Stock-Based Employee Compensation (Tables)

12 Months Ended

Dec. 30, 2014

Stock-Based Employee Compensation [Abstract]

Stock Option Compensation Cost

	Fiscal Year Ended
	December 25,		December 31,		December 30,
	2012		2013		2014
Restaurant operating expenses	$	74	$	332	$	442
General and administrative costs		304		1,357		2,125
Total stock compensation cost	$	378	$	1,689	$	2,567

Summary Of Stock Option Activity

	December 30, 2014
	Shares	Weighted average exercise price		Weighted average Remaining Contractual Term	Aggregate Intrinsic Value ($000's)
Outstanding at beginning of year	1,492,775	$	17.01
Granted	82,375		22.65
Exercised	(85,400)		13.93
Forfeited	(60,750)		18.76
Outstanding at end of period	1,429,000	$	17.45	8.17 years	$	8,640
Options exercisable at end of period	454,750	$	16.12	7.97 years	$	3,335

Summary Of Non-Vested Shares

	December 30, 2014
	Shares		Weighted average Grant-Date Fair Value
Non-vested shares at beginning of year	1,326,375	$	6.84
Granted	82,375		8.85
Vested	(375,000)		6.61
Forfeited	(59,500)		7.41
Non-vested shares at end of period	974,250	$	7.08

Schedule Of Stock Option Valuation Assumptions

	2012	2013	2014
Weighted average grant date fair value	$4.82	$8.30	$8.85
Weighted average risk-free interest rate	0.58%	1.44%	1.91%
Weighted average expected life	5.40 years	5.49 years	5.91 years
Weighted average volatility	40.21%	41.65%	38.00%
Expected dividend	—	—	—