XML 89 R79.htm IDEA: XBRL DOCUMENT v3.25.2

BUSINESS COMBINATIONS - Assets Acquired - Adjustments (Details) $ in Millions	6 Months Ended
	Jul. 04, 2025 USD ($)
Alternative Power Generation, Inc.
BUSINESS COMBINATIONS
Backlog and goodwill, adjustment, increase (decrease)	$ 8.6
Customer relationships and tradename, adjustment, increase (decrease)	(5.4)
Alpha Inspections, Inc.
BUSINESS COMBINATIONS
Backlog and goodwill, adjustment, increase (decrease)	$ 0.3

X

- References

No definition available.

+ Details

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

X

- Definition

Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived, Backlog, and Goodwill, Adjustment, Increase (Decrease)

+ References

No definition available.

+ Details

Name:	wldn_BusinessCombinationRecognizedAssetAcquiredIdentifiableIntangibleAssetFiniteLivedBacklogAndGoodwillAdjustmentIncreaseDecrease
Namespace Prefix:	wldn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived, Customer Relationships and Tradename, Adjustment, Increase (Decrease)

+ References

No definition available.

+ Details

Name:	wldn_BusinessCombinationRecognizedAssetAcquiredIdentifiableIntangibleAssetFiniteLivedCustomerRelationshipsAndTradenameAdjustmentIncreaseDecrease
Namespace Prefix:	wldn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=wldn_AlternativePowerGenerationIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=wldn_AlphaInspectionsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: