The interest rate of unsecured term note.

No definition available.

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- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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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.

+ References

No definition available.

+ Details

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

Nominal or face amount used to calculate payment on derivative.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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- Definition

Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Period Type:	duration

- Definition

Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions 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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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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Balance Type:	credit
Period Type:	instant

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

+ Details

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

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- Details

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- Details

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- Details

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Long-Term Debt - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 26, 2019	Dec. 27, 2018	Dec. 28, 2017	Mar. 01, 2018	Jan. 31, 2018
Debt Instrument [Line Items]
Interest Rate of Unsecured Term Note	5.75%	5.75%
Principal and interest payments	$ 39,110,000	$ 39,110,000
Senior Notes	109,000,000	118,000,000
Line of Credit Facility, Remaining Borrowing Capacity	139,000,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	10,281,000	11,434,000	$ 10,338,000
Derivative, Amount of Hedged Item				$ 50,000,000
Interest Expense	11,791,000	$ 13,079,000	$ 12,100,000
Senior Notes [Member]
Debt Instrument [Line Items]
Senior Notes	$ 109,000,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time	4.37%	4.53%
Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.15%
Minimum [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	4.02%
Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.25%
Maximum [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	6.55%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 81,000,000
Debt Instrument, Interest Rate, Effective Percentage	2.70%	3.46%
Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 225,000,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate					0.96%
Derivative, Notional Amount					$ 25,000,000
Interest Expense		$ 13,000
Interest Rate Swap [Member] \| LIBOR
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate	1.75%
Interest Rate Swap Agreements One [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate	2.559%
Derivative, Notional Amount	$ 25,000,000
Interest Rate Swap Agreements Two [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate	2.687%
Derivative, Notional Amount	$ 25,000,000
Interest Rate Fair Value Hedge Liability at Fair Value	$ 1,194,000	$ 205,000
Mortgage Notes [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.27%	4.66%
Mortgage Notes [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest Rate of Unsecured Term Note	3.00%
Mortgage Notes [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest Rate of Unsecured Term Note	5.03%