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15. Fair Value measurements - Reconciliation for level 3 (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Residual Interest in Securitizations:    
Balance at beginning of period $ 4,824 $ 4,414
Cash paid (received) during period (3,970) (48)
Included in earnings 0 458
Balance at end of period 854 4,824
Warrant Derivative Liability:    
Balance at beginning of period 355 967
Included in earnings 228 695
Reclassification to equity (583) (1,307)
Balance at end of period $ 0 $ 355