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Basis of Presentation - Additional Information (Details) $ in Thousands | 9 Months Ended
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Jun. 30, 2018 USD ($) wk | Jun. 24, 2017 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Limited partner interest in the Operating Partnership (in hundredths) | 100.00% |
Minimum number of weeks in the fiscal year reporting calendar | 52 |
Maximum number of weeks in the fiscal year reporting calendar | 53 |
Minimum number of weeks in a fiscal quarter | 13 |
Maximum number of weeks in a fiscal quarter | 14 |
Cash paid to taxing authorities on employee’s’ behalf for withheld shares | $ | $ 847 | $ 736

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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=107668666&loc=SL79513924-113897 + Details
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