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OTHER CHARGES (INCOME), NET (Details 2) (USD $)
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Debt Instrument      
Charges related to contractual obligation to reimburse the customer $ (53,233,000)us-gaap_OtherGeneralExpense $ 57,512,000us-gaap_OtherGeneralExpense $ (65,190,000)us-gaap_OtherGeneralExpense
Proceeds from warrants exercised   67,300,000us-gaap_ProceedsFromIssuanceOfWarrants  
Gain (Loss) on Sale of Investments   4,600,000us-gaap_GainLossOnSaleOfInvestments  
Net gain (loss) on fair value adjustment     74,400,000us-gaap_AssetsFairValueAdjustment
Warrants to purchase common shares      
Debt Instrument      
Loss on exercise of warrants   $ 7,100,000us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember