Investments - Additional Information (Detail) |
6 Months Ended |
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Sep. 30, 2015 | |
| Minimum [Member] | |
| Investment Securities [Line Items] | |
| Treasury with original maturities period | 3 months |
| Maximum [Member] | |
| Investment Securities [Line Items] | |
| Investment maturity date range end | Aug. 10, 2016 |
| 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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- Definition Investment Securities [Line Items] No definition available.
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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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