Development Projects Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Jan. 04, 2018	Dec. 28, 2017	Jun. 30, 2017	Feb. 29, 2016
Development Costs [Line Items]
Capitalized project development costs	$ 5,700	$ 566,800
Deposit Asset, Percent of Minimum Capital Investment Expended for Deposit Return						85.00%
Investment Returned after Requirement Met					$ 35,000
Restricted cash and cash equivalents for Development Projects	21,039	41,982	$ 26,384
Project development costs incurred	150,200	392,200
Deposit assets							$ 20,000	$ 15,000
Capitalized project development costs, period increase	137,600	370,700
Development Projects	12,574	21,558	12,970
Cash and cash equivalents	28,338	10,380	11,012
Short-term marketable securities	94,500	94,500
Construction Manager Costs [Member]
Development Costs [Line Items]
Capitalized project development costs	4,200	560,200
Architectural, Engineering, Construction Manager, and Subcontractor [Member]
Development Costs [Line Items]
Capitalized project development costs	1,500	6,600
Golf Course Project [Member]
Development Costs [Line Items]
Capitalized project development costs				$ 21,200
Land Lease Expense [Member]
Development Costs [Line Items]
Project development costs incurred	10,400	10,700	10,400
Salary and Related Benefits [Member]
Development Costs [Line Items]
Project development costs incurred		4,900
Bank Charges [Member]
Development Costs [Line Items]
Project development costs incurred		2,000
Selling and Marketing Expense [Member]
Development Costs [Line Items]
Project development costs incurred		900
Property Tax Expense [Member]
Development Costs [Line Items]
Project development costs incurred	400	600	400
Insurance Expense [Member]
Development Costs [Line Items]
Project development costs incurred	500	600	500
Professional Services [Member]
Development Costs [Line Items]
Project development costs incurred	300	600	300
Legal Expense [Member]
Development Costs [Line Items]
Project development costs incurred	200	300	200
Pre-opening Expense [Member]
Development Costs [Line Items]
Project development costs incurred	1,200	500	$ 1,200
Development Projects [Member] | Transferable Subscription Rights [Member]
Development Costs [Line Items]
Restricted cash and cash equivalents for Development Projects	20,100	$ 136,400
Cash and cash equivalents	41,900
Short-term marketable securities	$ 94,500