Contingencies and Commitments (Details) $ in Thousands			1 Months Ended			12 Months Ended
	Jul. 31, 2014 USD ($)	Mar. 20, 2014 USD ($)	Oct. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Jan. 31, 2010 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2009 USD ($) item	May 17, 2017 USD ($)	May 31, 2012 USD ($)	Sep. 30, 2011 USD ($)	May 31, 2010 USD ($)	Jun. 30, 2009 USD ($)	Feb. 28, 2006 USD ($)
Contingencies and Commitments
Proceeds from sale of property and equipment						$ 6,387	$ 2,744	$ 1,899
Long Island Expressway/Cross Island Parkway Matter
Contingencies and Commitments
Estimated value of project completed in Feb. 2006															$ 130,000
Value of claim filed				$ 50,700
Amount receivable as per final agreement												$ 500
Value of counterclaim filed											$ 151,000
Fontainebleau Matter
Contingencies and Commitments
Number of rooms in hotel/casino complex | item									3,800
Total outstanding liens on property, including subcontractors' liens														$ 44,000
Amount of court order in favor of plaintiff													$ 45,000
Proceeds from sale of property and equipment			$ 85,000		$ 150,000
Fontainebleau Matter | Other Unaffiliated Contractors, Subcontractors And Suppliers [Member]
Contingencies and Commitments
Total outstanding liens on property, including subcontractors' liens														$ 550,000
Westgate Planet Hollywood Matter
Contingencies and Commitments
Settlement on judgment		$ 19,700
Value of counterclaim filed									$ 45,000
Total outstanding liens on property, including subcontractors' liens									23,200
Settlement received							$ 16,000
Value of mechanic's lien release bond	$ 22,300								22,300
Value of cross complaint filed									$ 51,000
Value of supersedeas bond	1,700
Total value of security	$ 24,000
Total Value Of Security, Interest And Fees						$ 4,000
Damages Awarded On Cross Complaint Expected Insurance Recovery		$ 3,100
Minimum [Member] | Westgate Planet Hollywood Matter
Contingencies and Commitments
Total value of security										$ 20,000