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EQUITY-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Equity-Based Compensation Expense Recognized
A summary of equity-based compensation expense recognized during fiscal 2020, fiscal 2019 and fiscal 2018 is as follows:
202020192018
Stock options$322 $2,626 $3,039 
Performance stock units1,309 3,035 2,449 
Restricted stock units3,929 1,844 655 
Equity-based compensation expense$5,560 $7,505 $6,143 
Total income tax benefit recognized related to equity-based compensation$204 $188 $172 
Equity-based compensation expense is allocated to General and administrative expenses and Labor and related expenses on the Consolidated Statements of Income (Loss) during fiscal 2020, fiscal 2019 and fiscal 2018 as follows:
202020192018
General and administrative expenses$5,039 $7,189 $5,991 
Labor and related expenses521 316 152 
Equity-based compensation expense$5,560 $7,505 $6,143 
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:
202020192018
Expected term (years)(1)
7.57.57.5
Expected volatility(2)
42.3 %42.2 %42.5 %
Risk-free interest rate(3)
0.7 %2.4 %2.8 %
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 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 2020 is as follows:
Stock
Options
Weighted
Average
Exercise
Price
Aggregate Intrinsic ValueWeighted Average Remaining Contractual Life (Years)
Outstanding as of December 25, 2019890,267 $21.44 
Granted6,170 35.89 
Exercised(405,688)21.20 
Forfeited(1,725)(21.00)
Outstanding as of December 30, 2020489,024 $21.83 $30,824 4.2
Options vested and exercisable as of December 30, 2020474,744 $21.25 $30,199 4.1
Options expected to vest as of December 30, 202014,280 $41.09 $625 8.2
Schedule of Information About Stock Options
The following table summarizes information about stock options outstanding and exercisable as December 30, 2020:
Options OutstandingOptions Exercisable
Number Outstanding at December 30, 2020Weighted Average Remaining Contractual Life (Years)Weighted Average Exercise PriceNumber Exercisable at December 30, 2020Weighted Average Remaining Contractual Life (Years)Weighted Average Exercise Price
Exercise Price
$21.00466,225 4.1$21.00 466,225 4.1$21.00 
$34.627,411 5.4$34.62 7,411 5.4$34.62 
$36.411,108 5.9$36.41 1,108 5.9$36.41 
$38.912,060 6.4$38.91 — — $— 
$39.913,022 7.2$39.91 — — $— 
$54.363,028 8.2$54.36 — — $— 
$35.896,170 9.2$35.89 — — $— 
Schedule of Stock Options Outstanding and Exercisable, Option Plans
A summary of unvested performance stock unit activity for fiscal year 2020, is as follows:
Performance
Stock
Units
Weighted
Average
Grant Date Fair Value
Outstanding as of December 25, 2019117,517 $51.97 
Granted79,388 57.20 
Performance achievement(1)
7,792 52.47 
Vested(50,242)49.34 
Forfeited(17,234)54.45 
Outstanding as of December 30, 2020137,221 $55.67 
(1)    Represents the incremental awards earned and/or awards forfeited based on the achievement of performance conditions
Summary of Restricted Stock Unit Activity
A summary of unvested restricted stock unit activity for fiscal year 2020 is as follows:
Restricted
Stock
Units
Weighted
Average
Grant Date Fair Value
Outstanding as of December 25, 2019152,098 $49.87 
Granted170,528 57.41 
Vested(41,974)50.66 
Forfeited(22,159)54.46 
Outstanding as of December 30, 2020258,493 $54.33