Debt (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 30, 2015	Aug. 01, 2014
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	$ 400,000
Current maturities	0	25,000	[1]
Long-term debt	400,000	375,000	[1]
Prior Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, gross	0	212,500
Line of credit facility, expiration date	Jul. 08, 2016
Maximum borrowing capacity	218,750
Loan acquisition costs	412
Weighted average interest rates of the Company's swapped debt (in hundredths)	3.48%
Restrictions on dividends payable	Under the Prior Credit Facility, if there was 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 was at least $100,000 (the “liquidity requirements”), the Company could 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 was less than the sum of (1) 20% of Consolidated EBITDA from continuing operations (as defined in the Prior Credit Facility) (the “20% limitation”) during the immediately preceding fiscal year and (2) provided the Company’s consolidated total leverage ratio was 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 were met, dividends could 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
2015 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, gross	400,000	0
Line of credit facility, expiration date	Jan. 08, 2020
Line of credit facility, term	5 years
Maximum borrowing capacity	750,000
Loan acquisition costs	3,537
Amount of standby letters of credit	11,530
Current borrowing capacity	338,470
Restrictions on dividends payable	Under the 2015 Revolving Credit Facility, provided there is no default existing and the total of the Company’s availability under the 2015 Revolving Credit Facility plus the Company’s cash and cash equivalents on hand is at least $100,000 (the “cash availability”), the Company may declare and pay cash dividends on shares of its common stock and repurchase shares of its common stock (1) in an unlimited amount if at the time such dividend or repurchase is made the Company’s consolidated total leverage ratio is 3.00 to 1.00 or less and (2) in an aggregate amount not to exceed $100,000 in any fiscal year if the Company’s consolidated total leverage ratio is greater than 3.00 to 1.00 at the time the dividend or repurchase is made; notwithstanding (1) and (2), so long as immediately after giving effect to the payment of any such dividends, cash availability is at least $100,000, the Company may declare and pay cash dividends on shares of its common stock in an aggregate amount not to exceed in any fiscal year the product of the aggregate amount of dividends declared in the fourth quarter of the immediately preceding fiscal year multiplied by four.
Liquidity requirements	100,000
Dividends threshold	100,000
Leverage ratio, maximum	3.00
Term Loans Payable [Member]
Debt Instrument [Line Items]
Long-term debt, gross	0	187,500
Maturity date	Jul. 08, 2016
Maximum borrowing capacity	$ 181,250

[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.