Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jan. 01, 2012	Mar. 31, 2011
Long-Term Debt
Principal amount of long-term debt	$ 1,324,453	$ 1,639,453
Less: Unamortized discounts	19,093	29,744
Carrying amount of long-term debt	1,305,360	1,609,709
Less: current portion	25,000	320,000
Carrying amount of long-term debt, excluding current portion	1,280,360	1,289,709
Term A Loan due 2015
Long-Term Debt
Principal amount of long-term debt	375,000	390,000
2.75% Convertible Senior Subordinated Notes due 2011
Long-Term Debt
Debt instrument interest rate stated percentage	2.75%	2.75%
Principal amount of long-term debt		300,000
Less: Unamortized discounts		5,875
Carrying amount of long-term debt		294,125
6.75% Senior Subordinated Notes due 2016
Long-Term Debt
Debt instrument interest rate stated percentage	6.75%	6.75%
Principal amount of long-term debt	400,000	400,000
6.875% Senior Subordinated Notes due 2020
Long-Term Debt
Debt instrument interest rate stated percentage	6.875%	6.875%
Principal amount of long-term debt	350,000	350,000
3.00% Convertible Senior Subordinated Notes due 2024
Long-Term Debt
Debt instrument interest rate stated percentage	3.00%	3.00%
Principal amount of long-term debt	199,453	199,453
Less: Unamortized discounts	19,093	23,869
Carrying amount of long-term debt	$ 180,360	$ 175,584

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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Interest rate stated in the contractual debt agreement.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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