Reportable Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Net sales
External customers	$ 324,229	$ 277,682
Intersegment sales	0	0
Total net sales	324,229	277,682
Income (Loss) from operations	14,856	5,449
Assets	935,275	409,655	902,626
Commercial Trailer Products
Net sales
External customers	183,986	233,560
Intersegment sales	14,091	9,820
Total net sales	198,077	243,380
Income (Loss) from operations	5,320	6,187
Assets	273,002	292,495
Diversified Products
Net sales
External customers	99,689	19,002
Intersegment sales	12,305	12,588
Total net sales	111,994	31,590
Income (Loss) from operations	13,519	5,384
Assets	509,858	56,890
Retail
Net sales
External customers	40,554	25,120
Intersegment sales	289	0
Total net sales	40,843	25,120
Income (Loss) from operations	873	(75)
Assets	72,390	137,622
Corporate and Eliminations
Net sales
External customers	0	0
Intersegment sales	(26,685)	(22,408)
Total net sales	(26,685)	(22,408)
Income (Loss) from operations	(4,856)	(6,047)
Assets	$ 80,025	$ (77,352)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Concepts (CON)

-Number 6

-Paragraph 25

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Paragraph 18

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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-Subparagraph (SX 210.5-02.18)

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Number 131

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Amount of revenue from transactions with other operating segments of the same entity.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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-Section S99

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