Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended				1 Months Ended
	Oct. 28, 2012	Apr. 29, 2012	Oct. 28, 2012 Senior Secured Credit Facility:	Oct. 28, 2012 Senior Secured Credit Facility: Maximum	Oct. 28, 2012 Revolving line of credit, expires March 25, 2016, interest payable at least quarterly at either LIBOR and/or prime plus a margin	Oct. 28, 2012 Variable rate term loans, mature March 25, 2017, principal and interest payments due quarterly at either LIBOR and/or prime plus a margin	Apr. 29, 2012 Variable rate term loans, mature March 25, 2017, principal and interest payments due quarterly at either LIBOR and/or prime plus a margin	Mar. 31, 2011 7.75% Senior Notes, interest payable semi-annually March 15 and September 15, net of discount	Oct. 28, 2012 7.75% Senior Notes, interest payable semi-annually March 15 and September 15, net of discount	Apr. 29, 2012 7.75% Senior Notes, interest payable semi-annually March 15 and September 15, net of discount	Oct. 28, 2012 8.875% Senior Subordinated Notes, interest payable semi-annually June 15 and December 15	Aug. 22, 2012 7% Senior Subordinated Notes, interest payable semi-annually March 1 and September 1	Apr. 29, 2012 7% Senior Subordinated Notes, interest payable semi-annually March 1 and September 1	Oct. 28, 2012 Other	Apr. 29, 2012 Other
Long-Term Debt
Interest rate (as a percent)									7.75%	7.75%	8.875%	7.00%	7.00%
Long-term debt, including current maturities	$ 1,182,471	$ 1,154,431			$ 38,000	$ 492,500	$ 495,000		$ 298,132	$ 298,026	$ 350,000		$ 357,275	$ 3,839	$ 4,130
Less current maturities	5,406	5,393
Long-term debt	1,177,065	1,149,038
Maximum borrowing capacity					300,000
Face amount of debt						500,000						357,275
Net line of credit availability limited by the maximum senior secured leverage covenant					199,000
Outstanding surety bonds and letters of credit					27,000
Commitment fee related to the unused portion (as a percent)				0.625%
Weighted average effective interest rate (as a percent)			5.11%
Debt issued								$ 300,000
Debt instrument issuance as a percentage of the face amount								99.264%