EQUITY (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 212,910	$ 227,102
Other Comprehensive Income (Loss), before Tax Period Change [Abstract]
Reclassification of credit-related gains to the Consolidated Statements of Operations related to bond investments assessed as other-than-temporary-impairment ("OTTI")	0	6
Reinstatement of fair value gains related to bond investments due to deconsolidation of consolidated property partnerships	0	9,415
Net change AOCI	(30,064)	(3,456)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income, tax	2,902	0
Balance	281,125	212,910
AOCI
Balance	37,697	41,153
Other Comprehensive Income (Loss), before Tax Period Change [Abstract]
Net unrealized gains (losses), before tax	1,139	8,998
Reclassification of fair value gains on sold or redeemed bonds into the Consolidated Statements of Operations	28,301	21,875
Reclassification of credit-related gains to the Consolidated Statements of Operations related to bond investments assessed as other-than-temporary-impairment ("OTTI")		6
Reinstatement of fair value gains related to bond investments due to deconsolidation of consolidated property partnerships		9,415
Net change AOCI	(30,064)	(3,456)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income, tax	(2,902)
Balance	7,633	37,697
Investments in Debt Securities [Member]
Balance	37,625	44,459
Other Comprehensive Income (Loss), before Tax Period Change [Abstract]
Net unrealized gains (losses), before tax	1,244	5,620
Reclassification of fair value gains on sold or redeemed bonds into the Consolidated Statements of Operations	28,301	21,875
Reclassification of credit-related gains to the Consolidated Statements of Operations related to bond investments assessed as other-than-temporary-impairment ("OTTI")		6
Reinstatement of fair value gains related to bond investments due to deconsolidation of consolidated property partnerships		9,415
Net change AOCI	(29,959)	(6,834)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income, tax	(2,902)
Balance	7,666	37,625
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	72	(3,306)
Other Comprehensive Income (Loss), before Tax Period Change [Abstract]
Net unrealized gains (losses), before tax	(105)	3,378
Net change AOCI	(105)	3,378
Other Comprehensive Income (Loss), Tax [Abstract]
Balance	$ (33)	$ 72