Long-Term Debt and Short-Term Borrowings - Summary for Debt (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2022	Dec. 30, 2021
Debt Disclosure [Abstract]
Principal and interest payments	$ 39
Interest rate of unsecured term note	5.75%
Mortgage notes	$ 24,203	$ 24,388
Senior notes	90,000	90,000
Unsecured term note due February 2025, with monthly principal and interest payments of $39, bearing interest at 5.75%	1,158	1,356
Convertible senior notes	100,050	100,050
Payroll Protection Program loans	2,712	3,181
Revolving credit agreement	0	0
Debt issuance costs	(3,326)	(3,831)
Total debt, net of debt issuance costs	214,797	215,144
Less current maturities, net of issuance costs	11,077	10,967
Long-term debt	203,720	204,177
Short-term borrowings	46,628	47,346
Total debt and short-term borrowings, net of issuance costs	$ 261,425	$ 262,490

Amount of short-term and long-term borrowings.

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The interest rate of unsecured term note.

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Carrying amount of loans granted under Payroll Protection Program under the CARES Act, with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion.

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Carrying value as of the balance sheet date of unsecured notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Amount of the required periodic payments including both interest and principal payments.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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