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Interest (Tables)
 12 Months Ended
Mar. 31, 2014
Interest  
Schedule of reconciliation of interest expense

 

 
   Year ended March 31,  
 
   2014   2013   2012  

Gross interest

   $ 62,961   $ 66,527   $ 74,765  

Deferred charges amortization

     3,354     3,411     3,942  

Capitalized interest

     —     (2,928 )   (4,077 )
               
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   $ 66,315   $ 67,010   $ 74,630  
               
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