v2.4.0.6

Valuation and Qualifying Accounts | 12 Months Ended
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Mar. 31, 2013
Valuation and Qualifying Accounts | SCHEDULE II EnerSys Valuation and Qualifying Accounts (In Thousands)
|  | Balance at Beginning of Period |  |  | Additions Charged to Expense |  |  | Charge-Offs |  |  | Purchase accounting adjustments |  |  | Other(1) |  |  | Balance at End of Period |
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fiscal year ended March 31, 2011 |  | $ | 9,879 |  |  | $ | 1,513 |  |  | $ | (1,673 | ) |  | $ | — |  |  | $ | 828 |  |  | $ | 10,547 |
Fiscal year ended March 31, 2012 |  |  | 10,547 |  |  |  | 1,395 |  |  |  | (2,012 | ) |  |  | — |  |  |  | 92 |  |  |  | 10,022 |
Fiscal year ended March 31, 2013 |  |  | 10,022 |  |  |  | 998 |  |  |  | (1,568 | ) |  |  | — |  |  |  | (160 | ) |  |  | 9,292 |
Allowance for inventory valuation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fiscal year ended March 31, 2011 |  | $ | 11,678 |  |  | $ | 8,329 |  |  | $ | (5,361 | ) |  | $ | — |  |  | $ | 406 |  |  | $ | 15,052 |
Fiscal year ended March 31, 2012 |  |  | 15,052 |  |  |  | 7,659 |  |  |  | (7,657 | ) |  |  | — |  |  |  | (223 | ) |  |  | 14,831 |
Fiscal year ended March 31, 2013 |  |  | 14,831 |  |  |  | 7,337 |  |  |  | (4,584 | ) |  |  | — |  |  |  | (212 | ) |  |  | 17,372 |
Deferred tax asset—valuation allowance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fiscal year ended March 31, 2011 |  | $ | 58,382 |  |  | $ | 825 |  |  | $ | (2,444 | ) |  | $ | 5,340 |  |  | $ | 1,514 |  |  | $ | 63,617 |
Fiscal year ended March 31, 2012 |  |  | 63,617 |  |  |  | 2,457 |  |  |  | (7,528 | ) |  |  | 1,124 |  |  |  | (3,311 | ) |  |  | 56,359 |
Fiscal year ended March 31, 2013 |  |  | 56,359 |  |  |  | 3,829 |  |  |  | (3,259 | ) |  |  | — |  |  |  | (2,387 | ) |  |  | 54,542 |
(1) | Primarily the impact of currency changes.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration