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Stockholders' Equity and Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 29, 2018
Stockholders' Equity and Stock-Based Compensation [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of all stock option activity as of December 29, 2018 and changes during the year ended is as follows:
| Number of shares |  | Weighted-avg. exercise price per share |  | Weighted-avg. remaining contractual life
Options outstanding at January 2, 2016 | 850,732 |  |  | $ | 15.38 |  |  | 7.7 years
Granted | 1,547,184 |  |  | 9.53 |  |  |
Exercised | (28,000 | ) |  | 6.71 |  |  |
Forfeited | (4,000 | ) |  | 16.20 |  |  |
Expired | — |  |  | — |  |  |
Options outstanding at December 31, 2016 | 2,365,916 |  |  | 11.65 |  |  | 8.4 years
Granted | 956,809 |  |  | 12.29 |  |  |
Exercised | (27,968 | ) |  | 8.51 |  |  |
Forfeited | (4,000 | ) |  | 13.55 |  |  |
Expired | — |  |  | — |  |  |
Options outstanding at December 30, 2017 | 3,290,757 |  |  | 11.86 |  |  | 7.3 years
Granted | 637,115 |  |  | 18.82 |  |  |
Exercised | (153,717 | ) |  | 11.49 |  |  |
Forfeited | (19,953 | ) |  | 9.99 |  |  |
Expired | — |  |  | — |  |  |
Options outstanding at December 29, 2018 | 3,754,202 |  |  | $ | 13.07 |  |  | 6.9 years
Options exercisable at December 29, 2018 | 2,162,465 |  |  | $ | 12.30 |  |  | 5.9 years
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each stock option grant under the LTIPs was estimated on the date of grant using the Black Scholes option-pricing model with the following weighted average assumptions and results for fiscal 2018, 2017 and 2016.
Weighted Average |  | 2018 | 2017 | 2016
Expected dividend yield |  | 0.0% | 0.0% | 0.0%
Risk-free interest rate |  | 2.54% | 2.00% | 1.35%
Expected term |  | 5.82 years | 5.82 years | 5.76 years
Expected volatility |  | 29.3% | 33.4% | 34.4%
Fair value of options granted |  | $6.37 | $4.34 | $3.34
Schedule of Nonvested Share Activity | A summary of the Company’s non-vested stock, restricted stock unit and performance share unit awards as of December 29, 2018, and changes during the year ended is as follows:
| Non-Vested, RSU and PSU Shares |  | Weighted Average Grant Date Fair Value
Stock awards outstanding January 2, 2016 | 1,034,191 |  |  | $ | 18.63 |
Shares granted | 602,306 |  |  | 12.11 |
Shares vested | (413,654 | ) |  | 15.11 |
Shares forfeited | (241,582 | ) |  | 20.86 |
Stock awards outstanding December 31, 2016 | 981,261 |  |  | 15.56 |
Shares granted | 104,750 |  |  | 12.27 |
Shares vested | (486,086 | ) |  | 13.98 |
Shares forfeited | (239,581 | ) |  | 20.90 |
Stock awards outstanding December 30, 2017 | 360,344 |  |  | 13.18 |
Shares granted | — |  |  | — |
Shares vested | (228,991 | ) |  | 13.11 |
Shares forfeited | (2,779 | ) |  | 12.11 |
Stock awards outstanding December 29, 2018 | 128,574 |  |  | $ | 13.32 |
Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions | The fair value of each 2018 LTIP, 2017 LTIP and 2016 LTIP PSU award under the Company's 2018 LTIP, 2017 LTIP and 2016 LTIP was estimated on the date of grant using a Monte Carlo model with the following weighted average assumptions for fiscal 2018 , fiscal 2017 and fiscal 2016, except for the illiquidity discount, which only pertains to the 2017 LTIP and 2016 LTIP PSU's with a holding period requirement.
Weighted Average |  | 2018 | 2017 | 2016
Expected dividend yield |  | 0.0% | 0.0% | 0.0%
Risk-free interest rate |  | 2.25% | 1.40% | 0.80%
Expected term |  | 2.93 years | 2.89 years | 2.62 years
Expected volatility |  | 34.4% | 32.7% | 29.3%
Illiquidity discount |  | —% | 14.0% | 16.1%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of the Company’s non-employee director restricted stock awards as of December 29, 2018, and changes during the year ended is as follows:
| Restricted stock and Restricted Stock Unit Shares |  | Weighted Average Grant Date Fair Value
Stock awards outstanding January 2, 2016 | 152,504 |  |  | $ | 12.69 |
Restricted shares granted | 43,421 |  |  | 14.51 |
Restricted shares where the restriction lapsed | (81,031 | ) |  | 11.55 |
Restricted shares forfeited | (3,535 | ) |  | 14.51 |
Stock awards outstanding December 31, 2016 | 111,359 |  |  | 14.18 |
Restricted shares granted | 60,575 |  |  | 15.63 |
Restricted shares where the restriction lapsed | (14,915 | ) |  | 12.42 |
Restricted shares forfeited | (2,210 | ) |  | 14.51 |
Stock awards outstanding December 30, 2017 | 154,809 |  |  | 14.91 |
Restricted shares granted | 61,806 |  |  | 16.92 |
Restricted shares where the restriction lapsed | (1,438 | ) |  | 13.90 |
Restricted shares forfeited | — |  |  | — |
Stock awards outstanding December 29, 2018 | 215,177 |  |  | $ | 15.49 |
Schedule of Other Share-based Compensation, Activity [Table Text Block] | A summary of the Company’s 2018, 2017 and 2016 LTIP PSU awards as of December 29, 2018, and changes during the year ended is as follows:
| LTIP PSU Shares |  | Weighted Average Grant Date Fair Value
LTIP PSU awards outstanding January 2, 2016 | — |  |  | $ | — |
Granted | 664,120 |  |  | 7.17 |
Additional PSU awards vested from performance | — |  |  | — |
Forfeited | — |  |  | — |
LTIP PSU awards outstanding December 31, 2016 | 664,120 |  |  | $ | 7.17 |
Granted | 559,388 |  |  | 11.14 |
Additional PSU awards vested from performance | — |  |  | — |
Forfeited | (82,492 | ) |  | 9.99 |
LTIP PSU awards outstanding December 30, 2017 | 1,141,016 |  |  | $ | 8.91 |
Granted | 295,514 |  |  | 20.60 |
Additional PSU awards vested from performance | 88,151 |  |  | 6.95 |
Stock issued for PSU's | (26,212 | ) |  | 6.95 |
Forfeited | (16,493 | ) |  | 9.39 |
LTIP PSU awards outstanding December 29, 2018 | 1,481,976 |  |  | $ | 11.15 |

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- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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