200,000				$ 315,000
Short-term Investments			33,400,000				94,500,000
Retained Earnings (Accumulated Deficit)			322,029,000				301,032,000
Option Matching Rights [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Common stock, shares issued (shares)						1,666
Exercise price of right (usd per right)						$ 15.00
Montreign [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Gaming Facility License Fee	$ 51,000,000
Term Loan Facility, Term B Loan [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Payments of Debt Restructuring Costs		$ 675,000
Other Assets, Fair Value Disclosure			222,000				251,000
Commercial Paper [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term Investments			26,400,000				59,400,000
US Treasury Notes Securities [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term Investments			7,000,000				$ 35,100,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			54,000
Other Accrued Liabilities			54,000
Retained Earnings (Accumulated Deficit)			$ 54,000
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