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Stockholders' Equity and Stock-Based Compensation (Tables) | 12 Months Ended
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Jan. 02, 2021
Stockholders' Equity and Stock-Based Compensation [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of all stock option activity as of January 2, 2021 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 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
Granted | 610,953 |  |  | 21.00 |  |  |
Exercised | (380,206) |  |  | 9.83 |  |  |
Forfeited | (6,464) |  |  | 18.11 |  |  |
Expired | — |  |  | — |  |  |
Options outstanding at December 28, 2019 | 3,978,485 |  |  | 14.59 |  |  | 6.5 years
Granted | 550,941 |  |  | 28.89 |  |  |
Exercised | (837,911) |  |  | 12.01 |  |  |
Forfeited | — |  |  | — |  |  |
Expired | — |  |  | — |  |  |
Options outstanding at January 2, 2021 | 3,691,515 |  |  | $ | 17.31 |  |  | 6.2 years
Options exercisable at January 2, 2021 | 2,527,003 |  |  | $ | 14.07 |  |  | 5.3 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 2020, 2019 and 2018.
Weighted Average |  | 2020 | 2019 | 2018
Expected dividend yield |  | 0.0% | 0.0% | 0.0%
Risk-free interest rate |  | 1.65% | 2.61% | 2.54%
Expected term |  | 5.94 years | 6.00 years | 5.82 years
Expected volatility |  | 27.4% | 29.6% | 29.3%
Fair value of options granted |  | $8.64 | $7.16 | $6.37
Schedule of Nonvested Share Activity | A summary of the Company’s non-vested stock, restricted stock unit and performance share unit awards as of January 2, 2021, and changes during the year ended is as follows:
| Non-Vested, RSU and PSU Shares |  | Weighted Average Grant Date Fair Value
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 |
Shares granted | — |  |  | — |
Shares vested | (126,511) |  |  | 12.13 |
Shares forfeited | (1,313) |  |  | 14.92 |
Stock awards outstanding December 28, 2019 | 750 |  |  | 15.50 |
Shares granted | 11,000 |  |  | 35.66 |
Shares vested | (375) |  |  | 15.50 |
Shares forfeited | — |  |  | — |
Stock awards outstanding January 2, 2021 | 11,375 |  |  | $ | 35.00 |
Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions | The fair value of each 2020 LTIP, 2019 LTIP and 2018 LTIP PSU award under the Company's 2020 LTIP, 2019 LTIP and 2018 LTIP was estimated on the date of grant using a Monte Carlo model with the following weighted average assumptions for fiscal 2020, fiscal 2019 and fiscal 2018.
Weighted Average |  | 2020 | 2019 | 2018
Expected dividend yield |  | 0.0% | 0.0% | 0.0%
Risk-free interest rate |  | 1.55% | 2.58% | 2.25%
Expected term |  | 2.99 years | 2.93 years | 2.93 years
Expected volatility |  | 25.8% | 30.7% | 34.4%
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 January 2, 2021, 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 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 |
Restricted shares granted | 52,990 |  |  | 20.76 |
Restricted shares where the restriction lapsed | (6,803) |  |  | 2.94 |
Restricted shares forfeited | — |  |  | — |
Stock awards outstanding December 28, 2019 | 261,364 |  |  | 16.89 |
Restricted shares granted | 48,267 |  |  | 20.51 |
Restricted shares where the restriction lapsed | (73,354) |  |  | 16.33 |
Restricted shares forfeited | — |  |  | — |
Stock awards outstanding January 2, 2021 | 236,277 |  |  | $ | 17.79 |
Share-based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] | A summary of the Company’s 2020, 2019 and 2018 LTIP PSU awards as of January 2, 2021, and changes during the year ended is as follows:
| LTIP PSU Shares |  | Weighted Average Grant Date Fair Value
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 PSUs | (26,212) |  |  | 6.95 |
Forfeited | (16,493) |  |  | 9.39 |
LTIP PSU awards outstanding December 29, 2018 | 1,481,976 |  |  | $ | 11.15 |
Granted | 305,195 |  |  | 21.50 |
Additional PSU awards vested from performance | 235,126 |  |  | 7.23 |
Stock issued for PSUs | (125,067) |  |  | 7.84 |
Forfeited | (3,757) |  |  | 19.09 |
LTIP PSU awards outstanding December 28, 2019 | 1,893,473 |  |  | $ | 12.54 |
Granted | 224,481 |  |  | 31.80 |
Additional PSU awards vested from performance | 434,666 |  |  | 11.14 |
Stock issued for PSUs | (349,210) |  |  | 8.91 |
Forfeited | (332) |  |  | 26.88 |
LTIP PSU awards outstanding January 2, 2021 | 2,203,078 |  |  | $ | 14.80 |

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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=120381028&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=120381028&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=120381028&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=120381028&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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