Long-Term Debt (Details 3) (USD $)	9 Months Ended				9 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Mar. 31, 2011	Mar. 31, 2011 Convertible Senior Subordinated Notes	Jan. 01, 2012 3.00% Convertible Senior Subordinated Notes due 2024 M	Mar. 31, 2011 3.00% Convertible Senior Subordinated Notes due 2024 M	Mar. 31, 2009 3.00% Convertible Senior Subordinated Notes due 2024	Mar. 31, 2005 3.00% Convertible Senior Subordinated Notes due 2024	Oct. 02, 2011 2.75% Convertible Senior Subordinated Notes due 2011	Mar. 31, 2011 2.75% Convertible Senior Subordinated Notes due 2011 M	Mar. 31, 2007 2.75% Convertible Senior Subordinated Notes due 2011
Long-Term Debt
Face amount								$ 200,000,000			$ 300,000,000
Percentage of principal amount at which the entity may redeem some or all of the notes on or after August 20, 2014					100.00%
Percentage of principal amount plus accrued and unpaid interest at which holders may require the entity to repurchase the debt instrument on August 15, 2014 and August 15, 2019					100.00%
The number of shares per $1000 principal into which the debt can be converted					12.7013				10.4208
Conversion ratio denominator, principal amount of Notes					1				1
Conversion price (in dollars per share)					$ 78.73				$ 95.96
Amount of notes converted							547,000
Total debt (current portion of debt and long-term debt) to total capitalization (total debt and stockholders' equity) (as a percent)	0.50		0.58
Cash paid for interest, total	39,211,000	30,467,000
Additional information about convertible notes
Carrying amount of the equity component				107,628,000	56,849,000	56,849,000				50,779,000
Principal amount of long-term debt	1,324,453,000		1,639,453,000	499,453,000	199,453,000	199,453,000				300,000,000
Unamortized discount of liability component	19,093,000		29,744,000	29,744,000	19,093,000	23,869,000				5,875,000
Net carrying amount of liability component	1,305,360,000		1,609,709,000	469,709,000	180,360,000	175,584,000				294,125,000
Remaining amortization period of discount (in months)					152	161				6
Effective interest rate on liability component (as a percent)					7.00%	7.00%				6.80%
Closing stock price (in dollars per share)	$ 57.16
Percentage of ownership in guarantor subsidiaries	100.00%
Minimum payments on outstanding long-term debt
Remainder of fiscal 2012	5,000,000
Fiscal 2013	30,000,000
Fiscal 2014	40,000,000
Fiscal 2015	239,453,000
Fiscal 2016	260,000,000
Thereafter	750,000,000
Total payments	$ 1,324,453,000		$ 1,639,453,000	$ 499,453,000	$ 199,453,000	$ 199,453,000				$ 300,000,000