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5. Interest Income and Interest Expense (Tables)
9 Months Ended
Sep. 30, 2016
Interest Income And Interest Expense Tables  
Interest income
   Three Months Ended   Nine Months Ended 
   September 30,   September 30, 
   2016   2015   2016   2015 
   (In thousands)   (In thousands) 
                 
Interest on finance receivables  $105,296   $90,564   $303,548   $257,757 
Residual interest income       20        85 
Other interest income   80        200    1 
Interest income  $105,376   $90,584   $303,748   $257,843 
Interest expense
   Three Months Ended   Nine Months Ended 
   September 30,   September 30, 
   2016   2015   2016   2015 
   (In thousands)   (In thousands) 
                 
Securitization trust debt  $18,228   $12,466   $49,867   $35,012 
Warehouse lines of credit   2,111    1,644    6,777    4,376 
Residual interest financing   227    338    744    1,111 
Subordinated renewable notes   327    400    1,054    1,210 
Interest expense  $20,893   $14,848   $58,442   $41,709