Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Notes Receivable (Minimum Future Receipts Under Notes Receivable) (Details)

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Notes Receivable (Minimum Future Receipts Under Notes Receivable) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Notes Receivable [Abstract]  
2012 $ 4,289
2013 911
2014   
2015   
2016   
Thereafter   
Minimum future notes receivable $ 5,200