Debt Obligations - Debt & Capital Leases (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014
Debt Instrument [Line Items]
Long-term capital lease obligations	$ 6,740	$ 6,736
Long-term debt and capital lease obligations	427,670	426,458
Total debt and capital lease obligations	427,670us-gaap_DebtAndCapitalLeaseObligations	650,120us-gaap_DebtAndCapitalLeaseObligations
Notes Due 2015 [Member]
Debt Instrument [Line Items]
Interest rate on debt	5.00%
Long-term debt	0	223,662
Notes Due 2016 [Member]
Debt Instrument [Line Items]
Interest rate on debt	6.625%
Long-term debt	187,792	187,604
Option To Repurchase Headquarters Building 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 233,138	$ 232,118

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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