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Schedule of Compensation Cost for Stock Options and Unvested Shares (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes |  |  |  | $ 11,162 | $ 9,755 |
Stock Option |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | 1,344 | 1,359 |  | 5,254 | 5,785 |
Income tax benefit | (442) | (390) |  | (1,642) | (1,842) |
Total expense after income taxes | 902 | 969 |  | 3,612 | 3,943 |
Stock Option | Cost Of Goods Sold |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | 111 | 202 |  | 593 | 645 |
Stock Option | Selling, General And Administrative Expenses |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | 1,233 | 1,157 |  | 4,661 | 5,140 |
Unvested Shares |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | 1,642 | (1,686) | [1] | 5,908 | 3,970 | [1]
Income tax benefit | (412) | (451) | [1] | (1,552) | (1,537) | [1]
Total expense after income taxes | 1,230 | (2,137) | [1] | 4,356 | 2,433 | [1]
Unvested Shares | Cost Of Goods Sold |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | 199 | 197 | [1] | 802 | 495 | [1]
Unvested Shares | Selling, General And Administrative Expenses |  |  |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |
Total expense before income taxes | $ 1,443 | $ (1,883) | [1] | $ 5,106 | $ 3,475 | [1]
[1] | Reflects the forfeiture of unvested shares related to the Company's transition to a new CEO in August 2011.

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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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