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Property (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2016	Dec. 30, 2015	Dec. 31, 2014
Property Owned [Abstract]
Total property owned	$ 353,041	$ 345,382
Less accumulated depreciation	241,132	235,967
Property owned, net	111,909	109,415
Property Held Under Capital Leases [Abstract]
Buildings, vehicles, and other equipment held under capital leases	35,246	27,429
Less accumulated amortization	14,053	12,028
Property held under capital leases, net	21,193	15,401
Total property, net	133,102	124,816
Depreciation expense, including amortization of property under capital leases	20,600	20,000	$ 19,200
Franchised Units [Member]
Property Owned [Abstract]
Total property owned	76,088	77,743
Less accumulated depreciation	52,020	52,872
Property owned, net	24,068	24,871
Property Held Under Capital Leases [Abstract]
Buildings, vehicles, and other equipment held under capital leases	5,656	4,573
Less accumulated amortization	3,408	3,003
Property held under capital leases, net	2,248	1,570
Total property, net	26,316	26,441
Land [Member]
Property Owned [Abstract]
Total property owned	29,914	29,856
Land [Member] | Franchised Units [Member]
Property Owned [Abstract]
Total property owned	16,192	16,192
Building and leasehold improvements [Member]
Property Owned [Abstract]
Total property owned	243,323	238,134
Building and leasehold improvements [Member] | Franchised Units [Member]
Property Owned [Abstract]
Total property owned	59,896	61,551
Other property and equipment [Member]
Property Owned [Abstract]
Total property owned	$ 79,804	$ 77,392

X

- Definition

Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets).

+ References

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-Publisher FASB
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-Section 50
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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Gross amount of long-lived physical assets excluding assets held under lease agreements used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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