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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Share Based Compensation Included In Net Income | Total share based compensation included in net income for the years ended December 29, 2017, December 30, 2016, and January 1, 2016 is as follows:
|  | Year Ended |
|  | December 29, |  |  | December 30, |  |  | January 1, |
|  | 2017 |  |  | 2016 |  |  | 2016 |
Restricted stock units |  | $ | 7,801 |  |  | $ | 7,550 |  |  | $ | 6,776 |
Stock options and stock appreciation rights |  |  | — |  |  |  | — |  |  |  | 2,658 |
Common stock subject to vesting requirements |  |  | 2,515 |  |  |  | 1,215 |  |  |  | 927 |
|  | $ | 10,316 |  |  | $ | 8,765 |  |  | $ | 10,361 |
Summary Of Stock Option Activity Under The Company's Stock Option Plans | Stock option activity under the Company’s stock option plans for the year ended December 29, 2017 is summarized as follows:
|  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding as of December 30, 2016 |  |  | 230,167 |  |  | $ | 4.00 |  |  |  |  |  |  |  |  |
Exercised |  |  | (50,000 | ) |  |  | 4.00 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding as of December 29, 2017 |  |  | 180,167 |  |  | $ | 4.00 |  |  |  | 4.22 |  |  | $ | 2,109,818 |
Exercisable at December 29, 2017 |  |  | 180,167 |  |  | $ | 4.00 |  |  |  | 4.22 |  |  | $ | 2,109,818 |
A summary of the Company’s stock option activity for the years ended December 30, 2016 and January 1, 2016 was as follows:
|  | December 30, 2016 |  |  | January 1, 2016 |
|  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Option Shares |  |  | Weighted Average Exercise Price |
Outstanding at beginning of year |  |  | 230,167 |  |  | $ | 4.00 |  |  |  | 297,667 |  |  |  | 4.00 |
Exercised |  |  | — |  |  |  | — |  |  |  | (67,500 | ) |  |  | 3.99 |
Forfeited or expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at end of year |  |  | 230,167 |  |  | $ | 4.00 |  |  |  | 230,167 |  |  | $ | 4.00 |
Exercisable at end of year |  |  | 230,167 |  |  | $ | 4.00 |  |  |  | 90,167 |  |  | $ | 4.00 |
Other Information Pertaining To Stock Option Activity | Other information pertaining to stock option activity during the years ended December 29, 2017, December 30, 2016, and January 1, 2016 was as follows (in thousands):
|  | Year Ended |
|  | December 29, 2017 |  |  | December 30, 2016 |  |  | January 1, 2016 |
Total intrinsic value of stock options exercised |  | $ | 803 |  |  | $ | — |  |  | $ | 660 |
Summary Of Activity For Common Stock Subject To Vesting Requirements | The activity for common stock subject to vesting requirement s for the year ended December 29, 2017 was as follows:
|  | Number of Shares of Common Stock Subject to Vesting Requirements |  |  | Weighted Average Grant-Date Fair Value |
Nonvested balance as of December 30, 2016 |  |  | 505,060 |  |  | $ | 9.00 |
Granted |  |  | 182,279 |  |  |  | 19.82 |
Vested |  |  | (248,587 | ) |  |  | 9.11 |
Forfeited |  |  | (7,728 | ) |  |  | 8.99 |
Nonvested balance as of December 29, 2017 |  |  | 431,024 |  |  | $ | 13.52 |
Stock Appreciation Rights (SARs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Stock Option Activity Under The Company's Stock Option Plans | SAR activity for the year ended December 29, 2017 was as follows:
|  | Number of SARs |  |  | Weighted Average Exercise Price |  |  | Weighted Average Fair Value |
Outstanding as of December 30, 2016 |  |  | 2,916,563 |  |  | $ | 4.00 |  |  |  | 1.31 |
Expired |  |  | — |  |  |  | — |  |  |  | — |
Outstanding as of December 29, 2017 |  |  | 2,916,563 |  |  | $ | 4.00 |  |  | $ | 1.31 |
Exercisable at December 29, 2017 |  |  | 2,916,563 |  |  | $ | 4.00 |  |  | $ | 1.31 |
Summary Of Assumptions Used To Determine Fair Value | The following assumptions were used to determine the fair value of the SARs granted to employees:
Expected volatility |  |  | 43 | %
Risk-free rate |  | 0.35% -1.00% |
Expected term (in years) |  | 2-6 |
Restricted Stock Units (RSUs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Restricted Stock Unit Activity | Restricted stock unit activity for the year ended December 29, 2017, was as follows:
|  | Number of Restricted Stock Units |  |  | Weighted Average Grant-Date Fair Value |
Nonvested balance as of December 30, 2016 |  |  | 1,779,480 |  |  | $ | 9.02 |
Granted |  |  | 674,592 |  |  |  | 16.60 |
Vested |  |  | (862,731 | ) |  |  | 7.77 |
Forfeited |  |  | (71,703 | ) |  |  | 13.24 |
Nonvested balance as of December 29, 2017 |  |  | 1,519,638 |  |  | $ | 12.96 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + 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=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&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 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&loc=d3e5070-113901 + Details
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