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Stock-Based Awards (Tables)

12 Months Ended

Jul. 29, 2017

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

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

Stock-based compensation expense and the related tax benefit recognized and realized during fiscal 2017, 2016, and 2015 were as follows (dollars in thousands):

	Fiscal Year Ended
	2017				2016				2015
Stock-based compensation	$	20,805			$	16,850			$	13,923
Related tax benefit for stock-based compensation	$	7,996			$	6,436			$	5,458
Cash tax benefit realized from option exercises and stock vestings	$	14,487			$	18,097			$	13,976

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 2017, 2016, and 2015 and the significant valuation assumptions:

	Fiscal Year Ended
	2017				2016				2015
Weighted average fair value of RSUs granted	$	79.04			$	72.41			$	31.42
Weighted average fair value of Performance RSUs granted	$	79.29			$	77.86			$	31.03
Weighted average fair value of stock options granted	$	78.46			$	78.20			$	19.48
Stock option assumptions:
Risk-free interest rate	2.3		%		2.0		%		2.1		%
Expected life (in years)	7.6				7.3				8.8
Expected volatility	44.7		%		55.0		%		54.5		%
Expected dividends	—				—				—

Schedule of Share-based Compensation, Stock Options Award Activity

The following table summarizes stock option award activity during fiscal 2017:

	Stock Options
	Shares			Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (In years)		Aggregate Intrinsic Value (In thousands)
Outstanding as of July 30, 2016	737,267			$	20.99
Granted	36,914			$	78.46
Options exercised	(102,831	)		$	14.09
Canceled	(1,000	)		$	6.83
Outstanding as of July 29, 2017	670,350			$	25.24			4.9		$	43,614
Exercisable options as of July 29, 2017	539,378			$	18.34			4.2		$	38,812

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

The following table summarizes RSU and Performance RSU award activity during fiscal 2017:

	Restricted Stock
	RSUs							Performance RSUs
	Share Units			Weighted Average Grant Price				Share Units			Weighted Average Grant Price
Outstanding as of July 30, 2016	251,264			$	42.56			625,971			$	47.66
Granted	66,382			$	79.04			274,282			$	79.29
Share units vested	(126,186	)		$	34.65			(287,593	)		$	40.53
Forfeited or canceled	(3,995	)		$	46.87			(58,778	)		$	43.52
Outstanding as of July 29, 2017	187,465			$	60.71			553,882			$	67.46

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- Definition

Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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