MORTGAGE LOANS RECEIVABLE (Details)		12 Months Ended
		Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Mortgage Loans on Real Estate [Line Items]
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	[1],[2]	$ 4,752,000
Mortgage recourse loan		4,752,000
First Mortgage [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage Loans on Real Estate, New Mortgage Loans		$ 0	$ 0	$ 0
Number of mortgage loans receivable		2	2
Effective interest rate (in hundredths)		5.25%

[1] Changes in mortgage loans follow: Years Ended December 31,2016 2015 2014(In thousands)Balance at beginning of year$4,875 4,991 8,870Advances on mortgage loans receivable— — —Payments on mortgage loans receivable(123) (116) (3,902)Amortization of discount on mortgage loan receivable— — 23Balance at end of year$4,752 4,875 4,991

[2] The aggregate cost for federal income tax purposes is approximately $4.75 million. The federal income tax return for the year ended December 31, 2016, has not been filed and, accordingly, the income tax basis of mortgage loans as of December 31, 2016, is based on preliminary data.