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Property (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2017 | Dec. 28, 2016 | Dec. 30, 2015
Property Owned [Abstract] |  |  |
Total property owned | $ 344,164 | $ 353,041 |
Less accumulated depreciation | 227,959 | 241,132 |
Property owned, net | 116,205 | 111,909 |
Property Held Under Capital Leases [Abstract] |  |  |
Buildings, vehicles and other equipment held under capital leases | 39,017 | 35,246 |
Less accumulated amortization | 15,366 | 14,053 |
Property held under capital leases, net | 23,651 | 21,193 |
Total property, net | 139,856 | 133,102 |
Depreciation expense, including amortization of property under capital leases | 21,200 | 20,600 | $ 20,000
Franchised Units [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | 70,438 | 76,088 |
Less accumulated depreciation | 48,225 | 52,020 |
Property owned, net | 22,213 | 24,068 |
Property Held Under Capital Leases [Abstract] |  |  |
Buildings, vehicles and other equipment held under capital leases | 6,060 | 5,656 |
Less accumulated amortization | 3,300 | 3,408 |
Property held under capital leases, net | 2,760 | 2,248 |
Total property, net | 24,973 | 26,316 |
Land [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | 32,506 | 29,914 |
Land [Member] | Franchised Units [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | 15,490 | 16,192 |
Building and leasehold improvements [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | 243,872 | 243,323 |
Building and leasehold improvements [Member] | Franchised Units [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | 54,948 | 59,896 |
Other property and equipment [Member] |  |  |
Property Owned [Abstract] |  |  |
Total property owned | $ 67,786 | $ 79,804 |

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- Definition Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 + Details
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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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