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v2.4.1.9

Components of Long Term Debt (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Debt Instrument [Line Items] |  |
Principal amount of convertible notes outstanding | $ 344,367 us-gaap_DebtInstrumentFaceAmount | $ 344,490 us-gaap_DebtInstrumentFaceAmount
Less: unamortized discount | (15,309)us-gaap_DebtInstrumentUnamortizedDiscount | (19,217)us-gaap_DebtInstrumentUnamortizedDiscount
Less: current portion | 2,429 us-gaap_LongTermDebtCurrent | 496 us-gaap_LongTermDebtCurrent
Long-term debt | 326,629 us-gaap_LongTermDebt | 324,777 us-gaap_LongTermDebt
Term loan credit agreement |  |
Debt Instrument [Line Items] |  |
Principal amount of convertible notes outstanding | 192,845 us-gaap_DebtInstrumentFaceAmount / us-gaap_LineOfCreditFacilityAxis = wnc_TermLoanCreditFaciltyMember | 192,845 us-gaap_DebtInstrumentFaceAmount / us-gaap_LineOfCreditFacilityAxis = wnc_TermLoanCreditFaciltyMember
Industrial revenue bond |  |
Debt Instrument [Line Items] |  |
Principal amount of convertible notes outstanding | 1,522 us-gaap_DebtInstrumentFaceAmount / us-gaap_LineOfCreditFacilityAxis = wnc_BondFinancingMember | 1,645 us-gaap_DebtInstrumentFaceAmount / us-gaap_LineOfCreditFacilityAxis = wnc_BondFinancingMember
Convertible Senior Notes |  |
Debt Instrument [Line Items] |  |
Principal amount of convertible notes outstanding | 150,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember | 150,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember
Less: unamortized discount | (14,362)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember | (15,399)us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember
Less: current portion | 0 us-gaap_LongTermDebtCurrent / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember | 0 us-gaap_LongTermDebtCurrent / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember
Long-term debt | $ 135,638 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember | $ 134,601 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = wnc_ConvertibleSeniorNotesMember

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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