Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Aug. 01, 2014
Debt Instrument [Line Items]
Long-term debt, gross	$ 393,750	$ 400,000
Current maturities	25,000	25,000	[1]
Long-term debt	368,750	375,000	[1]
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, gross	212,500	212,500
Line of credit facility, expiration date	Jul. 08, 2016
Maximum borrowing capacity	500,000
Amount of standby letters of credit	20,152
Current borrowing capacity	267,348
Term Loans Payable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	181,250	187,500
Maturity date	Jul. 08, 2016
Maximum borrowing capacity	250,000
Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	750,000
Weighted average interest rates of the Company's swapped debt (in hundredths)	3.73%
Restrictions on dividends payable	The Credit Facility also imposes restrictions on the amount of dividends the Company is permitted to pay and the amount of shares the Company is permitted to repurchase. Provided there is no default existing and the total of the Company's availability under the Revolving Credit Facility plus the Company's cash and cash equivalents on hand is at least $100,000 (the "liquidity requirements"), the Company may declare and pay cash dividends on shares of its common stock and repurchase shares of its common stock if the aggregate amount of dividends paid and shares repurchased in any fiscal year is less than the sum of (1) 20% of Consolidated EBITDA from continuing operations (as defined in the Credit Facility) (the "20% limitation") during the immediately preceding fiscal year and (2) provided the Company's consolidated total leverage ratio is 3.25 to 1.00 or less, $100,000 (less the amount of any share repurchases during the current fiscal year). In any event, as long as the liquidity requirements are met, dividends may be declared and paid in any fiscal year up to the amount of dividends permitted and paid in the preceding fiscal year without regard to the 20% limitation.
Liquidity requirements	100,000
Dividend limitation (in hundredths)	20.00%
Dividends threshold	$ 100,000
Leverage ratio, maximum	3.25

[1] This Condensed Consolidated Balance Sheet has been derived from the audited Consolidated Balance Sheet as of August 1, 2014, as filed with the Securities and Exchange Commission in the Company's Annual Report on Form 10-K for the fiscal year ended August 1, 2014.