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18. Securities Repurchase Agreement Obligation (Tables)
 12 Months Ended
Mar. 31, 2018
Securities Repurchase Agreement Obligations  
Securities under repurchase agreement obligations
   March 31, 2018
   Interest rates and remaining contractual maturity of the agreements
   Average interest rate  Up to 30 days  30-90 days  Over 90 days  Total
                
                
Securities sold under repurchase agreements                         
Corporate equity   12.04%  $109,821   $8,960   $7,149   $125,930 
Corporate debt   10.64%   24,257    2,023    —      26,280 
Non-US sovereign debt   8.54%   2,565    —      —      2,565 
Total securities sold under repurchase agreements       $136,643   $10,983   $7,149   $154,775 

 

   March 31, 2017 (Recast)
   Interest rate and remaining contractual maturity of the agreements
   Average interest rate  Overnight and continuous  Up to 30 days  30-90 days  Total
                
Securities sold under repurchase agreements                         
Corporate equity   13.08%  $—     $29,926   $956   $30,882 
Corporate debt   11.83%   14,484    10,923    —      25,407 
Total securities sold under repurchase agreements       $14,484   $40,849   $956   $56,289