Contract With Customer, Change In Contract Estimates, Gross Profit Threshold Amount

No definition available.

Name:	lmb_ContractWithCustomerChangeInContractEstimatesGrossProfitThresholdAmount
Namespace Prefix:	lmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the net amount of unresolved change orders and claims.

+ References

No definition available.

+ Details

Name:	lmb_NetAmountOfUnresolvedChangeOrdersAndClaims
Namespace Prefix:	lmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of Projects Subject to Gross Profit Write Ups

+ References

No definition available.

+ Details

Name:	lmb_NumberOfProjectsSubjectToGrossProfitWriteUps
Namespace Prefix:	lmb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Retainage Receivable, Percentage

+ References

No definition available.

+ Details

Name:	lmb_RetainageReceivablePercentage
Namespace Prefix:	lmb_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Total Gross Profits Adjustments, Write Ups

+ References

No definition available.

+ Details

Name:	lmb_TotalGrossProfitsAdjustmentsWriteUps
Namespace Prefix:	lmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

- Definition

Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

+ Details

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

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

Name:	us-gaap_RevenueRemainingPerformanceObligationPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2026-01-01
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2025-04-01
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Revenue from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) project	Mar. 31, 2024 USD ($) project	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Term of revenue contracts	three months to two years
Percentage completed of certain milestones	10.00%
Net amount of unresolved change orders and claims	$ 11.6		$ 10.9
Revision amount for gross profit impact on contract estimates (more than)	0.5	$ 0.5
Gross profit write ups	$ 0.9	$ 2.0
Number of projects with write ups \| project	1	2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, expected timing of satisfaction, period	24 months
ODR \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Property, Plant and Equipment [Line Items]
Remaining performance obligations, amount	$ 227.8
Revenue, remaining performance obligations, percentage	88.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	9 months
ODR \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	69.00%
GCR \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Property, Plant and Equipment [Line Items]
Remaining performance obligations, amount	$ 120.2
Revenue, remaining performance obligations, percentage	63.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	9 months
GCR \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	61.00%