Debt Obligations - Debt & Capital Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 30, 2018	Jul. 01, 2018
Debt Instrument [Line Items]
Capital Lease Obligations, Current	$ 6,893	$ 6,832
Total short-term debt and finance lease obligations	254,378	253,630
Change In Repurchase Price	4,700
Option To Repurchase Headquarters Building 2019
Debt Instrument [Line Items]
Principal amount	245,339	250,000
Less unamortized (premium)/discount based on imputed interest rate of 12.0% in 2019 and 13.0% in 2018	(2,146)	3,202
Net option to repurchase ownership interest in headquarters building in 2019	$ 247,485	$ 246,798
Imputed interest rate (as a percent)	12.00%		13.00%

Debt Instrument, Noncash Reduction to Principal Amount

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- Definition

Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Amount of long-term debt and lease obligation, including portion classified as current.

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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