Stock-Based Awards (Tables)

12 Months Ended

Jul. 30, 2016

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following table summarizes the valuation of stock options and restricted share units granted during fiscal 2016, 2015, and 2014 and the significant valuation assumptions:

	Fiscal Year Ended
	2016			2015			2014
Weighted average fair value of RSUs granted	$	72.41		$	31.42		$	27.54
Weighted average fair value of Performance RSUs granted	$	77.86		$	31.03		$	27.66
Weighted average fair value of stock options granted	$	78.20		$	19.48		$	17.43
Stock option assumptions:
Risk-free interest rate	2.0		%	2.1		%	2.7		%
Expected life (in years)	7.3			8.8			8.8
Expected volatility	55.0		%	54.5		%	55.1		%
Expected dividends	—			—			—

Schedule of Stock-based Compensation Expense and Related Tax Benefit Recognized

Stock-based compensation expense and the related tax benefit recognized and realized related to stock options and restricted share units during fiscal 2016, 2015, and 2014 were as follows (dollars in thousands):

	Fiscal Year Ended
	2016		2015		2014
Stock-based compensation	$	16,850	$	13,923	$	12,596
Tax benefit recognized in the statement of operations	$	6,436	$	5,458	$	4,819
Cash tax benefit realized from option exercises and stock vestings	$	18,097	$	13,976	$	7,116

Schedule of Share-based Compensation, Stock Options Award Activity

The following table summarizes stock option award activity during fiscal 2016:

	Stock Options
	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding as of July 25, 2015	915,323		$	16.86
Granted	35,863		$	78.20
Options exercised	(212,619	)	$	12.91
Canceled	(1,300	)	$	13.88
Outstanding as of July 30, 2016	737,267		$	20.99	5.5	$	53,862
Exercisable options as of July 30, 2016	553,495		$	15.63	4.7	$	43,405

Schedule of Share-based Compensation, RSU and Performance RSU Activity

The following table summarizes RSU and Performance RSU award activity during fiscal 2016:

	Restricted Stock
	RSUs						Performance RSUs
	Share Units		Weighted Average Grant Price		Aggregate Intrinsic Value (In thousands)		Share Units		Weighted Average Grant Price		Aggregate Intrinsic Value (In thousands)
Outstanding as of July 25, 2015	322,008		$	24.46			945,540		$	26.46
Granted	92,429		$	72.41			238,209		$	77.86
Share units vested	(139,921	)	$	23.67			(361,998	)	$	25.28
Forfeited or canceled	(23,252	)	$	24.28			(195,780	)	$	23.40
Outstanding as of July 30, 2016	251,264		$	42.56	$	23,631	625,971		$	47.66	$	58,873