XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Investments (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2024
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Investments with Readily Determinable Fair Value | The following table summarizes the activity related to our equity investments with readily determinable fair values during the periods presented (in thousands):
| Three Months Ended March 31, |  |
| 2024 |  | 2023 |  |  |  |
Loss on investments in equity securities | $ | 138 |  |  | $ | 81 |  |  |  |  |
Portion of unrealized loss for the period related to equity securities still held at the reporting date | 138 |  |  | 81 |  |  |  |  |

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

X
- Definition Equity Securities With Readily Determinable Fair Value + References No definition available. + Details
Name: | wern_EquitySecuritiesWithReadilyDeterminableFairValueTableTextBlock
Namespace Prefix: | wern_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration