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Share-Based Compensation (Tables)
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12 Months Ended |
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Dec. 28, 2013
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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| Number and Weighted Average Exercise Price of Options Issued and Outstanding under All Stock Option Plans |
The number and weighted average exercise price of options issued and outstanding under all stock option plans are as follows (in thousands, except for exercise price): | | | | | | | | | | | | | | | | | | | | | | | Year ended December 28, 2013 | | Year ended December 29, 2012 | | Year ended December 31, 2011 | | Shares | | Average Exercise Price | | Shares | | Average Exercise Price | | Shares | | Average Exercise Price | Options outstanding, beginning of period | 8,368 |
| | $ | 22.78 |
| | 8,277 |
| | $ | 22.68 |
| | 6,941 |
| | $ | 21.32 |
| Granted | 1,653 |
| | $ | 21.17 |
| | 754 |
| | $ | 22.17 |
| | 2,277 |
| | $ | 23.85 |
| Canceled | (795 | ) | | $ | 24.53 |
| | (447 | ) | | $ | 27.30 |
| | (312 | ) | | $ | 27.62 |
| Expired | — |
| | $ | — |
| | — |
| | $ | — |
| | — |
| | $ | — |
| Exercised | (315 | ) | | $ | 10.49 |
| | (216 | ) | | $ | 7.62 |
| | (629 | ) | | $ | 9.44 |
| Options outstanding, end of period | 8,911 |
| | $ | 22.76 |
| | 8,368 |
| | $ | 22.78 |
| | 8,277 |
| | $ | 22.68 |
| Options exercisable, end of period | 5,188 |
| | $ | 22.69 |
| | 4,632 |
| | $ | 21.29 |
| | 3,636 |
| | $ | 19.45 |
| Options available for grant, end of period | 5,795 |
| | | | 4,934 |
| | | | 3,493 |
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| Range of Assumptions Used and Resulting Weighted-Average Fair Value of Options Granted at Date of Grant |
The range of assumptions used and the resulting weighted-average fair value of options granted at the date of grant were as follows: | | | | | | | | Year ended December 28, 2013 | | Year ended December 29, 2012 | | Year ended December 31, 2011 | Risk-free interest rate | 0.7% to 1.8% | | 0.7% to 1.3% | | 0.9% to 2.5% | Expected term | 5.1 years to 5.5 years | | 5.5 years to 5.5 years | | 5.3 years to 5.5 years | Estimated volatility | 31.2% to 39.6% | | 36.6% to 42.6% | | 36.7% to 43.2% | Expected dividends | 0% | | 0% | | 0% | Weighted-average fair value of options granted | $7.53 per share | | $7.98 per share | | $9.44 per share |
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| Total Share-Based Compensation Expense Included in Consolidated Statements of Comprehensive Income |
The following table presents the total share-based compensation expense that is included in each functional line item of the consolidated statements of comprehensive income (in thousands): | | | | | | | | | | | | | | Year ended December 28, 2013 | | Year ended December 29, 2012 | | Year ended December 31, 2011 | Cost of goods sold | $ | 354 |
| | $ | 480 |
| | $ | 383 |
| Selling, general and administrative | 9,407 |
| | 10,775 |
| | 10,268 |
| Research and development | 1,913 |
| | 2,842 |
| | 3,025 |
| Total | $ | 11,674 |
| | $ | 14,097 |
| | $ | 13,676 |
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| Number and Weighted Average Exercise Price of Outstanding and Exercisable Options |
The schedule below reflects the number and weighted average exercise price of outstanding and exercisable options segregated by exercise price ranges (in thousands, except remaining contractual life): | | | | | | | | | | | | | | | | | | December 28, 2013 | | December 29, 2012 | | Options Outstanding | | Options Exercisable | | Options Outstanding | | Options Exercisable | Range of Exercise Prices | Number of Options | | Average Remaining Contractual Life | | Number of Options | | Number of Options | | Average Remaining Contractual Life | | Number of Options | $2.75 to $4.00 | 279 |
| | 1.01 | | 279 |
| | 425 |
| | 1.49 | | 425 |
| $4.67 to $12.00 | 696 |
| | 2.46 | | 696 |
| | 745 |
| | 3.44 | | 745 |
| $12.87 to $16.00 | 549 |
| | 3.39 | | 549 |
| | 580 |
| | 4.39 | | 580 |
| $17.84 to $23.98 | 3,635 |
| | 8.06 | | 986 |
| | 2,592 |
| | 8.25 | | 662 |
| $24.00 to $28.99 | 1,708 |
| | 6.20 | | 1,077 |
| | 1,811 |
| | 6.98 | | 885 |
| $29.07 to $31.99 | 1,734 |
| | 5.37 | | 1,311 |
| | 1,902 |
| | 6.30 | | 1,090 |
| $32.21 to $38.30 | 117 |
| | 5.28 | | 98 |
| | 117 |
| | 6.28 | | 75 |
| $38.60 to $41.51 | 193 |
| | 4.40 | | 192 |
| | 196 |
| | 5.41 | | 170 |
| Total | 8,911 |
| | 6.12 | | 5,188 |
| | 8,368 |
| | 6.40 | | 4,632 |
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