Percentage of Title IV Program funds returned late.

No definition available.

Name:	linc_AmountOfTitleIVProgramFundsReturnedLate
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

This line item represents the composite score for financial responsibility set by by the U.S. Department of Education (the "DOE").

+ References

No definition available.

+ Details

Name:	linc_CompositeScoreForFinancialResponsibility
Namespace Prefix:	linc_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

percentage of error rate in expanded audit sample.

+ References

No definition available.

+ Details

Name:	linc_ErrorRatePercentageInExpandedAuditSample
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of Letters of credit the institution submitted for the fiscal year 2016.

+ References

No definition available.

+ Details

Name:	linc_LettersOfCreditSubmittedForFiscalYear2016
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of Letters of credit the institution submitted for the fiscal year 2017.

+ References

No definition available.

+ Details

Name:	linc_LettersOfCreditSubmittedForFiscalYear2017
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Refers to maximum notification period make disbursements to students under the Heightened Cash Monitoring 1 (HCM1) payment method, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_MaximumNotificationPeriod
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to Maximum Period for institution to participate under the Zone Alternative, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_MaximumPeriodForInstitutionToParticipateUnderTheZoneAlternative
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the maximum specified percentage of net revenues on cash basis indirectly derived from funds.

+ References

No definition available.

+ Details

Name:	linc_MaximumSpecifiedPercentageOfNetRevenuesOnCashBasisIndirectlyDerivedFromFunds
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This line item represents the composite score for institutes responsibility to be deemed financially responsible without the need for further oversight.

+ References

No definition available.

+ Details

Name:	linc_MinimumCompositeRequiredForFinancialResponsibility
Namespace Prefix:	linc_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage for Posting a letter of credit to the prior years total Title IV Program funds received by the institution during the institution's most recently completed fiscal year;

+ References

No definition available.

+ Details

Name:	linc_MinimumPercentageLetterOfCreditAmountEqualPriorYearsTotalTitleIVProgramFunds
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage for Posting a letter of credit to the total Title IV Program funds received by the institution during the institution's most recently completed fiscal year;

+ References

No definition available.

+ Details

Name:	linc_MinimumPercentageLetterOfCreditAmountEqualTotalTitleIVProgramFunds
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of students returning Title IV Program Funds Late as per audit or program review sample.

+ References

No definition available.

+ Details

Name:	linc_MinimumPercentageOfStudentsReturningTitleIVProgramFundsLate
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected minimum period by which the letters of credit will remain in place in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_MinimumPeriodByWhichTheLettersOfCreditWillRemainInPlace
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of net revenues on cash basis indirectly derived from funds.

+ References

No definition available.

+ Details

Name:	linc_PercentageOfNetRevenuesOnCashBasisIndirectlyDerivedFromFunds
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Title IV Program funds the institution may required to post a letter of credit in favor of DOE.

+ References

No definition available.

+ Details

Name:	linc_PercentageOfTitleIVProgramFundsInstitutionMayRequiredToPostALetterOfCreditInFavorOfDOE
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Title IV Program funds returned late

+ References

No definition available.

+ Details

Name:	linc_PercentageOfTitleIVProgramFundsReturnedLate
Namespace Prefix:	linc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of years for which entity may not reapply for eligibility, once became ineligible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_PeriodForWhichEntityMayNotReapplyForEligibility
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period over which entity becomes ineligible if it receives 90% of its overall revenue from the funds, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_PeriodOverWhichEntityBecameIneligibleAfterReceivingSpecifiedPercentageAsRevenueFromFunds
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to the period the institution participating in Title IV Programs must return unearned funds to the DOE or the applicable lending institution in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	linc_PeriodToReturnUnearnedTitleIVProgramFund
Namespace Prefix:	linc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This line item represents the composite score for financial responsibility set by the U.S. Department of Education (the "DOE").

+ References

No definition available.

+ Details

Name:	linc_StandardCompositeScoreForFinancialResponsibility
Namespace Prefix:	linc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=linc_USDepartmentOfEducationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FINANCIAL AID AND REGULATORY COMPLIANCE (Details)			12 Months Ended
FINANCIAL AID AND REGULATORY COMPLIANCE (Details)	Feb. 23, 2018 USD ($)	Jan. 11, 2018 USD ($)	Dec. 31, 2017 Unit	Dec. 31, 2016 Unit	Dec. 31, 2015 Unit
Public Utilities, General Disclosures [Line Items]
Percentage of net revenues on cash basis indirectly derived from funds			78.00%	79.00%	80.00%
Maximum specified percentage of net revenues on cash basis indirectly derived from funds			90.00%	90.00%	90.00%
Period over which entity became ineligible after receiving specified percentage as revenue from funds			2 years
Period for which entity may not reapply for eligibility			2 years
Composite score for financial responsibility			1.1	1.5	1.9
Minimum Composite required for financial responsibility			1.5
Maximum Period for institution to participate under the Zone Alternative			3 years
Period to return unearned Title IV Program funds			45 days
Minimum percentage of students returning Title IV Program funds late			5.00%
Percentage of Title IV Program funds in which the institution may be required to post a letter of credit in favor of DOE			25.00%
Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Percentage of Title IV Program funds returned late		3.00%
Amount of Title IV Program funds returned late \| $		$ 20,000
Error rate percentage in expanded audit sample		3.00%
Letters of credit submitted for fiscal year 2017 \| $	$ 500,000
Letters of credit submitted for fiscal year 2016 \| $	$ 100,000
Minimum period by which the letters of credit will remain in place	2 years
Maximum [Member]
Public Utilities, General Disclosures [Line Items]
Standard composite score for financial responsibility			3
Minimum [Member]
Public Utilities, General Disclosures [Line Items]
Standard composite score for financial responsibility			-1
U.S. Department of Education [Member]
Public Utilities, General Disclosures [Line Items]
Maximum notification period			10 days
Minimum percentage Letter of credit amount equal Total Title IV Program funds			50.00%
Minimum percentage Letter of credit amount equal Prior Years Total Title IV Program funds			10.00%
U.S. Department of Education [Member] \| Maximum [Member]
Public Utilities, General Disclosures [Line Items]
Composite score for financial responsibility			1.4
Minimum Composite required for financial responsibility			1.5
U.S. Department of Education [Member] \| Minimum [Member]
Public Utilities, General Disclosures [Line Items]
Composite score for financial responsibility			1.0
Minimum Composite required for financial responsibility			1.0