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Investments in Loans (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Allowance for Losses and Impaired Loans        
Beginning balance $ 39,715 $ 66,769 $ 46,082 $ 69,691
Provision 500 950 1,000 2,900
Charge-offs, net of recoveries (338) (9,853) (7,205) (14,725)
Ending balance $ 39,877 $ 57,866 $ 39,877 $ 57,866