Unconsolidated Real Estate Affiliates (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
SUMMARIZED COMBINED BALANCE SHEETS-UNCONSOLIDATED REAL ESTATE AFFILIATES
TOTAL ASSETS	$ 842,034	$ 835,050
TOTAL LIABILITIES	524,949	603,971
TOTAL LIABILITIES AND EQUITY	842,034	835,050
Unconsolidated Real Estate Affiliates [Member]
SUMMARIZED COMBINED BALANCE SHEETS-UNCONSOLIDATED REAL ESTATE AFFILIATES
TOTAL ASSETS	104,882	171,652
TOTAL LIABILITIES	91,176	152,155
Members' Equity	(13,706)	(19,497)
TOTAL LIABILITIES AND EQUITY	$ 104,882	$ 171,652