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Changes in Non-Cash Working Capital (Tables)
 12 Months Ended
Mar. 31, 2014
Changes in Non-Cash Working Capital  
Schedule of changes in non-cash working capital

 

 
   Year ended March 31,  
 
   2014   2013   2012  

Margin deposits

   $ (14,137 ) $ (39,174 ) $ 99,804  

Trade receivables

     (3,383 )   (286 )   (45 )

Accrued receivables

     (44,459 )   (40,203 )   9,938  

Natural gas inventory

     3,676     125,042     (120,563 )

Prepaid expenses and other current assets

     358     (1,527 )   2,669  

Other assets

     (807 )   (1,105 )   (1,637 )

Trade payables

     (149 )   645     (316 )

Accrued liabilities

     68,108     8,456     (53,036 )

Income taxes

     8     (693 )   (579 )

Deferred revenue

     5,468     (10,667 )   6,498  

Due from related party

     (10 )   1,164     732  

Other long-term liabilities

     360     381     115  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Net changes in non-cash working capital

   $ 15,033   $ 42,033   $ (56,420 )
               
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