XML 54 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9
Notes Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 25,801us-gaap_NotesReceivableGross $ 25,806us-gaap_NotesReceivableGross
Less current portion 8,464us-gaap_NotesAndLoansReceivableGrossCurrent 8,895us-gaap_NotesAndLoansReceivableGrossCurrent
Notes receivable - non-current 17,337us-gaap_NotesAndLoansReceivableGrossNoncurrent 16,911us-gaap_NotesAndLoansReceivableGrossNoncurrent
Independent Contractors [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable 19,021us-gaap_NotesReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_IndependentContractorsMember
18,475us-gaap_NotesReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_IndependentContractorsMember
Number of notes receivable 472wern_NumberOfNotesReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_IndependentContractorsMember
466wern_NumberOfNotesReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_IndependentContractorsMember
Other Debtors [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Notes receivable $ 6,780us-gaap_NotesReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_OtherDebtorsMember
$ 7,331us-gaap_NotesReceivableGross
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= wern_OtherDebtorsMember