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5. Interest Income and Interest Expense (Tables)
3 Months Ended
Mar. 31, 2016
Interest Income And Interest Expense Tables  
Interest income
   Three Months Ended 
   March 31, 
   2016   2015 
   (In thousands) 
         
Interest on finance receivables  $96,628   $82,321 
Residual interest income       37 
Other interest income   35    1 
           
Interest income  $96,663   $82,359 
Interest expense
    Three Months Ended  
    March 31,  
    2016     2015  
    (In thousands)  
             
Securitization trust debt   $ 14,764     $ 10,876  
Warehouse lines of credit     2,422       1,473  
Residual interest financing     271       423  
Subordinated renewable notes     364       401  
Interest expense   $ 17,821     $ 13,173