XML 36 R26.htm IDEA: XBRL DOCUMENT
v3.22.2

Accounting Policies (Details) | 6 Months Ended
--- | ---
Jun. 30, 2022
Increase to Cash Flow from Operations [Abstract] |
Document Period End Date | Jun. 30, 2022
Current Fiscal Year End Date | --12-31

X
- Definition End date of current fiscal year in the format --MM-DD. + References No definition available. + Details
Name: | dei_CurrentFiscalYearEndDate
Namespace Prefix: | dei_
Data Type: | xbrli:gMonthDayItemType
Balance Type: | na
Period Type: | duration

X
- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. + References No definition available. + Details
Name: | dei_DocumentPeriodEndDate
Namespace Prefix: | dei_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase to Cash Flow from Operations + References No definition available. + Details
Name: | wern_IncreasetoCashFlowfromOperationsAbstract
Namespace Prefix: | wern_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration