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Acquisition (Narrative) (Details) (USD $) | 9 Months Ended | 0 Months Ended | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 13, 2015 | Mar. 31, 2015
Business Acquisition [Line Items] |  |  |  |
Purchase price, net of cash acquired | $ 92,217,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | $ 0 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |
Flatout [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price, net of cash acquired |  |  | 92,200,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember |
Purchase price adjustment for the estimate of the final net working capital |  |  |  | 200,000 us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember
Flatout [Member] | Customer Relationships [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets acquired |  |  | 5,000,000 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |
Finite-lived intangible assets acquired, useful life |  |  | 10 years |
Flatout [Member] | Technology / Know-how [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets acquired |  |  | 3,900,000 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeSecretsMember |
Finite-lived intangible assets acquired, useful life |  |  | 10 years |
Flatout [Member] | Non-compete Agreements [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets acquired |  |  | 600,000 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember |
Finite-lived intangible assets acquired, useful life |  |  | 5 years |
Flatout [Member] | Tradename [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Indefinite-lived intangible assets acquired |  |  | $ 37,600,000 us-gaap_IndefinitelivedIntangibleAssetsAcquired / us-gaap_BusinessAcquisitionAxis = lanc_FlatoutMember / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember |

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Details
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- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1500-128463 + Details
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Balance Type: | credit
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
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- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Details
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