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Fair Value of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Carrying Amount [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Note receivable $ 53,792 $ 54,788
Debt 988,731 1,042,933
Interest rate cap 71 0
Fair Value [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Note receivable 57,000 55,000
Debt 1,035,450 1,060,830
Interest rate cap $ 71 $ 0