Investments In Unconsolidated Joint Ventures (12 Vreeland Associates, L.L.C.) (Details) (12 Vreeland [Member], USD $)

12 Months Ended

Dec. 31, 2011

Sep. 08, 2006

sqft

12 Vreeland [Member]

Schedule of Equity Method Investments [Line Items]

Percentage of interest in venture

50.00%

Mortgage loans, carrying amount

$ 1,200,000

Interest rate

6.90%

Mortgage loan, maturity date

Jul. 01, 2012

Area of office property

139,750

Holding and distribution pattern under operating agreement

Under the operating agreement of 12 Vreeland Associates, L.L.C., M-C Vreeland has a 50 percent interest, with S/K Florham Park Associates, L.L.C. (the managing member) and its affiliate holding the other 50 percent.