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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 30, 2016
Share-Based Compensation [Abstract] |
Share-Based Compensation, Restricted Stock Units Award Activity | The number of unvested restricted stock unit awards outstanding as of December 30, 2016 is as follows (1):
|  |  |  |  |  | Weighted-average |  |  |
|  | Number |  | Weighted-average |  | remaining |  | Aggregate |
|  | of awards |  | grant date |  | contractual |  | intrinsic value |
|  | outstanding |  | fair value |  | term (years) |  | (in thousands) (2) |
Balance as of January 1, 2016 |  |  | 779,977 |  | $ | 31.88 |  |  |  |  |  |  |
Awards granted |  |  | 302,672 |  |  | 48.29 |  |  |  |  |  |  |
Awards vested |  |  | (384,822) |  |  | 34.02 |  |  |  |  |  |  |
Awards forfeited |  |  | (2,513) |  |  | 39.26 |  |  |  |  |  |  |
Balance as of December 30, 2016 |  |  | 695,314 |  | $ | 37.82 |  |  | 1.5 |  | $ | 41,927 |
(1) Does not include employee stock purchase plans or stock option plans. (2) The intrinsic value is calculated as the market value as of the end of the fiscal period. As reported by the NASDAQ Global Select Market, the market value as of December 30, 2016 was $60.30.
Stock Option Activity | Option activity is as follows(1):
|  |  |  |  |  | Weighted- |  | Aggregate |
|  |  |  | Weighted- |  | average |  | intrinsic |
|  | Number |  | average |  | remaining |  | value |
|  | of shares |  | exercise |  | contractual |  | (in |
|  | outstanding |  | price |  | term (years) |  | thousands) |
Balance as of January 1, 2016 |  |  | 285,000 |  | $ | 26.42 |  |  |  |  |  |  |
Options granted |  |  | 64,000 |  |  | 48.59 |  |  |  |  |  |  |
Options forfeited and expired |  |  | - |  |  | - |  |  |  |  |  |  |
Options exercised |  |  | (30,000) |  |  | 18.86 |  |  |  |  |  |  |
Balance as of December 30, 2016 |  |  | 319,000 |  | $ | 31.58 |  |  | 6.47 |  | $ | 9,162 |
Exercisable at December 30, 2016 |  |  | 188,750 |  | $ | 23.83 |  |  | 5.20 |  | $ | 6,884 |
(1) Does not include restricted stock or employee stock purchase plans.
The Assumptions Used to Value Option Grants | The assumptions used to value option grants for fiscal years 2016, 2015 and 2014 are as follows:
|  | Stock Option Plan |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Expected term (in years) |  |  | 6.0 |  |  |  | 6.1 |  |  |  | 6.1 |
Risk-free interest rate |  |  | 1.28 | % |  |  | 1.69 | % |  |  | 1.8 | %
Volatility |  |  | 25 | % |  |  | 27 | % |  |  | 32 | %
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Stock-Based Compensation Expense Recognized in Consolidated Statements of Income | The amount of stock-based compensation expense and the related income tax benefit recognized in the Company’s consolidated statements of income for fiscal years 2016, 2015 and 2014 is as follows:
|  | 2016 |  | 2015 |  | 2014 |
(In thousands) |  |  |  |  |  |  |
Compensation and related expenses: |  |  |  |  |  |  |  |  |  |
Restricted stock units |  | $ | 12,225 |  | $ | 11,907 |  | $ | 11,889 |
Stock option grants |  |  | 569 |  |  | 552 |  |  | 689 |
Sub-total |  |  | 12,794 |  |  | 12,459 |  |  | 12,578 |
General and administrative expenses: |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  | 539 |  |  | 500 |  |  | 501 |
Sub-total |  |  | 539 |  |  | 500 |  |  | 501 |
Total stock-based compensation expense |  | $ | 13,333 |  | $ | 12,959 |  | $ | 13,079 |
Income tax benefit |  | $ | 5,214 |  | $ | 5,068 |  | $ | 5,141 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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