Other revenue generated from coin operated games or vending machine where coins are deposited for a chance to win prizes.

No definition available.

+ Details

Name:	lub_VendingRevenue
Namespace Prefix:	lub_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_AssetsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lub_CompanyOwnedRestaurantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=lub_FuddruckersTradeNameCheeseburgerInParadiseLiquorLicensesAndJimmyBuffetIntangiblesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lub_CulinaryContractServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lub_FranchiseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=lub_RoyaltyIntangiblesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Reportable Segments - Segment Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 14, 2018	Mar. 15, 2017	Mar. 14, 2018	Mar. 15, 2017	Aug. 30, 2017
ASSETS
Assets	$ 219,712		$ 219,712		$ 226,457
Vending revenue	151	$ 125	294	$ 284
Finite-lived intangible assets	29,843		29,843		29,902
Operating Segments \| Company-owned restaurants
ASSETS
Assets	183,344		183,344		189,990
Vending revenue	151	$ 125	294	$ 284
Operating Segments \| Company-owned restaurants \| Fuddruckers Trade Name Cheeseburger In Paradise Liquor Licenses And Jimmy Buffet Intangibles
ASSETS
Finite-lived intangible assets	8,700		8,700
Operating Segments \| Culinary contract services
ASSETS
Assets	7,004		7,004		3,342
Operating Segments \| Franchise operations
ASSETS
Assets	11,743		11,743		11,325
Operating Segments \| Franchise operations \| Royalty Intangibles
ASSETS
Finite-lived intangible assets	10,200		10,200
Corporate
ASSETS
Assets	$ 17,621		$ 17,621		$ 21,800