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Schedule of Compensation Cost for Stock Options, Unvested Shares and Performance Share Units (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes |  |  | $ 13,464 | $ 11,162
Stock Option |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 1,332 | 1,344 | 5,044 | 5,254
Income tax benefit | (439) | (442) | (1,620) | (1,642)
Total expense after income taxes | 893 | 902 | 3,424 | 3,612
Stock Option | Cost Of Goods Sold |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 94 | 111 | 385 | 593
Stock Option | Selling, General And Administrative Expenses |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 1,238 | 1,233 | 4,659 | 4,661
Unvested Shares |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 2,415 | 1,642 | 7,786 | 5,908
Income tax benefit | (551) | (412) | (1,864) | (1,552)
Total expense after income taxes | 1,864 | 1,230 | 5,922 | 4,356
Unvested Shares | Cost Of Goods Sold |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 338 | 199 | 1,065 | 802
Unvested Shares | Selling, General And Administrative Expenses |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 2,077 | 1,443 | 6,721 | 5,106
Performance Shares |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 229 |  | 634 |
Income tax benefit | (82) |  | (195) |
Total expense after income taxes | 147 |  | 439 |
Performance Shares | Cost Of Goods Sold |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | 0 |  | 0 |
Performance Shares | Selling, General And Administrative Expenses |  |  |  |
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |
Total expense before income taxes | $ 229 |  | $ 634 |

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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 + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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