Development Project Costs, Cash Collateral for Deposit Bond and Cash for Development Projects (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Feb. 29, 2016
Development Costs [Line Items]
Capitalized project development costs	$ 254,500		$ 202,400
Interest Expense	3,700
Project Development Costs Incurred	56,300	$ 44,300
Capitalized Project Development Costs, Period Increase	52,000	41,200
Development Projects expenses	4,269	3,067
Deposit Assets				$ 15,000
Restricted Cash and Cash Equivalents, Noncurrent	393,353		26,384
Land Lease Expense [Member]
Development Costs [Line Items]
Project Development Costs Incurred	2,600	2,600
Salary and Related Benefits [Member]
Development Costs [Line Items]
Project Development Costs Incurred	652
Bank Charges [Member]
Development Costs [Line Items]
Project Development Costs Incurred	353
Pre-opening Expense [Member]
Development Costs [Line Items]
Project Development Costs Incurred	218	113
Professional Services [Member]
Development Costs [Line Items]
Project Development Costs Incurred	35	194
Property Tax Expense [Member]
Development Costs [Line Items]
Project Development Costs Incurred	158	97
Insurance Expense [Member]
Development Costs [Line Items]
Project Development Costs Incurred	143	$ 106
Selling and Marketing Expense [Member]
Development Costs [Line Items]
Project Development Costs Incurred	93
Transferable Subscription Rights [Member]
Development Costs [Line Items]
Restricted Cash and Cash Equivalents, Noncurrent	$ 393,400		$ 26,400