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11. Fair Value measurements (Details-Residual interest) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Mar. 31, 2014
Mar. 31, 2013
Residual Interest in Securitizations:            
Balance at beginning of period $ 260 $ 2,246 $ 854 $ 4,824 $ 445 $ 3,505
Cash paid (received) during period (209) (820) (1,039) (3,398)    
Included in earnings 84 0 320 0    
Balance at end of period $ 135 $ 1,426 $ 135 $ 1,426 $ 445 $ 3,505