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Subsequent Events (Details) - $ / shares |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
May. 09, 2016 | Aug. 04, 2015 | Jul. 01, 2015 | May. 11, 2015 | Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Subsequent Event [Line Items] |  |  |  |  |  |  |
Options granted, shares |  |  |  |  | 208,200 | 317,900 | 227,700
Options granted, weighted-average exercise price (in USD per share) |  |  |  |  | $ 42.13 | $ 33.54 | $ 29.94
Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Options granted, shares | 236,116 |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Restricted common stock units granted in period, shares |  | 2,075 | 2,841 | 185,904 |  |  |
Award vesting period |  | 1 year | 3 years |  |  |  |
Restricted Stock Units (RSUs) | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Restricted common stock units granted in period, shares | 51,266 |  |  |  |  |  |
Award vesting period | 3 years |  |  |  |  |  |
Stock Options |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Restricted common stock units granted in period, shares |  |  | 13,861 |  |  |  |
Options granted, shares |  |  |  | 186,302 |  |  |
Award vesting period |  |  | 3 years | 3 years |  |  |
Award vesting rights, percentage |  |  | 33.30% | 33.30% |  |  |
Expiration period |  |  | 10 years |  |  |  |
Options granted, weighted-average exercise price (in USD per share) |  |  | $ 46.58 | $ 41.44 |  |  |
Stock Options | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Award vesting period | 3 years |  |  |  |  |  |
Award vesting rights, percentage | 33.30% |  |  |  |  |  |
Expiration period | 10 years |  |  |  |  |  |
Options granted, weighted-average exercise price (in USD per share) | $ 57.18 |  |  |  |  |  |

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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