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Long-Term Debt and Short-Term Borrowings (Details) - USD ($)
$ in Thousands
Sep. 24, 2020
Dec. 26, 2019
Long-Term Debt and Short-Term Borrowings    
Mortgage notes $ 24,482 $ 24,571
Senior notes 100,000 109,000
Unsecured term note due February 2025, with monthly principal and interest payments of $39,110, bearing interest at 5.75% 1,827 2,093
Convertible senior notes 76,655 0
Payroll Protection Program loans 3,147 0
Revolving credit agreement 10,000 81,000
Debt issuance costs (3,827) (322)
Long-term Debt, Total 212,284 216,342
Less current maturities, net of issuance costs 12,927 9,910
Long-term Debt, Excluding Current Maturities, Total $ 199,357 $ 206,432