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Long-Term Debt (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 26, 2019	Sep. 27, 2018	Sep. 26, 2019	Sep. 27, 2018	Dec. 27, 2018	Mar. 01, 2018	Jan. 28, 2018
Derivative, Amount of Hedged Item						$ 50,000,000
Interest Expense	$ 2,807,000	$ 3,180,000	$ 8,959,000	$ 10,000,000
Revolving Credit Facility [Member]
Repayments of Notes Payable			$ 14,638,000
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate							0.96%
Interest Expense				$ 13,000
Interest Rate Swap Agreements One [Member]
Derivative, Fixed Interest Rate	2.559%		2.559%
Derivative Liability, Notional Amount	$ 25,000,000		$ 25,000,000
Interest Rate Swap Agreements One [Member] | LIBOR
Debt Instrument, Basis Spread on Variable Rate			2.125%
Interest Rate Swap Agreements Two [Member]
Derivative, Fixed Interest Rate	2.687%		2.687%
Derivative Liability, Notional Amount	$ 25,000,000		$ 25,000,000
Interest Rate Fair Value Hedge Liability at Fair Value	$ 1,441,000		$ 1,441,000		$ 205,000
Interest Rate Swap Agreements Two [Member] | LIBOR
Debt Instrument, Basis Spread on Variable Rate			2.125%

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