Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Income Tax Reconciliation [Abstract]
Income tax provision at federal statutory tax rate	$ 13,459	$ 5,260	$ 29,768
Impact of Partnership income not subject to federal income taxes	(13,892)	(9,844)	(32,148)
Permanent differences	3	182	210
Change in valuation allowance	406	4,737	2,181
State income taxes	864	(211)	253
Other	(381)	464	436
Provision for income taxes - current and deferred	$ 459	$ 588	$ 700

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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