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Investments - Additional Information (Detail)
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9 Months Ended |
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Dec. 31, 2014
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| Minimum [Member] | |
| Investment Securities [Line Items] | |
| Treasury with original maturities period | 3 months |
| Maximum [Member] | |
| Investment Securities [Line Items] | |
| Investment maturity date range end | Nov. 17, 2015 |
| Treasury with original maturities period | 1 year |
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- Definition
Original maturity period for held to maturity securities. No definition available.
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- Details
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- Definition
The maturity date of the investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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