STUDENT RECEIVABLES, Write-off (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($)
Write-Off's [Abstract]
2024	$ 0
2023	7,854
2022	1,121
2021	433
2020	154
Prior	123
Total	$ 9,685

No definition available.

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

- Definition

The write-offs amount of accounts receivable originated more than five years prior to current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The write-offs amount of accounts receivable originated in five years prior to current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The write-offs amount of accounts receivable originated in four years prior to current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The write-offs amount of accounts receivable originated in current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableYearOneOriginatedCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The write-offs amount of accounts receivable originated in three years prior to current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The write-offs amount of accounts receivable originated in fiscal year prior to current fiscal year.

+ References

No definition available.

+ Details

Name:	linc_AccountsReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteOffs
Namespace Prefix:	linc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration