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Contingencies - Additional Information (Detail) In Millions, unless otherwise specified | 3 Months Ended |  |  | 1 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2015 BRL | May 31, 2012 USD ($) | Jun. 30, 2010 USD ($) | Nov. 22, 2011 Court-Imposed Interest, Fees or Inflation Adjustments Maximum USD ($) | Nov. 22, 2011 Court-Imposed Interest, Fees or Inflation Adjustments Maximum BRL
Loss Contingencies [Line Items] |  |  |  |  |
Damages asserted by BK | 20.8 us-gaap_LossContingencyDamagesSoughtValue |  |  | $ 57.0 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = wnc_OtherAdjustmentsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Total ordered damages granted to Bk |  |  |  | 8.2 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = wnc_OtherAdjustmentsMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 26.7 us-gaap_LossContingencyDamagesAwardedValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = wnc_OtherAdjustmentsMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Accrual for Environmental Loss Contingencies |  |  | 100 us-gaap_AccrualForEnvironmentalLossContingencies |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, contingent liability |  | $ 2.9 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability |  |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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- Definition The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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- Details
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- Definition Amount of damages awarded to the plaintiff in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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