Senior Notes and Other Long Term Debt (Details) (USD $) In Thousands	Sep. 30, 2011	Apr. 01, 2011	Oct. 31, 2009	Oct. 22, 2009
Senior Notes due 2016 (the Notes)
Notes	$ 275,000	$ 275,000	$ 275,000	$ 275,000
Unamortized discount on the Notes	(2,456)	(2,704)	(3,400)
Total Notes, net of discount	272,544	272,296
Less: current portion of the Notes	0	0
Total notes long term, net	272,544	272,296
Other Long-Term Debt
Line of credit	170,000	60,000
Capital lease obligations	2,613	3,074
Total other long-term debt	172,613	63,074
Less: current portion of other long-term debt	1,212	1,128
Other long-term debt, net	171,401	61,946
Total debt	445,157	335,370
Less: current portion	1,212	1,128
Long-term debt, net	$ 443,945	$ 334,242