XML 25 R57.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Related Party Transactions (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
TDR [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Sales total | $ 2,154,000 wern_RelatedPartyTransactionEquipmentSalesTotal / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | $ 2,275,000 wern_RelatedPartyTransactionEquipmentSalesTotal / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | $ 1,551,000 wern_RelatedPartyTransactionEquipmentSalesTotal / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember
Recognized gains, net | 858,000 wern_RelatedPartyTransactionsRecognizedNetGains / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 1,449,000 wern_RelatedPartyTransactionsRecognizedNetGains / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 823,000 wern_RelatedPartyTransactionsRecognizedNetGains / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember
Related party expense | 651,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 603,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 608,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember
Other operating revenue | 4,623,000 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 4,141,000 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 3,836,000 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember
Receivables | 442,000 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 858,000 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember | 2,105,000 us-gaap_DueFromRelatedPartiesCurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wern_TdrMember
Principal Stockholder [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Lease annual rent payments | 1.00 wern_LeaseAnnualRentPayments / us-gaap_StatementEquityComponentsAxis = us-gaap_PrincipalOwnerMember |  |
Leasehold improvements to land total | 6,500,000 wern_LeaseholdImprovementsToLandTotal / us-gaap_StatementEquityComponentsAxis = us-gaap_PrincipalOwnerMember |  |
Related party expense | $ 71,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_StatementEquityComponentsAxis = us-gaap_PrincipalOwnerMember |  |

X
- Definition The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 2 -Article 4 + Details
Name: | us-gaap_DueFromRelatedPartiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of annual payment for rental of land from related party. + References No definition available. + Details
Name: | wern_LeaseAnnualRentPayments
Namespace Prefix: | wern_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gross amount, at the balance sheet date, of long-lived, depreciable assets that are an addition or improvement to assets held under lease arrangement with related party. + References No definition available. + Details
Name: | wern_LeaseholdImprovementsToLandTotal
Namespace Prefix: | wern_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash inflow associated with the sale of long-lived physical assets to a related party. + References No definition available. + Details
Name: | wern_RelatedPartyTransactionEquipmentSalesTotal
Namespace Prefix: | wern_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The difference between the sale price and the book value of long-lived physical assets sold to a related party. + References No definition available. + Details
Name: | wern_RelatedPartyTransactionsRecognizedNetGains
Namespace Prefix: | wern_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=wern_TdrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_PrincipalOwnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |