Investments In Unconsolidated Joint Ventures (Mack-Green-Gale LLC/Gramercy Agreement) (Details) (USD $) | 3 Months Ended | 0 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 0 Months Ended | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2009
OPLP [Member] | Dec. 31, 2007
OPLP [Member] | Sep. 30, 2010
OPLP [Member] | May 09, 2006
OPLP [Member]
sqft | May 09, 2006
OPLP [Member]
Mack-Green [Member] | Apr. 29, 2009
Gramercy Agreement [Member] | May 09, 2006
Gramercy Agreement [Member] | Sep. 30, 2011
Gramercy Agreement [Member] | Sep. 30, 2010
Gramercy Agreement [Member] | Mar. 31, 2010
Gramercy Agreement [Member]
sqft | Mar. 31, 2009
Gramercy Agreement [Member] | Sep. 30, 2011
Gramercy Agreement [Member] | Sep. 30, 2010
Gramercy Agreement [Member] | Dec. 17, 2010
Gramercy Agreement [Member]
sqft | Dec. 31, 2008
Gramercy Agreement [Member] | May 09, 2006
Mack-Green [Member] | Apr. 29, 2009
Mack-Green [Member] | ||||||||||
| Percentage of interest in venture | 96.00% | 100.00% | 96.00% | 100.00% | ||||||||||||||||||||||
| Mortgage loans, carrying amount | $ 276,300,000 | $ 90,300,000 | ||||||||||||||||||||||||
| Mortgage finance on property obtained | 11,000,000 | |||||||||||||||||||||||||
| Number of properties | 6 | |||||||||||||||||||||||||
| Mortgage loan maturity date | May 2016 | May 2009 | ||||||||||||||||||||||||
| Area of office property | 3,500,000 | |||||||||||||||||||||||||
| Area of office property | 121,314 | 198,376 | ||||||||||||||||||||||||
| Spread over LIBOR | 275 | 275 | ||||||||||||||||||||||||
| Interest rate cap | 3.15% | |||||||||||||||||||||||||
| Venture sale of real estate | 83,500,000 | 13,900,000 | ||||||||||||||||||||||||
| Management, leasing and other services fees | 108,000 | 223,000 | 382,000 | 690,000 | ||||||||||||||||||||||
| Acquisition cost | 125,000,000 | |||||||||||||||||||||||||
| Mortgage loans on real estate bearing weighted average fixed interest rate | 185,000,000 | |||||||||||||||||||||||||
| Weighted average fixed interest rate | 6.26% | |||||||||||||||||||||||||
| Repayments of debt | 26,800,000 | |||||||||||||||||||||||||
| Number of owned office properties | 25 | |||||||||||||||||||||||||
| Number of properties sold | 8 | 1 | ||||||||||||||||||||||||
| Venture gain (loss) on sale of real estate | (22,300,000) | |||||||||||||||||||||||||
| Impairment charge on property | $ 32,300,000 | |||||||||||||||||||||||||
| Sharing percent of amount realized | 50.00% | |||||||||||||||||||||||||
| Holding and distribution pattern under operating agreement | The Mack-Green operating agreement generally provided for profits and losses to be allocated as follows:
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