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EQUITY-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 26, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Equity-Based Compensation Expense Recognized

A summary of equity-based compensation expense recognized during fiscal 2018, 2017 and 2016 is as follows:

		2018				2017				2016
Stock options		3,039				3,474				4,262
Performance stock units		2,449				1,869				1,092
Restricted stock units		655				280				—
Equity-based compensation expense		$	6,143			$	5,623			$	5,354
Total income tax benefit recognized related to equity-based compensation		$	172			$	198			$	168

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 2018, 2017 and 2016 as follows:

		2018			2017			2016
General and administrative expenses		5,991			5,463			5,260
Labor and related expenses		152			160			94
Equity-based compensation expense		6,143			5,623			5,354

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:

	2018			2017			2016
Expected term (years)(1)	7.5			7.5			5.5
Expected volatility(2)	42.5	%		44.5	%		50.7	%
Risk-free interest rate(3)	2.8	%		2.1	%		1.5	%
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 2018, 2017 and 2016 is as follows:

		Stock Options			Weighted Average Exercise Price				Aggregate Intrinsic Value				Weighted Average Remaining Contractual Life (Years)
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
	Granted	5,150			38.91
	Exercised	(359,011	)		21.13
	Forfeited	(291,520	)		(21.00		)
	Expired	—			—
Outstanding as of December 27, 2017		1,719,341			$	21.16
	Granted	5,036			39.91
	Exercised	(260,515	)		21.00
	Forfeited	(102,879	)		(21.27		)
	Expired	—			—
Outstanding as of December 26, 2018		1,360,983			$	21.25			$	29,881			6.1
Options vested and exercisable as of December 26, 2018		674,247			$	21.26			$	14,798			6.1
Options expected to vest as of December 26, 2018		686,736			$	21.25			$	15,083			6.1

Schedule of Nonvested Share Activity

As of December 26, 2018, total unrecognized compensation expense related to unvested stock options was $3,335

Schedule of Information About Stock Options

The following table summarizes information about stock options outstanding and exercisable as December 26, 2018:

		Options Outstanding									Options Exercisable
		Number Outstanding at December 26, 2018			Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price				Number Exercisable at December 26, 2018			Weighted Average Remaining Contractual Life (Years)			Weighted Average Exercise Price
Exercise Price
$21.00		1,339,274			6.1		$	21.00			661,694			6.1			$	21.00
$34.62		10,415			7.4		$	34.62			10,415			7.4			$	34.62
$36.41		1,108			7.9		$	36.41			1,108			7.9			$	36.41
$38.91		5,150			8.5		$	38.91			1,030			8.5			$	38.91
$39.91		5,036			9.2		$	39.91			—			—			$	—

Schedule of Stock Options Outstanding and Exercisable, Option Plans

A summary of performance stock unit activity for fiscal years 2018, 2017 and 2016 is as follows:

		Performance Stock Units			Weighted Average Grant Date Fair Value
Outstanding as of December 30, 2015		—			$	—
	Granted	63,600			38.41
	Performance achievement(1)	—			—
	Vested	—			—
	Forfeited	(2,000	)		38.43
	Expired	—			—
Outstanding as of December 28, 2016		61,600			$	38.41
	Granted	87,596			37.90
	Performance achievement(1)	9,545			38.40
	Vested	(22,703	)		38.40
	Forfeited	(11,196	)		38.28
	Expired	—			—
Outstanding as of December 27, 2017		124,842			$	38.06
	Granted	60,437			58.46
	Performance achievement(1)	(12,139	)		37.89
	Vested	(43,861	)		38.13
	Forfeited	(10,737	)		41.28
	Expired	—			—
Outstanding as of December 26, 2018		118,542			$	48.16

(1) Represents the incremental awards earned and/or awards forfeited based on the achievement of performance conditions

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