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Impairment, Disposition Of Property And Equipment, And Restaurant Closing Costs (Restaurant Closing Costs) (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 15, 2018 USD ($) | Sep. 30, 2018 USD ($) restaurant | Oct. 01, 2017 USD ($) | Oct. 02, 2016 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  | $ 800 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Asset Impairment Charges | [1] |  | $ 211 |  | $ 0 | $ 0
Gain (Loss) on Sale of Assets and Asset Impairment Charges |  |  | 200 |  |  |
Facility Closing [Member] |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Balance at beginning of year |  | $ 6,175 | 6,175 |  |  |
Restructuring Reserve, Accrual Adjustment | [2] |  | 675 |  |  |
Additions and adjustments |  |  | 1,639 |  |  |
Cash payments |  |  | (5,090) |  |  |
Balance at end of year |  |  | 3,534 | [3],[4] | $ 6,175 |
Restaurant Closing Costs [Member] |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Other Accrued Liabilities |  |  | $ 2,300 |  |  |
Weighted Average [Member] | Facility Closing [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
RemainingLeaseCommitmentTerm |  |  | 4 |  |  |
Interest Expense [Member] | Facility Closing [Member] |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring Reserve, Accrual Adjustment |  |  | $ 135 |  |  |
Property, Plant and Equipment [Member] |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring Costs and Asset Impairment Charges |  |  | 500 |  |  |
Commitments [Member] |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Restructuring Costs and Asset Impairment Charges |  |  | $ 500 |  |  |
Franchised Units [Member] | Impairment, Disposition, Closing Costs, and Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of Restaurants Closed | restaurant |  |  | 10 |  |  |
Entity Operated Units [Member] | Impairment, Disposition, Closing Costs, and Restructuring [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of Restaurants Closed | restaurant |  |  | 1 |  |  |
[1] | (1)In 2018, impairment charges relate to our landlord’s sale of a restaurant property to a franchisee.
[2] | (1)Adjustments relate primarily to revisions of certain sublease and cost assumptions. Our estimates related to our future lease obligations, primarily the sublease income we anticipate, are subject to a high degree of judgment and may differ from actual sublease income due to changes in economic conditions, desirability of the sites, and other factors.
[3] | (3)This balance excludes $2.3 million of restaurant closing costs that are included in accrued liabilities and other long-term liabilities, which were initially recorded as losses on the sale of company-operated restaurants to franchisees in prior years.
[4] | The weighted-average remaining lease term related to these commitments is approximately four years

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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