EQUITY (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Unrealized Gains on Bonds Available-for-Sale, Balance at begining period	$ 119,239			$ 139,021
Unrealized Gains on Bonds Available-for-Sale, Unrealized net holding (losses) gains arising during period	(5,259)			(16,792)
Unrealized Gains on Bonds Available-for-Sale, Reversal of unrealized gains on sold/redeemed bonds	(76,362)	[1]	0	(76,960)	[1]	(52)
Unrealized Gains on Bonds Available-for-Sale, Reclassification of unrealized losses to income	939		2,282	1,772		3,369
Unrealized Gains on Bonds Available-for-Sale, Reclassification of unrealized gains to operations due to consolidation of funds and ventures	2,411	[1]	2,853	10,895	[1]	5,404
Unrealized Gains on Bonds Available-for-Sale, Net current period other comprehensive income	(83,093)			(102,875)
Unrealized Gains on Bonds Available-for-Sale, Balance at ending period	36,146			36,146
Foreign Currency Translation, Balance at begining period	(333)			(334)
Foreign Currency Translation, Unrealized net holding (losses) gains arising during period	43			44
Foreign Currency Translation, Reversal of unrealized gains on sold/redeemed bonds	0			0
Foreign Currency Translation, Reclassification of unrealized losses to income	0			0
Foreign Currency Translation, Reclassification of unrealized gains to operations due to consolidation of funds and ventures	0			0
Foreign Currency Translation, Net current period other comprehensive income	43		(24)	44		97
Foreign Currency Translation, Balance at ending period	(290)			(290)
Accumulated Other Comprehensive Income, Balance at beginning period	118,906			138,687
Accumulated Other Comprehensive Income, Unrealized net holding (losses) gains arising during period	(5,216)			(16,748)
Number of Options Expired/Forfeited	(76,362)			(76,960)
Accumulated Other Comprehensive Income, Reclassification of unrealized losses to income	939			1,772
Accumulated Other Comprehensive Income, Reclassification of unrealized gains to operations due to consolidation of funds and ventures	(2,411)			(10,895)
Accumulated Other Comprehensive Income, Net current period other comprehensive income	(83,050)		12,208	(102,831)		26,499
Accumulated Other Comprehensive Income, Balance at ending period	$ 35,856			$ 35,856

[1] Realized gains on bond redemptions included in “Net gains (losses) on assets and derivatives” on the consolidated statements of operations.