Debt Obligations - Debt & Capital Leases (Details) - USD ($) $ in Thousands	Sep. 25, 2016	Dec. 27, 2015
Debt Instrument [Line Items]
Long-term capital lease obligations	$ 6,774	$ 6,756
Total debt and capital lease obligations	434,915	431,228
Current portion of long-term debt and capital lease obligations	188,993	188,377
Total long-term debt and capital lease obligations	245,922	242,851
Notes Due 2016
Debt Instrument [Line Items]
Principal amount	189,170	189,170
Less unamortized discount based on imputed interest rate	$ 177	793
Interest rate on debt	6.625%
Long-term debt	$ 188,993	188,377
Option To Repurchase Headquarters Building 2019
Debt Instrument [Line Items]
Principal amount	250,000	250,000
Less unamortized discount based on imputed interest rate	10,852	13,905
Total option to repurchase ownership interest in headquarters building in 2019	$ 239,148	$ 236,095
Interest rate on debt	13.00%

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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