LOANS RECEIVABLE AND INVESTMENTS (Details) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended				9 Months Ended		9 Months Ended
	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Eight Percent Loan Receivable Maturing in 2017 [Member]	Dec. 31, 2012 Eight Percent Loan Receivable Maturing in 2017 [Member]	Sep. 30, 2014 Secured notes and loans receivable, net	Sep. 30, 2014 Other assets	Sep. 30, 2014 Government-sponsored pooled loan investments	Sep. 30, 2014 Marketable securities	Sep. 30, 2014 Senior unsecured corporate bonds	Sep. 30, 2014 Marketable equity securities	Sep. 30, 2014 Secured mortgage loans and other loan	Sep. 30, 2014 Unsecured loans receivable loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Secured loan receivable, carrying amount and amortized cost						$ 175,100,000								$ 344,948,000	$ 22,898,000
Mortgage loans, fair value														355,559,000	23,333,000
Available-for-sale securities, amortized cost basis										61,182,000	25,000,000
Available-for-sale securities, fair value and carrying amount										62,603,000	26,059,000
Available-for-sale securities, unrealized gain (loss)		2,480,000	2,480,000					1,421,000	1,059,000	1,421,000	1,059,000
Secured loans, unsecured loans, and other available-for-sale securities, carrying amount		456,508,000	456,508,000		414,800,000			407,551,000	48,957,000
Secured loans, unsecured loans, and other available-for-sale securities, amortized cost		454,028,000	454,028,000					406,130,000	47,898,000
Secured loans, unsecured loans, and other available-for-sale securities, fair value		467,554,000	467,554,000					418,162,000	49,392,000
Purchase of marketable securities			46,689,000	0								25,000,000	21,700,000
Investment in loans receivable and other			66,436,000	34,717,000						38,700,000
Number of loans sold														2	2
Secured loan receivable, amount							375,000,000
Secured loan receivable, interest rate						10.60%
Proceeds from sale or maturity of marketable securities		22,300,000	21,689,000	5,493,000
Recognized gain on sale of marketable securities		600,000
Gain on sale of marketable securities, previously recognized as an unrealized loss in accumulated other comprehensive income		200,000
Proceeds from sale of loans			52,100,000
Gain on the repayment of loans receivable	$ 4,000,000