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Change in Number of Shares of Common Stock Outstanding (Detail)
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12 Months Ended | ||
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2011
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| Stockholders Equity [Line Items] | |||
| Shares outstanding, beginning balance | 47,800,129 | 50,034,353 | 48,581,832 |
| Purchase of treasury stock | (683,192) | (2,646,885) | |
| Shares issued as part of equity-based compensation plans, net of equity awards surrendered for option price and taxes | 723,267 | 412,661 | 1,452,521 |
| Shares outstanding, ending balance | 47,840,204 | 47,800,129 | 50,034,353 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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