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EQUITY-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 28, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Nonvested Share Activity [Table Text Block] | A summary of unvested stock option activity for fiscal 2015 and 2016 is as follows:
|  | Stock Options |  |  | Weighted Average Grant-Date Fair Value |
Unvested as of December 31, 2014 | — |  |  | $ | — |
| Vested | — |  |  | — |
| Granted | 2,622,281 |  |  | 8.53 |
| Forfeited | (47,300 | ) |  | 8.59 |
Unvested as of December 30, 2015 | 2,574,981 |  |  | $ | 8.53 |
| Vested | (562,296 | ) |  | 8.32 |
| Granted | 16,931 |  |  | 16.32 |
| Forfeited | (65,365 | ) |  | 8.59 |
Unvested as of December 28, 2016 | 1,964,251 |  |  | $ | 8.66 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] | The following table summarizes information about stock options outstanding and exercisable as December 28, 2016:
|  | Options Outstanding |  |  | Options Exercisable |
|  | Number Outstanding at December 28, 2016 |  |  | Weighted Average Remaining Contractual Life (Years) |  | Weighted Average Exercise Price |  |  | Number Exercisable at December 28, 2016 |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Weighted Average Exercise Price |
Exercise Price |  |  |  |  |  |
$21.00 |  | 2,347,791 |  |  | 8.1 |  | $ | 21.00 |  |  | 400,471 |  |  | 8.1 |  |  | $ | 21.00 |
$34.62 |  | 15,823 |  |  | 9.4 |  | $ | 34.62 |  |  | — |  |  | — |  |  | $ | — |
$36.41 |  | 1,108 |  |  | 9.9 |  | $ | 36.41 |  |  | — |  |  | — |  |  | $ | — |
Schedule of equity-based compensation expense recognized | A summary of equity-based compensation expense recognized during fiscal 2016, 2015 and 2014 is as follows:
|  | 2016 |  |  | 2015 |  |  | 2014 |
Unit appreciation rights | $ | — |  |  | $ | 11,762 |  |  | $ | — |
Restricted Class B units | — |  |  | 605 |  |  | 165 |
Stock options | 4,262 |  |  | 4,314 |  |  | — |
Performance stock units | 1,092 |  |  | — |  |  | — |
Equity-based compensation expense | $ | 5,354 |  |  | $ | 16,681 |  |  | $ | 165 |
Total income tax benefit recognized related to equity-based compensation | $ | 168 |  |  | $ | 482 |  |  | $ | 4 |
Schedule of unit appreciation rights activity | .
Schedule of restricted class B activity | .
Schedule of fair value of stock options | The fair value of stock option awards was determined on the grant date using the Black-Scholes valuation model based on the following weighted-average assumptions:
| 2016 |  |  | 2015 |
Expected term (years)(1) | 5.5 |  |  | 7.5 |
Expected volatility(2) | 50.7 | % |  | 35.1 | %
Risk-free interest rate(3) | 1.5 | % |  | 1.6 | %
Dividend yield(4) | — | % |  | — | %
(1) | Expected term represents the estimated period of time until an award is exercised and was determined using the simplified method.
(2) | Expected volatility is based on the historical volatility of a selected peer group over a period equivalent to the expected term.
(3) | The risk-free rate rate is an interpolation of yields on U.S. Treasury securities with maturities equivalent to the expected term.
(4) | We have assumed a dividend yield of zero as we have no plans to declare dividends in the foreseeable future.
Schedule of stock options, activity | A summary of stock option activity for fiscal years 2015 and 2016 is as follows:
|  | Stock Options |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contractual Life (Years)
Outstanding as of December 31, 2014 | — |  |  | $ | — |  |  |  |  |
| Granted | 2,622,281 |  |  | 21.00 |  |  |  |  |
| Exercised | — |  |  | — |  |  |  |  |
| Forfeited | (47,300 | ) |  | (21.00 | ) |  |  |  |
| Expired | — |  |  | — |  |  |  |  |
Outstanding as of December 30, 2015 | 2,574,981 |  |  | $ | 21.00 |  |  |  |  |
| Granted | 16,931 |  |  | 34.74 |  |  |  |  |
| Exercised | (160,230 | ) |  | 21.00 |  |  |  |  |
| Forfeited | (66,960 | ) |  | (21.00 | ) |  |  |  |
| Expired | — |  |  | — |  |  |  |  |
Outstanding as of December 28, 2016 | 2,364,722 |  |  | $ | 21.10 |  |  | $ | 37,201 |  |  | 8.1
Options vested and exercisable as of December 28, 2016 | 400,471 |  |  | $ | 21.00 |  |  | $ | 6,339 |  |  | 8.1
Options expected to vest as of December 28, 2016 | 1,847,242 |  |  | $ | 21.13 |  |  | $ | 29,009 |  |  | 8.1
Schedule of stock options outstanding and exercisable option plans | The following table summarizes information about stock options outstanding and exercisable as December 28, 2016:
|  | Options Outstanding |  |  | Options Exercisable |
|  | Number Outstanding at December 28, 2016 |  |  | Weighted Average Remaining Contractual Life (Years) |  | Weighted Average Exercise Price |  |  | Number Exercisable at December 28, 2016 |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Weighted Average Exercise Price |
Exercise Price |  |  |  |  |  |
$21.00 |  | 2,347,791 |  |  | 8.1 |  | $ | 21.00 |  |  | 400,471 |  |  | 8.1 |  |  | $ | 21.00 |
$34.62 |  | 15,823 |  |  | 9.4 |  | $ | 34.62 |  |  | — |  |  | — |  |  | $ | — |
$36.41 |  | 1,108 |  |  | 9.9 |  | $ | 36.41 |  |  | — |  |  | — |  |  | $ | — |
Performance Stock Units Under the 2015 Plan, we may grant performance stock units and other types of performance-based equity awards that vest based on the outcome of certain performance criteria that are established and approved by the Compensation Committee of the Board of Directors. The actual number of equity awards earned is based on the level of performance achieved over a predetermined performance period, relative to established financial goals, none of which are considered market conditions. For performance stock units granted during fiscal 2016, the amount of awards that can be earned range from 0% to 125% of the number of performance stock units granted, based on the achievement of approved financial goals over a one-year performance period. In addition to the performance conditions, performance stock units are also subject to a requisite service period and the awards will vest ratably over three years. The fair value of performance stock units is determined based on the closing market price of our Class A common stock on the date of grant. Compensation expense related to the performance stock units is recognized using a graded-vesting attribution method over the vesting period based on the most probable outcome of the performance conditions. A summary of performance stock unit activity for fiscal 2016 is as follows:
|  | Performance Stock Units |  |  | Weighted Average Grant Date Fair Value |
Outstanding at beginning of period | — |  |  | $ | — |
| Granted | 63,600 |  |  | 38.41 |
| Vested | — |  |  | — |
| Forfeited | (2,000 | ) |  | 38.43 |
| Expired | — |  |  | — |
Outstanding at end of period | 61,600 |  |  | $ | 38.41 |

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