CONSOLIDATED FUNDS AND VENTURES (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Liabilities of CFVs:
Debt	$ 1,018,707	$ 1,042,959
Unfunded equity commitments to unconsolidated Lower Tier Property Partnerships	15,157	15,881
Other liabilities	16,179	15,145
Total liabilities of CFVs	1,066,110	1,090,027
Consolidated Funds and Ventures [Member]
Liabilities of CFVs:
Debt	49,903	55,433
Unfunded equity commitments to unconsolidated Lower Tier Property Partnerships	15,157	15,881
Other liabilities	7,883	6,150
Total liabilities of CFVs	$ 72,943	$ 77,464