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Impairment and other charges, net Cost of closed restaurants (Details) - USD ($) $ in Thousands | 4 Months Ended |
--- | --- | ---
Jan. 20, 2019 | Jan. 21, 2018 | Sep. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Gain (Loss) on Sale of Assets and Asset Impairment Charges |  |  |  | $ 500 |
Facility Closing [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve |  | $ 2,961 | [1],[2] |  | $ 3,534
Restructuring Charges |  | 0 |  |  |
Restructuring Reserve, Accrual Adjustment | [3] | 146 |  |  |
Payments for Restructuring |  | (1,179) |  |  |
Facility Closing [Member] | Interest Expense [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve, Accrual Adjustment |  | 460 |  |  |
Restaurant Closing Costs [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Other Accrued Liabilities |  | $ 2,100 |  |  |
Weighted Average [Member] | Facility Closing [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
RemainingLeaseCommitmentTerm |  | 4 |  |  |
[1] | The weighted average remaining lease term related to these commitments is approximately 4 years.
[2] | This balance excludes $2.1 million of restaurant closing costs that are included in “Accrued liabilities” and “Other long-term liabilities” on our condensed consolidated balance sheets, which were initially recorded as losses on the sale of company-operated restaurants to franchisees.
[3] | 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.

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