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Direct Financing Lease Receivables (Details 2) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Allowance for credit losses on direct financing lease receivables    
Beginning Balance $ 703 $ 903
Charged to earnings (22) 746
Deductions (143) (911)
Ending Balance $ 538 $ 738