XML 63 R53.htm IDEA: XBRL DOCUMENT
v3.22.2.2

LEASES - Rent Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Oct. 01, 2021 | Sep. 30, 2022 | Oct. 01, 2021
LEASES |  |  |  |
Rent expenses | $ 1.6 | $ 4.9 | $ 1.6 | $ 5.2

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