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Long-Term Debt Senior Secured Second Lien Notes (Details) - USD ($)
12 Months Ended
Aug. 01, 2013
Aug. 01, 2013
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Debt Instrument [Line Items]          
Associated costs paid     $ 0 $ 0 $ 36,033,000
Senior Secured Second Lien Notes due 2021 [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 735,000,000 $ 735,000,000      
Debt discount, percent 98.00% 98.00%      
Proceeds from Issuance of Senior Long-term Debt $ 720,300,000        
Debt instrument, interest rate 9.875% 9.875%   9.875%  
Debt instrument, redemption percentage   101.00%      
Repurchase of debt       $ 15,000,000  
Senior notes       720,000,000  
Associated costs paid       38,000  
Debt discount       (1,323,000)  
Repayment of long-term borrowings       13,715,000  
Acceleration of deferred financing costs and amortization of debt discount       $ 514,000  
Senior Secured Second Lien Notes due 2021 [Member] | Senior Notes [Member] | Maximum [Member]          
Debt Instrument [Line Items]          
Additional special interest annual rate interest, per year 1.00% 1.00%