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v3.24.2.u1

LEASES - Rent Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2024 | Jun. 30, 2023 | Jun. 28, 2024 | Jun. 30, 2023
LEASES |  |  |  |
Rent expenses | $ 1.8 | $ 1.8 | $ 3.5 | $ 3.4

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating lease expense. Excludes sublease income. + References No definition available. + Details
Name: | wldn_OperatingLeaseRentExpenses
Namespace Prefix: | wldn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration