Annual report pursuant to Section 13 and 15(d)

21. Net Gain on Trading Securities (Details)

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21. Net Gain on Trading Securities (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Net gain recognized during the period on trading securities sold during the period $ 25,535  
Net unrealized gain/loss recognized during the reporting period on trading securities still held at the reporting date (5,373)  
Net gain recognized during the period on trading securities $ 20,162  
(Recast)    
Net gain recognized during the period on trading securities sold during the period   $ 17,725
Net unrealized gain/loss recognized during the reporting period on trading securities still held at the reporting date   16,502
Net gain recognized during the period on trading securities   $ 34,227