XML 39 R26.htm IDEA: XBRL DOCUMENT v2.4.1.9
Borrowings - Additional Information (Detail) (USD $)
Dec. 31, 2014
Mar. 31, 2014
Line of Credit Facility [Line Items]    
Letters of credit issued percentage of cash collateralized basis 100.00%msn_LettersOfCreditIssuedPercentageOfCashCollateralizedBasis  
Outstanding letters of credit $ 0us-gaap_LettersOfCreditOutstandingAmount  
Long-term borrowings $ 0us-gaap_LongTermDebt $ 0us-gaap_LongTermDebt