ACQUISITIONS AND DISPOSITIONS (Details) $ in Thousands			3 Months Ended								6 Months Ended	12 Months Ended
	Mar. 01, 2017 USD ($)	Jan. 28, 2017 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) item	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 12, 2017 USD ($)
Gain (loss) on disposal of operating assets												$ 3,868	$ (1,117)	$ 29,073
Corporate gains on sale of properties												125
Portion of refinanced mortgage proceeds used to acquire partner's interest												23,299	25,480
Aggregate principal amount of debt issued															$ 200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Building			$ 38,213								$ 38,213	38,213
Land			3,069								3,069	3,069
Improvements			957								957	957
Furniture, fixtures and equipment			590								590	590
Lease in place			714								714	714
Other identifiable assets			18								18	18
Total assets			43,561								43,561	43,561
Payment to acquire JV partner's interest												23,299	25,480
Assets acquired and consolidated into financial statements			43,561								$ 43,561	43,561
Equity in earnings from Real Estate and Other Affiliates												25,498	56,818	3,721
Revenues since the acquisition date			$ 300,983	$ 258,736	$ 308,639	$ 231,762	$ 278,546	$ 242,265	$ 273,514	$ 240,680		1,100,120	1,035,005	797,088
Pre-tax net loss since the acquisition date												$ 120,822	$ 320,776	$ 150,720
Constellation
Ownership interest (as a percent)		50.00%	50.00%								50.00%	50.00%
Portion of refinanced mortgage proceeds used to acquire partner's interest		$ 8,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Payment to acquire JV partner's interest		8,000
Purchase price of acquisition		$ 16,000
Liabilities acquired percentage		50.00%
Gain recognized from acquisition		$ 17,800
Equity in earnings from Real Estate and Other Affiliates												$ 300
Constellation | Construction Loan Payable
Construction loan		15,800
Constellation | Constellation Note Payable
Aggregate principal amount of debt issued		$ 24,200
Interest rate (as a percent)		4.07%
Las Vegas 51s
Ownership interest (as a percent)			50.00%								50.00%	50.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Adjustment to allocate from identified finite-lived intangibles			$ 7,900								$ 7,900	$ 7,900
Las Vegas 51s
Portion of refinanced mortgage proceeds used to acquire partner's interest	$ 16,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Total assets	$ 36,000
Economic/Legal Ownership	50.00%
Payment to acquire JV partner's interest	$ 16,400
Assets acquired and consolidated into financial statements	36,000
Liabilities assumed and consolidated into financial statements	3,200
Gain recognized from acquisition	$ 5,400
Contingent liability recorded per the terms of the purchase agreement			400								400	400
Adjustment to allocate from identified finite-lived intangibles			$ 24,900								$ 24,900	$ 24,900
Acquired intangible assets weighted average amortization period												11 years
Equity in earnings from Real Estate and Other Affiliates												$ 200
Revenues since the acquisition date												6,800
Pre-tax net loss since the acquisition date												(600)
Five non-core assets | Disposal by Sale
Number of assets sold | item											5
Proceeds from Sale of Real Estate											$ 52,600
Gain (loss) on disposal of operating assets											$ 23,100
Corporate gains on sale of properties												19,200
Gain (Loss) on Disposition of Business												$ 3,900