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

Notes Receivable (Components Of Notes Receivable) (Details)

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Notes Receivable (Components Of Notes Receivable) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 5,200 $ 15,497
Secured Notes Receivable [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable 4,794 5,114
Notes Receivable From Lessee Restructurings [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 406 $ 10,383