FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets:
Non-mortgage loans receivable, net	$ 38,363	$ 37,926
Liabilities:
Redeemable OP unitholder interests	209,500	188,500
Government-sponsored pooled loan investments
Assets:
Government-sponsored pooled loan investments	64,390	63,679
Carrying Amount
Assets:
Cash and cash equivalents	57,322	53,023
Secured loans receivable, net	939,171	793,433
Non-mortgage loans receivable, net	38,363	37,926
Liabilities:
Senior notes payable and other debt, gross	10,968,271	11,271,020
Derivative instruments and other liabilities	5,505	2,696
Redeemable OP unitholder interests	209,511	188,546
Carrying Amount \| Government-sponsored pooled loan investments
Assets:
Government-sponsored pooled loan investments	64,390	63,679
Fair Value
Assets:
Cash and cash equivalents	57,322	53,023
Secured loans receivable, net	965,807	816,849
Non-mortgage loans receivable, net	39,750	38,806
Liabilities:
Senior notes payable and other debt, gross	11,440,378	11,384,880
Derivative instruments and other liabilities	5,505	2,696
Redeemable OP unitholder interests	209,511	188,546
Fair Value \| Government-sponsored pooled loan investments
Assets:
Government-sponsored pooled loan investments	$ 64,390	$ 63,679

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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