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Basis Of Presentation And Significant Accounting Policies (Notes Receivable And Related Allowance For Credit Losses) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Notes Receivable [Line Items]    
Notes receivable, gross $ 59,683 $ 57,841
Allowance for credit losses (27,048) (26,865)
Notes receivable, net $ 32,635 $ 30,976