v3.7.0.1

Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
Reconciliation From Basic To Diluted Average Common Shares And Net Earnings Per Common Share | The following table sets forth the reconciliation from basic to diluted weighted-average number of common shares outstanding and the calculations of net earnings per common share attributable to EnerSys stockholders.
|  | Fiscal year ended March 31,
|  | 2017 |  | 2016 |  | 2015
Net earnings attributable to EnerSys stockholders |  | $ | 160,214 |  |  | $ | 136,150 |  |  | $ | 181,188 |
Weighted-average number of common shares outstanding: |  |  |  |  |  |
Basic |  | 43,389,333 |  |  | 44,276,713 |  |  | 45,606,317 |
Dilutive effect of: |  |  |  |  |  |
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired |  | 623,210 |  |  | 644,036 |  |  | 879,406 |
Convertible Notes |  | — |  |  | 553,381 |  |  | 1,567,006 |
Diluted weighted-average number of common shares outstanding |  | 44,012,543 |  |  | 45,474,130 |  |  | 48,052,729 |
Basic earnings per common share attributable to EnerSys stockholders |  | $ | 3.69 |  |  | $ | 3.08 |  |  | $ | 3.97 |
Diluted earnings per common share attributable to EnerSys stockholders |  | $ | 3.64 |  |  | $ | 2.99 |  |  | $ | 3.77 |
Anti-dilutive equity awards not included in diluted weighted-average common shares |  | 1,295 |  |  | — |  |  | — |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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