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Valuation and Qualifying Accounts | 12 Months Ended
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Mar. 31, 2012
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | Valuation and Qualifying Accounts Schedule II — Valuation and Qualifying Accounts Years ended March 31, 2012, 2011 and 2010 (In thousands)
Classification |  | Balance at beginning of year |  |  | Charged to costs and expenses |  |  | Deductions |  |  | Balance at end of year |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 661 |  |  | $ | 226 |  |  | $ | (255 | ) |  | $ | 632 |
2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 1,223 |  |  | $ | 172 |  |  | $ | (734 | ) |  | $ | 661 |
2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 2,535 |  |  | $ | 220 |  |  | $ | (1,532 | ) |  | $ | 1,223 |

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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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