v2.4.0.6

Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2013
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.
|  | March 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Net earnings attributable to EnerSys stockholders |  | $ | 166,508 |  |  | $ | 144,003 |  |  | $ | 113,426 |
Weighted-average number of common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 48,022,005 |  |  |  | 48,748,205 |  |  |  | 49,376,132 |
Dilutive effect of: |  |  |  |  |  |  |  |  |  |  |  |
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired |  |  | 593,422 |  |  |  | 467,830 |  |  |  | 668,114 |
Convertible Notes |  |  | 20,022 |  |  |  | — |  |  |  | — |
Diluted weighted-average number of common shares outstanding |  |  | 48,635,449 |  |  |  | 49,216,035 |  |  |  | 50,044,246 |
Basic earnings per common share attributable to EnerSys stockholders |  | $ | 3.47 |  |  | $ | 2.95 |  |  | $ | 2.30 |
Diluted earnings per common share attributable to EnerSys stockholders |  | $ | 3.42 |  |  | $ | 2.93 |  |  | $ | 2.27 |
Anti-dilutive equity awards not included in diluted weighted-average common shares |  |  | — |  |  |  | 221,097 |  |  |  | — |

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + 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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