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Secured Debt and Credit Facilities, Other Notes Payable (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 9 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Aug. 09, 2010
Nichols
Dec. 31, 2011
Nichols Promissory Note
Aug. 09, 2010
Nichols Promissory Note
Aug. 09, 2010
Nichols Promissory Note
Nichols
Sep. 30, 2011
Los Angeles Promissory Note
Notes payables                
Nichols promissory note issued       $ 6.7     $ 6.7  
Interest rate           7.50%    
Outstanding principal balance under the Nichols Promissory Note 4.7 13.1     4.7      
Nichols promissory note, current         1.3      
Repayments of LA note payable $ 8.3 $ 0.7 $ 0         $ 7.0