Wabash National (WNC) 10-K 27 Feb 15 2014 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 19, 2015	Jun. 30, 2014
Document Information [Line Items]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	WNC
Entity Registrant Name	WABASH NATIONAL CORP /DE
Entity Central Index Key	879526
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Public Float			$982,842,037
Entity Common Stock, Shares Outstanding		68,669,611

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS
Cash and cash equivalents	$146,113	$113,262
Accounts receivable	135,206	120,358
Inventories	177,144	184,173
Deferred income taxes	16,993	21,576
Prepaid expenses and other	10,203	9,632
Total current assets	485,659	449,001
PROPERTY, PLANT AND EQUIPMENT	142,892	142,082
DEFERRED INCOME TAXES	0	1,401
GOODWILL	149,603	149,967
INTANGIBLE ASSETS	137,100	159,181
OTHER ASSETS	13,397	10,613
Total Assets	928,651	912,245
CURRENT LIABILITIES
Current portion of long-term debt	496	3,245
Current portion of capital lease obligations	1,458	1,609
Accounts payable	96,213	112,151
Other accrued liabilities	88,690	99,358
Total current liabilities	186,857	216,363
LONG-TERM DEBT	324,777	358,890
CAPITAL LEASE OBLIGATIONS	5,796	6,851
DEFERRED INCOME TAXES	2,349	1,234
OTHER NONCURRENT LIABILITIES	18,040	6,528
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common stock 200,000,000 shares authorized, $0.01 par value, 68,998,069 and 68,523,419 shares outstanding, respectively	709	705
Additional paid-in capital	635,606	625,971
Accumulated deficit	-216,198	-277,128
Accumulated other comprehensive loss	-637	-18
Treasury stock at cost, 1,987,073 and 1,873,870 common shares, respectively	-28,648	-27,151
Total stockholders' equity	390,832	322,379
Total Liabilities and Equity	$928,651	$912,245

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$0.01	$0.01
Common stock, shares outstanding	68,998,069	68,523,419
Treasury stock, shares	1,987,073	1,873,870

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
NET SALES	$1,863,315	$1,635,686	$1,461,854
COST OF SALES	1,630,681	1,420,563	1,298,031
Gross profit	232,634	215,123	163,823
GENERAL AND ADMINISTRATIVE EXPENSES	61,694	58,666	44,751
SELLING EXPENSES	26,676	30,597	23,589
AMORTIZATION OF INTANGIBLES	21,878	21,786	10,590
ACQUISITION EXPENSES	0	883	14,409
Income from operations	122,386	103,191	70,484
OTHER INCOME (EXPENSE):
Interest expense	-22,165	-26,308	-21,724
Other, net	-1,759	740	-97
Income before income taxes	98,462	77,623	48,663
INCOME TAX EXPENSE (BENEFIT)	37,532	31,094	-56,968
Net income	$60,930	$46,529	$105,631
BASIC NET INCOME PER SHARE	$0.88	$0.67	$1.53
DILUTED NET INCOME PER SHARE	$0.85	$0.67	$1.53

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
NET INCOME	$60,930	$46,529	$105,631
Other comprehensive (loss) income:
Foreign currency translation adjustment	-619	-266	248
Total other comprehensive (loss) income	-619	-266	248
COMPREHENSIVE INCOME	$60,311	$46,263	$105,879

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
In Thousands, except Share data
Beginning Balance at Dec. 31, 2011	$146,346	$704	$601,482	($429,288)	$0	($26,552)
Beginning Balance (in shares) at Dec. 31, 2011		68,165,668
Net income for the year	105,631	0	0	105,631	0	0
Foreign currency translation	248	0	0	0	248	0
Stock-based compensation (in shares)		186,368
Stock-based compensation	4,385	-3	4,388	0	0	0
Stock repurchase (in shares)		-54,534
Stock repurchase	-564	0	0	0	0	-564
Equity component of convertible senior notes, net of taxes	12,328	0	12,328	0	0	0
Common stock issued in connection with: Stock option exercises (in shares)		81,482
Common stock issued in connection with: Stock option exercises	353	1	352	0	0	0
Ending Balance at Dec. 31, 2012	268,727	702	618,550	-323,657	248	-27,116
Ending Balance (in shares) at Dec. 31, 2012		68,378,984
Net income for the year	46,529	0	0	46,529	0	0
Foreign currency translation	-266	0	0	0	-266	0
Stock-based compensation (in shares)		62,183
Stock-based compensation	6,822	0	6,822	0	0	0
Stock repurchase (in shares)		-3,665
Stock repurchase	-35	0	0	0	0	-35
Common stock issued in connection with: Stock option exercises (in shares)		85,917
Common stock issued in connection with: Stock option exercises	602	3	599	0	0	0
Ending Balance at Dec. 31, 2013	322,379	705	625,971	-277,128	-18	-27,151
Ending Balance (in shares) at Dec. 31, 2013		68,523,419
Net income for the year	60,930	0	0	60,930	0	0
Foreign currency translation	-619	0	0	0	-619	0
Stock-based compensation (in shares)		392,470
Stock-based compensation	7,718	4	7,714	0	0	0
Stock repurchase (in shares)		-113,203
Stock repurchase	-1,497	0	0	0	0	-1,497
Common stock issued in connection with: Stock option exercises (in shares)		195,383
Common stock issued in connection with: Stock option exercises	1,921	0	1,921	0	0	0
Ending Balance at Dec. 31, 2014	$390,832	$709	$635,606	($216,198)	($637)	($28,648)
Ending Balance (in shares) at Dec. 31, 2014		68,998,069

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income	$60,930	$46,529	$105,631
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	16,951	16,550	14,975
Amortization of intangibles	21,878	21,786	10,590
Net loss on sale of property, plant and equipment	13	140	203
Loss on debt extinguishment	1,042	1,889	0
Deferred income taxes	16,573	30,089	-57,283
Stock-based compensation	7,833	7,480	5,149
Accretion of debt discount	4,840	4,643	2,972
Changes in operating assets and liabilities
Accounts receivable	-14,848	-23,691	1,180
Inventories	3,116	6,260	41,696
Prepaid expenses and other	-571	-3,893	736
Accounts payable and accrued liabilities	-26,787	18,082	-46,786
Other, net	1,665	2,805	-3,046
Net cash provided by operating activities	92,635	128,669	76,017
Cash flows from investing activities
Capital expenditures	-19,957	-18,352	-14,916
Acquisitions, net of cash acquired	0	-15,985	-364,012
Proceeds from sale of property, plant and equipment	87	305	607
Other	4,113	2,500	-2,500
Net cash used in investing activities	-15,757	-31,532	-380,821
Cash flows from financing activities
Proceeds from exercise of stock options	1,921	600	354
Borrowings under revolving credit facilities	806	1,166	206,015
Payments under revolving credit facilities	-806	-1,166	-271,015
Principal payments under capital lease obligations	-1,898	-1,700	-1,629
Proceeds from issuance of convertible senior notes	0	0	145,500
Proceeds from issuance of term loan credit facility, net of issuance costs	0	0	292,500
Principal payments under term loan credit facility	-42,078	-62,827	-2,250
Proceeds from issuance of industrial revenue bond	0	0	2,500
Principal payments under industrial revenue bond	-475	-381	0
Debt issuance costs paid	0	-981	-5,134
Stock repurchase	-1,497	-35	-564
Proceeds from issuance of common stock, net of expenses	0	0	0
Net cash (used in) provided by financing activities	-44,027	-65,324	366,277
Net increase in cash and cash equivalents	32,851	31,813	61,473
Cash and cash equivalents at beginning of year	113,262	81,449	19,976
Cash and cash equivalents at end of year	146,113	113,262	81,449
Cash paid during the period for
Interest	16,136	20,913	16,050
Income taxes	$20,220	$941	$594

DESCRIPTION_OF_THE_BUSINESS

DESCRIPTION OF THE BUSINESS	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF THE BUSINESS		1	DESCRIPTION OF THE BUSINESS
	Wabash National Corporation (the “Company”) designs, manufactures and markets standard and customized truck and tank trailers, intermodal equipment and transportation related products under the Wabash®, Wabash National®, DuraPlate®, DuraPlate HD®, DuraPlate® XD-35®, DuraPlate AeroSkirt®, ArcticLite®, FreightPro®, RoadRailer®, TrustLock Plus®, Transcraft®, Eagle®, Eagle II®, D-Eagle®, Benson®, Walker Transport, Walker Stainless Equipment, Walker Defense Group, Walker Barrier Systems, Walker Engineered Products, Brenner®Tank, Garsite, Progress Tank, TST®, Bulk Tank International, Extract Technology®, and Beall® brand name or trademarks. The Company’s wholly-owned subsidiaries, Wabash National Trailer Centers, Inc. and Brenner Tank Services, LLC, sell new and used trailers through its retail network and provides aftermarket parts and service for the Company’s and competitors’ trailers and related equipment.

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES		2	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
		a.	Basis of Consolidation
	The consolidated financial statements reflect the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All significant intercompany profits, transactions and balances have been eliminated in consolidation.
		b.	Use of Estimates
	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that directly affect the amounts reported in its consolidated financial statements and accompanying notes. Actual results could differ from these estimates.
		c.	Revenue Recognition
	The Company recognizes revenue from the sale of its products when the customer has made a fixed commitment to purchase a product for a fixed or determinable price, collection is reasonably assured under the Company’s normal billing and credit terms and ownership and all risk of loss has been transferred to the buyer, which is normally upon shipment to or pick up by the customer. Revenues on certain long-term contracts are recorded on a percentage of completion method, measured by the actual labor incurred to the estimated total labor for each project. Revenues exclude all taxes collected from the customer. Shipping and handling fees are included in Net Sales and the associated costs included in Cost of Sales in the Consolidated Statements of Operations.
		d.	Used Trailer Trade Commitments and Residual Value Guarantees
	The Company has commitments with certain customers to accept used trailers on trade for new trailer purchases. These commitments arise in the normal course of business related to future new trailer orders at the time a new trailer order is placed by the customer. The Company acquired used trailers on trade of approximately $26.8 million, $26.2 million and $19.5 million in 2014, 2013 and 2012, respectively. As of December 31, 2014 and 2013, the Company had approximately $10.0 million and $15.6 million, respectively, of outstanding trade commitments. On occasion, the amount of the trade allowance provided for in the used trailer commitments, or cost, may exceed the net realizable value of the underlying used trailer. In these instances, the Company’s policy is to recognize the loss related to these commitments at the time the new trailer revenue is recognized. Net realizable value of used trailers is measured considering market sales data for comparable types of trailers. The net realizable value of the used trailers subject to the remaining outstanding trade commitments was estimated by the Company to be approximately $10.0 million and $15.3 million as of December 31, 2014 and 2013, respectively.
		e.	Cash and Cash Equivalents
	Cash and cash equivalents include all highly liquid investments with a maturity of three months or less at the time of purchase.
		f.	Accounts Receivable
	Accounts receivable are shown net of allowance for doubtful accounts and primarily include trade receivables. The Company records and maintains a provision for doubtful accounts for customers based upon a variety of factors including the Company’s historical collection experience, the length of time the account has been outstanding and the financial condition of the customer. If the circumstances related to specific customers were to change, the Company’s estimates with respect to the collectability of the related accounts could be further adjusted. The Company’s policy is to write-off receivables when they are determined to be uncollectible. Provisions to the allowance for doubtful accounts are charged to both General and Administrative Expenses and Selling Expenses in the Consolidated Statements of Operations. The following table presents the changes in the allowance for doubtful accounts (in thousands):
			Years Ended December 31,
			2014			2013			2012
	Balance at beginning of year		$	2,058		$	858		$	1,233
	Provision			178			908			-153
	Write-offs, net of recoveries			-1,189			292			-222
	Balance at end of year		$	1,047		$	2,058		$	858
		g.	Inventories
	Inventories are stated at the lower of cost, determined on the first-in, first-out (FIFO) method, or market. The cost of manufactured inventory includes raw material, labor and overhead. Inventories consist of the following (in thousands):
			December 31,
			2014			2013
	Raw materials and components		$	63,847		$	54,699
	Work in progress			23,145			20,749
	Finished goods			68,923			82,673
	Aftermarket parts			8,446			10,389
	Used trailers			12,783			15,663
			$	177,144		$	184,173
		h.	Prepaid Expenses and Other
	Prepaid expenses and other as of December 31, 2014 and 2013 were $10.2 million and $9.6 million, respectively. Prepaid expenses and other primarily includes items such as insurance premiums, maintenance agreements and other receivables. Insurance premiums and maintenance agreements are charged to expense over the contractual life, which is generally one year or less. Other receivables primarily consist of costs in excess of billings on long-term contracts for which the Company recognizes revenue on a percentage of completion basis.
		i.	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost, net of accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while expenditures that extend the useful life of an asset are capitalized. Depreciation is recorded using the straight-line method over the estimated useful lives of the depreciable assets. The estimated useful lives are up to 33 years for buildings and building improvements and range from three to ten years for machinery and equipment. Depreciation expense, which is recorded in Cost of Sales and General and Administrative Expenses in the Consolidated Statements of Operations, as appropriate, on property, plant and equipment was $16.5 million, $15.7 million and $12.7 million in 2014, 2013 and 2012, respectively, and includes amortization of assets recorded in connection with the Company’s capital lease agreements. In connection with the purchase of certain assets of Beall in February 2013, the Company entered into a separate ten-year capital lease agreement for Beall’s manufacturing facility in Portland, Oregon, with an obligation totaling $4.3 million. As of December 31, 2014 and 2013, the assets related to the Company’s capital lease agreements are recorded within Property, Plant and Equipment in the Consolidated Balance Sheet for the amount of $10.2 million and $10.9 million, respectively, net of accumulated depreciation of $3.7 million and $2.4 million, respectively.
	Property, plant and equipment consist of the following (in thousands):
			December 31,
			2014			2013
	Land		$	25,982		$	26,398
	Buildings and building improvements			115,856			112,208
	Machinery and equipment			210,488			200,567
	Construction in progress			10,518			9,543
			$	362,844		$	348,716
	Less: accumulated depreciation			-219,952			-206,634
			$	142,892		$	142,082
		j.	Intangible Assets
	As of December 31, 2014, the balances of intangible assets, other than goodwill, were as follows (in thousands):
			Weighted Average		Gross Intangible			Accumulated			Net Intangible
			Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks		20 years		$	39,222		$	-8,252		$	30,970
	Customer relationships		10 years			151,839			-58,534			93,305
	Technology		12 years			16,517			-3,692			12,825
	Total		12 years		$	207,578		$	-70,478		$	137,100
	As of December 31, 2013, the balances of intangible assets, other than goodwill, were as follows (in thousands):
			Weighted Average		Gross Intangible			Accumulated			Net Intangible
			Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks		20 years		$	39,222		$	-6,291		$	32,931
	Customer relationships		10 years			152,109			-40,112			111,997
	Technology		12 years			16,517			-2,264			14,253
	Total		12 years		$	207,848		$	-48,667		$	159,181
	Intangible asset amortization expense was $21.9 million, $21.8 million and $10.6 million for 2014, 2013 and 2012, respectively. Annual intangible asset amortization expense for the next 5 fiscal years is estimated to be $21.3 million in 2015; $20.1 million in 2016; $16.9 million in 2017; $15.5 million in 2018 and $14.6 million in 2019.
	k.	Goodwill
	The changes in the carrying amounts of goodwill, all of which is included in the Company’s Diversified Products segment as of December 31, 2014, except for approximately $9.9 million allocated to the Company’s Retail segment, for the years ended December 31, 2014 and 2013 were as follows (in thousands):
	Balance as of December 31, 2012		$	146,444
	Goodwill acquired			1,784
	Walker acquisition adjustment			2,054
Effects of foreign currency			-315
Balance as of December 31, 2013		$	149,967
Goodwill disposed			-500
Effects of foreign currency			136
Balance as of December 31, 2014		$	149,603
Goodwill represents the excess purchase price over fair value of the net assets acquired. The Company reviews goodwill for impairment, at the reporting unit level, annually on October 1 and whenever events or changes in circumstances indicate its carrying value may not be recoverable. In accordance with ASC 350, Intangibles – Goodwill and Other, goodwill is reviewed for impairment utilizing either a qualitative assessment or a two-step quantitative process. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary.
For reporting units in which the Company performs a quantitative analysis, the first step compares the carrying value, including goodwill, of each reporting unit with its estimated fair value. If the fair value of the reporting unit exceeds its carrying value, the goodwill is not considered impaired. If the carrying value is greater than the fair value, this suggests that an impairment may exist and a second step is required in which the implied fair value of goodwill is calculated as the excess of the fair value of the reporting unit over the fair values assigned to its assets and liabilities. If this implied fair value is less than the carrying value, the difference is recognized as an impairment loss charged to the reporting unit. In assessing goodwill using this quantitative approach, the Company establishes fair value for the purpose of impairment testing by averaging the fair value using an income and market approach. The income approach employs a discounted cash flow model incorporating similar pricing concepts used to calculate fair value in an acquisition due diligence process and a discount rate that takes into account the Company’s estimated average cost of capital. The market approach employs market multiples based on comparable publicly traded companies in similar industries as the reporting unit. Estimates of fair value are established using current and forward multiples adjusted for size and performance of the reporting unit relative to peer companies.
In assessing the qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, the Company assesses relevant events and circumstances that may impact the fair value and the carrying amount of the reporting unit. The identification of relevant events and circumstances and how these may impact a reporting unit's fair value or carrying amount involve significant judgments and assumptions. The judgments and assumptions include the identification of macroeconomic conditions, industry and market conditions, cost factors, overall financial performance and Company specific events and making the assessment on whether each relevant factor will impact the impairment test positively or negatively and the magnitude of any such impact.
For 2014, the Company completed its goodwill impairment testing during the fourth quarter using the quantitative approach. For 2013 and 2012, the Company completed its testing using the qualitative assessment. Based on the testing performed in each of these years, the Company believes it is more likely than not that the fair value of its reporting units are greater than their carrying amount. As such, no impairment of goodwill was recognized in 2014, 2013 or 2012. Furthermore, in 2014, the Company’s Retail reporting unit recognized a partial disposal of goodwill in the amount of $0.5 million resulting from the transitioning of three Retail branch locations to independent dealer facilities during the second quarter of 2014.
	l.	Other Assets
The Company capitalizes the cost of computer software developed or obtained for internal use. Capitalized software is amortized using the straight-line method over three to seven years. As of December 31, 2014 and 2013, the Company had software costs, net of amortization, of $2.2 million and $0.2 million, respectively. Amortization expense for 2014, 2013 and 2012 was $0.5 million, $0.7 million and $2.3 million, respectively.
	m.	Long-Lived Assets
Long-lived assets, consisting primarily of intangible assets and property, plant and equipment, are reviewed for impairment whenever facts and circumstances indicate that the carrying amount may not be recoverable. Specifically, this process involves comparing an asset’s carrying value to the estimated undiscounted future cash flows the asset is expected to generate over its remaining life. If this process were to result in the conclusion that the carrying value of a long-lived asset would not be recoverable, a write-down of the asset to fair value would be recorded through a charge to operations. Fair value is determined based upon discounted cash flows or appraisals as appropriate.
	n.	Other Accrued Liabilities
The following table presents the major components of Other Accrued Liabilities (in thousands):
		December 31,
		2014			2013
Payroll and related taxes		$	30,362		$	29,399
Customer deposits			21,680			30,730
Warranty			15,462			14,719
Accrued taxes			8,371			8,520
Self-insurance			7,543			9,419
All other			5,272			6,571
		$	88,690		$	99,358
The following table presents the changes in the product warranty accrual included in Other Accrued Liabilities (in thousands):
		2014			2013
Balance as of January 1		$	14,719		$	14,886
Provision for warranties issued in current year			7,058			6,269
Recovery of pre-existing warranties			-296			-779
Payments			-6,019			-5,657
Balance as of December 31		$	15,462		$	14,719
The Company offers a limited warranty for its products with a coverage period that ranges between one and five years, except that the coverage period for DuraPlate® trailer panels beginning with those panels manufactured in 2005 or after is ten years. The Company passes through component manufacturers’ warranties to our customers. The Company’s policy is to accrue the estimated cost of warranty coverage at the time of the sale.
The following table presents the changes in the self-insurance accrual included in Other Accrued Liabilities (in thousands):
		Self-Insurance
		Accrual
Balance as of January 1, 2013		$	7,711
Expense			38,467
Payments			-36,759
Balance as of December 31, 2013		$	9,419
Expense			35,555
Payments			-37,431
Balance as of December 31, 2014		$	7,543
The Company is self-insured up to specified limits for medical and workers’ compensation coverage. The self-insurance reserves have been recorded to reflect the undiscounted estimated liabilities, including claims incurred but not reported, as well as catastrophic claims as appropriate.
	o.	Income Taxes
The Company determines its provision or benefit for income taxes under the asset and liability method. The asset and liability method measures the expected tax impact at current enacted rates of future taxable income or deductions resulting from differences in the tax and financial reporting basis of assets and liabilities reflected in the Consolidated Balance Sheets. Future tax benefits of tax losses and credit carryforwards are recognized as deferred tax assets. Deferred tax assets are reduced by a valuation allowance to the extent management determines that it is more-likely-than-not the Company would not realize the value of these assets.
The Company accounts for income tax contingencies by prescribing a “more-likely-than-not” recognition threshold that a tax position is required to meet before being recognized in the financial statements.
	p.	Concentration of Credit Risk
Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash, cash equivalents and customer receivables. We place our cash and cash equivalents with high quality financial institutions. Generally, we do not require collateral or other security to support customer receivables.
	q.	Research and Development
Research and development expenses are charged to earnings as incurred and were $1.7 million, $2.2 million and $1.7 million in 2014, 2013 and 2012, respectively.
	r.	New Accounting Pronouncements
In July 2013, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2013-11, Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU requires an entity to present unrecognized tax benefits as a reduction to deferred tax assets when a net operating loss carryforward, similar tax loss or a tax credit carryforward exists, with limited exceptions. ASU 2013-11 became effective for fiscal years beginning on or after December 15, 2013, and for interim periods within those fiscal years. The adoption did not have a material effect on the Company’s audited consolidated financial statements.
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) 605, Revenue Recognition. This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The effective date will be the first quarter of fiscal year 2017 using one of two retrospective application methods. The Company is currently assessing the potential impact of the adoption of ASU 2014-09 on its financial statements and related disclosures and has not yet decided on a transition method.
In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern, which requires management to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and provide related footnote disclosures. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2016. Early adoption is permitted for financial statements that have not been previously issued. The standard allows for either a full retrospective or modified retrospective transition method. The Company does not expect this standard to have a material impact on the Company’s financial statements upon adoption.

ACQUISITION

ACQUISITION	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
ACQUISITION		3	ACQUISITIONS
	Assets of Beall Corporation
	On February 4, 2013, the Company completed the acquisition of certain assets of the tank and trailer business of Beall Corporation, a Portland, Oregon-based manufacturer of aluminum tank trailers and related equipment (“Beall”). Beall Corporation began Chapter 11 reorganization proceedings in September of 2012, followed by a bankruptcy-court approved auction of its assets in December. The Company was the winning bidder for certain assets of Beall’s tank and trailer business, including equipment, inventory, certain product designs, intellectual property and other related assets. The aggregate consideration paid by the Company for the acquired assets and the assumed liabilities was $13.9 million and was allocated to the opening balance sheet as follows (in thousands):
	Current assets		$	1,035
	Property, plant and equipment			2,714
	Intangibles			8,860
	Goodwill			1,784
	Total assets		$	14,393
	Current liabilities		$	-462
	Total liabilities		$	-462
	Acquisition		$	13,931
	Intangible assets of $8.9 million were recorded as a result of the purchase of the Beall assets. The intangible assets consist of the following (in thousands):
			Amount		Useful Life
	Tradenames and Trademarks		$	1,622	20 years
	Technology			1,217	8 years
	Customer relationships			6,021	8 years
			$	8,860
	Goodwill of $1.8 million was recorded as a result of the Beall asset purchase. Goodwill is comprised of operational synergies that are expected to be realized in both the short and long-term and the opportunity to complement our existing Diversified Products segment through product line expansion and geographic growth. The Company expects the amount recorded as goodwill to be fully deductible for tax purposes.
	In connection with the purchase of certain assets of Beall, the Company entered into a separate ten year capital lease agreement for Beall’s manufacturing facility in Portland, Oregon, with payments totaling approximately $4.7 million for such ten year period.
	Walker Group Holdings LLC
	On May 8, 2012, the Company completed the acquisition (the “Walker Acquisition”) of all the equity interests of Walker Group Holdings LLC (“Walker”) from Walker Group Resources LLC, the parent of Walker (“Seller”), pursuant to the Purchase and Sale Agreement, dated March 26, 2012, by and among the Company, Walker and Seller (the “Purchase and Sale Agreement”). The aggregate consideration paid by the Company for the Walker Acquisition was $377.0 million in cash. The amount of working capital acquired at the date of acquisition, previously in dispute between the Company and the Seller, was resolved during the second quarter of 2013 and the outcome required the Company to make an additional payment of $2.1 million, which was recorded to Goodwill. The Company financed the Walker Acquisition and related fees and expenses using the proceeds from the Company’s offering of 3.375% Convertible Senior Notes due 2018 and the Company’s borrowings under the Term Loan Credit Agreement (as described in further detail in Note 6).
	Walker is a manufacturer of liquid-transportation systems and engineered products based in New Lisbon, Wisconsin. Walker manufacturing operations are integrated into the Company’s Diversified Products segment while Walker retail operations are integrated into the Retail segment in a manner that is consistent with its focus to leverage operational and market synergies. Walker has manufacturing facilities for its liquid-transportation products in New Lisbon, Wisconsin; Fond du Lac, Wisconsin; Kansas City, Missouri; Kansas City, Kansas; and Queretaro, Mexico with parts and service centers in Houston, Texas; Baton Rouge, Louisiana; Findlay, Ohio; Chicago, Illinois; Mauston, Wisconsin; West Memphis, Arkansas; and Ashland, Kentucky. Manufacturing facilities for Walker’s engineered products are located in New Lisbon, Wisconsin; Elroy, Wisconsin; and Huddersfield, United Kingdom with parts and service centers in Tavares, Florida; Dallas, Texas; and Philadelphia, Pennsylvania.
	The aggregate purchase price of $377.0 million was allocated to the opening balance sheet of Walker at May 8, 2012, the date of acquisition, as follows (in thousands):
	Cash		$	10,982
	Current assets			93,409
	Property, plant and equipment			32,541
	Intangibles			162,800
	Deferred income taxes			4,640
	Goodwill			148,498
	Total assets		$	452,870
	Current liabilities		$	-74,722
	Deferred income taxes			-1,100
	Total liabilities		$	-75,822
			$	377,048
	Acquisition, net of cash acquired		$	366,066
	Intangible assets of $162.8 million were recorded as a result of the acquisition. The intangible assets consist of the following (in thousands):
			Amount		Useful Life
	Backlog		$	900	Less than 1 year
	Tradenames and Trademarks			27,600	20 years
	Technology			15,300	12 years
	Customer relationships			119,000	10 years
			$	162,800
	Goodwill of $148.5 million was recorded as a result of the Walker Acquisition in the Diversified Products and Retail segments. Goodwill is comprised of operational synergies that are expected to be realized in both the short and long-term and the opportunity to enter new market sectors with higher margin potential, which will enable us to deliver greater value to our customers and shareholders. The Company expects the amount recorded as goodwill for the Walker Acquisition to be fully deductible for tax purposes.
	The results of Walker are included in the Consolidated Statements of Operations from the date of acquisition. Net sales and income before income taxes attributable to Walker for the year ended December 31, 2012 was $270.1 million and $34.4 million, respectively.
	The following unaudited pro forma information is shown below as if the acquisition of Walker had been completed as of the beginning of the earliest period presented (in thousands, except per share amounts):
			Twelve Months Ended
			December 31, 2012
	Sales		$	1,597,920
	Operating income		$	98,019
	Net income		$	123,030
	Basic net income per share		$	1.79
	Diluted net income per share		$	1.78
	The information presented above is for informational purposes only and is not necessarily indicative of the actual results that would have occurred had the acquisition been consummated at January 1, 2012, nor is it necessarily indicative of future operating results of the combined companies under the ownership and management of the Company.
	The Company incurred various costs related to both the Walker Acquisition and the purchase of certain assets of Beall including fees paid to an investment banker for acquisition services and the related bridge financing commitment, as well as professional fees for diligence, legal and accounting services. These costs totaled $0.9 million and $14.4 million in 2013 and 2012, respectively, and have been recorded as Acquisition Expenses in the Consolidated Statements of Operations.

PER_SHARE_OF_COMMON_STOCK

PER SHARE OF COMMON STOCK	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
PER SHARE OF COMMON STOCK	4	PER SHARE OF COMMON STOCK
	Per share results have been calculated based on the average number of common shares outstanding. The calculation of basic and diluted net income per share is determined using net income applicable to common stockholders as the numerator and the number of shares included in the denominator as follows (in thousands, except per share amounts):
			Years Ended December 31,
			2014		2013		2012
	Basic net income per share
	Net income applicable to common stockholders		$	60,930	$	46,529	$	105,631
	Undistributed earnings allocated to participating securities			-481		-457		-904
	Net income applicable to common stockholders excluding amounts applicable to participating securities		$	60,449	$	46,072	$	104,727
	Weighted average common shares outstanding			68,895		68,460		68,325
	Basic net income per share		$	0.88	$	0.67	$	1.53
	Diluted net income per share:
	Net income applicable to common stockholders		$	60,930	$	46,529	$	105,631
	Undistributed earnings allocated to participating securities			-481		-457		-904
	Net income applicable to common stockholders excluding amounts applicable to participating securities		$	60,449	$	46,072	$	104,727
	Weighted average common shares outstanding			68,895		68,460		68,325
	Dilutive shares from assumed conversion of convertible senior notes			1,354		63		-
	Dilutive stock options and restricted stock			814		558		239
	Diluted weighted average common shares outstanding			71,063		69,081		68,564
	Diluted net income per share		$	0.85	$	0.67	$	1.53
	Average diluted shares outstanding for the periods ended December 31, 2014, 2013 and 2012 exclude options to purchase common shares totaling 581, 1,121 and 1,676, respectively, because the exercise prices were greater than the average market price of the common shares. In addition, for 2012 the calculation of diluted net income per share excludes the impact of the Company’s Notes as the average stock price of the Company’s common stock for that period was below the initial conversion price of approximately $11.70 per share.

LEASE_ARRANGEMENTS

LEASE ARRANGEMENTS	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
LEASE ARRANGEMENTS	5	LEASE ARRANGEMENTS
	The Company leases office space, manufacturing, warehouse and service facilities and equipment for varying periods under both operating and capital lease agreements. Future minimum lease payments required under these lease commitments as of December 31, 2014 are as follows (in thousands):
			Capital		Operating
			Leases		Leases
	2015			1,728		2,422
	2016			1,416		1,948
	2017			1,071		1,312
	2018			926		834
	2019			834		523
	Thereafter			2,172		115
	Total minimum lease payments		$	8,147	$	7,154
	Interest			-893
	Present value of net minimum lease payments		$	7,254
	Total rental expense was $5.8 million, $4.6 million and $3.6 million for 2014, 2013 and 2012, respectively. As of December 31, 2014 the total minimum rentals to be received in future periods under these lease commitments was less than $0.1 million.

DEBT

DEBT	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
DEBT	6	DEBT
	Long-term debt consists of the following (in thousands):
			December 31,
			2014		2013
	Convertible senior notes		$	150,000	$	150,000
	Term loan credit agreement			192,845		234,923
	Industrial revenue bond			1,645		2,119
			$	344,490	$	387,042
	Less: unamortized discount			-19,217		-24,907
	Less: current portion			-496		-3,245
			$	324,777	$	358,890
	Maturities of long-term debt for the five years succeeding December 31, 2014 and thereafter are as follows (in thousands):
	2015			496
	2016			517
	2017			539
	2018			150,093
	2019			192,845
	Maturities of long-term debt		$	344,490
	Convertible Senior Notes
	In April 2012, the Company issued Convertible Senior Notes due 2018 (the “Notes”) with an aggregate principal amount of $150 million in a public offering. The Notes bear interest at the rate of 3.375% per annum from the date of issuance, payable semi-annually on May 1 and November 1. The Notes are senior unsecured obligations of the Company ranking equally with its existing and future senior unsecured debt.
	The Notes are convertible by their holders into cash, shares of the Company’s common stock or any combination thereof at the Company’s election, at an initial conversion rate of 85.4372 shares of the Company’s common stock per $1,000 in principal amount of Notes, which is equal to an initial conversion price of approximately $11.70 per share, only under the following circumstances: (A) before November 1, 2017 (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2012 (and only during such calendar quarter), if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the trading price (as defined in the indenture for the Notes) per $1,000 principal amount of Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; and (3) upon the occurrence of specified corporate events as described in the indenture for the Notes; and (B) at any time on or after November 1, 2017 until the close of business on the second business day immediately preceding the maturity date. As of December 31, 2014, the Notes were not convertible based on the above criteria. If the Notes were converted as of December 31, 2014, the if-converted value would exceed the principal amount by approximately $8 million.
	It is the Company’s intent to settle conversions through a net share settlement, which involves repayment of cash for the principal portion and delivery of shares of common stock for the excess of the conversion value over the principal portion. The Company used the net proceeds of approximately $145.1 million from the sale of the Notes to fund a portion of the purchase price of the Walker Acquisition.
	The Company accounts separately for the liability and equity components of the Notes in accordance with authoritative guidance for convertible debt instruments that may be settled in cash upon conversion. The guidance required the carrying amount of the liability component to be estimated by measuring the fair value of a similar liability that does not have an associated conversion feature. The Company determined that senior, unsecured corporate bonds traded on the market represent a similar liability to the Notes without the conversion option. Based on market data available for publicly traded, senior, unsecured corporate bonds issued by companies in the same industry and with similar maturity, the Company estimated the implied interest rate of the Notes to be 7.0%, assuming no conversion option. Assumptions used in the estimate represent what market participants would use in pricing the liability component, including market interest rates, credit standing, and yield curves, all of which are defined as Level 2 observable inputs. The estimated implied interest rate was applied to the Notes, which resulted in a fair value of the liability component of $123.8 million upon issuance, calculated as the present value of implied future payments based on the $150.0 million aggregate principal amount. The $21.7 million difference between the cash proceeds before offering expenses of $145.5 million and the estimated fair value of the liability component was recorded in additional paid-in capital. The discount on the liability portion of the Notes is being amortized over the life of the Notes using the effective interest rate method.
	The Company applies the treasury stock method in calculating the dilutive impact of the Notes. For the year ended December 31, 2014, the Notes had a dilutive impact.
	The following table summarizes information about the equity and liability components of the Notes (dollars in thousands). The fair value of the notes outstanding were measured based on quoted market prices.
			December 31,
			2014		2013
	Principal amount of convertible notes outstanding		$	150,000	$	150,000
	Unamortized discount of liability component			-15,399		-19,372
	Net carrying amount of liability component			134,601		130,628
	Less: current portion			-		-
	Long-term debt		$	134,601	$	130,628
	Carrying value of equity component, net of issuance costs		$	20,993	$	20,993
	Remaining amortization period of discount on the liability component			3.3 years		4.3 years
	Contractual coupon interest expense and accretion of discount on the liability component for the Note for the years ended December 31, 2014 and 2013 were as follow (in thousands):
			Years Ended December 31,
			2014		2013		2012
	Contractual coupon interest expense		$	5,063	$	5,063	$	3,488
	Accretion of discount on the liability component		$	3,973	$	3,710	$	2,411
	Revolving Credit Agreement
	In May 2012 the Company entered into an amendment and restatement of its then-existing senior secured revolving credit facility among the Company, certain of its subsidiaries (together with the Company, the “Borrowers”), Wells Fargo Capital Finance, LLC, as joint lead arranger, joint bookrunner and administrative agent (the “Revolver Agent”), RBS Citizens Business Capital, a division of RBS Citizens, N.A., as joint lead arranger, joint bookrunner and syndication agent, and the other lenders named therein, as amended (the “Amended and Restated Revolving Credit Agreement”). Also in May 2012, certain of the Company’s subsidiaries (the “Revolver Guarantors”) entered into a general continuing guarantee of the Borrowers’ obligations under the Amended and Restated Revolving Credit Agreement in favor of the lenders (the “Revolver Guarantee”).
	The Amended and Restated Revolving Credit Agreement is guaranteed by the Revolver Guarantors and is secured by (i) first priority security interests (subject only to customary permitted liens and certain other permitted liens) in substantially all personal property of the Borrowers and the Revolver Guarantors, consisting of accounts receivable, inventory, cash, deposit and securities accounts and any cash or other assets in such accounts and, to the extent evidencing or otherwise related to such property, all general intangibles, licenses, intercompany debt, letter of credit rights, commercial tort claims, chattel paper, instruments, supporting obligations, documents and payment intangibles (collectively, the “Revolver Priority Collateral”), and (ii) second-priority liens on and security interests in (subject only to the liens securing the Term Loan Credit Agreement customary permitted liens and certain other permitted liens) (A) equity interests of each direct subsidiary held by the Borrower and each Revolving Guarantor (subject to customary limitations in the case of the equity of foreign subsidiaries), and (B) substantially all other tangible and intangible assets of the Borrowers and the Revolving Guarantors including equipment, general intangibles, intercompany notes, insurance policies, investment property, intellectual property and material owned real property (in each case, except to the extent constituting Revolver Priority Collateral) (collectively, the “Term Priority Collateral”). The respective priorities of the security interests securing the Amended and Restated Revolving Credit Agreement and the Term Loan Credit Agreement are governed by an Intercreditor Agreement between the Revolver Agent and the Term Agent (as defined below) (the “Intercreditor Agreement”). The Amended and Restated Revolving Credit Agreement has a scheduled maturity date of May 8, 2017.
	Under the Amended and Restated Revolving Credit Agreement, the lenders agree to make available to the Company a $150 million revolving credit facility. The Company has the option to increase the total commitment under the facility to $200 million, subject to certain conditions, including (i) obtaining commitments from any one or more lenders, whether or not currently party to the Amended and Restated Revolving Credit Agreement, to provide such increased amounts and (ii) the available amount of increases to the facility being reduced by the amount of any incremental loans advanced under the Term Loan Credit Agreement in excess of $25 million. Availability under the Amended and Restated Revolving Credit Agreement will be based upon monthly (or more frequent under certain circumstances) borrowing base certifications of the Borrowers’ eligible inventory and eligible accounts receivable, and will be reduced by certain reserves in effect from time to time. Subject to availability, the Amended and Restated Revolving Credit Agreement provides for a letter of credit subfacility in an amount not in excess of $15 million, and allows for swingline loans in an amount not in excess of $10 million. Outstanding borrowings under the Amended and Restated Revolving Credit Agreement will bear interest at a rate, at the Borrowers’ election, equal to (i) LIBOR plus a margin ranging from 1.75% to 2.25% or (ii) a base rate plus a margin ranging from 0.75% to 1.25%, in each case depending upon the monthly average excess availability under the revolving loan facility. The Borrowers are required to pay a monthly unused line fee equal to 0.375% times the average daily unused availability along with other customary fees and expenses of the Revolver Agent and the lenders.
	The Amended and Restated Revolving Credit Agreement contains customary covenants limiting the ability of the Company and certain of its affiliates to, among other things, pay cash dividends, incur debt or liens, redeem or repurchase stock, enter into transactions with affiliates, merge, dissolve, repay subordinated indebtedness, make investments and dispose of assets. In addition, the Company is required to maintain a minimum fixed charge coverage ratio of not less than 1.1 to 1.0 as of the end of any period of 12 fiscal months when excess availability under the Amended and Restated Revolving Credit Agreement is less than 12.5% of the total revolving commitment.
	If availability under the Amended and Restated Revolving Credit Agreement is less than 15% of the total revolving commitment or if there exists an event of default, amounts in any of the Borrowers’ and the Revolver Guarantors’ deposit accounts (other than certain excluded accounts) will be transferred daily into a blocked account held by the Revolver Agent and applied to reduce the outstanding amounts under the facility.
	Subject to the terms of the Intercreditor Agreement, if the covenants under the Amended and Restated Revolving Credit Agreement are breached, the lenders may, subject to various customary cure rights, require the immediate payment of all amounts outstanding and foreclose on collateral. Other customary events of default in the Amended and Restated Revolving Credit Agreement include, without limitation, failure to pay obligations when due, initiation of insolvency proceedings, defaults on certain other indebtedness, and the incurrence of certain judgments that are not stayed, satisfied, bonded or discharged within 30 days.
	As of December 31, 2014 and 2013, the Company had no outstanding borrowings under the Amended and Restated Revolving Credit Agreement and was in compliance with all covenants. The Company’s liquidity position, defined as cash on hand and available borrowing capacity on the revolving credit facility, amounted to $289.9 million as of December 31, 2014.
	Term Loan Credit Agreement
	In May 2012 the Company entered into a credit agreement among the Company, the several lenders from time to time party thereto, Morgan Stanley Senior Funding, Inc., as administrative agent, joint lead arranger and joint bookrunner (the “Term Agent”), and Wells Fargo Securities, LLC, as joint lead arranger and joint bookrunner, as amended (the “Term Loan Credit Agreement”), which provided for a senior secured term loan facility of $300 million to be advanced at closing and provides for a senior secured incremental term loan facility of up to $75 million, subject to certain conditions, including (i) obtaining commitments from any one or more lenders, whether or not currently party to the Term Loan Credit Agreement, to provide such increased amounts and (ii) the available amount of incremental loans being reduced by the amount of any increases in the maximum revolver amount under the Amended and Restated Revolving Credit Agreement (discussed above). Also in May 2012, certain of the Company’s subsidiaries (the “Term Guarantors”) entered into a general continuing guarantee of the Company’s obligations under the Term Loan Credit Agreement in favor of the Term Agent (the “Term Guarantee”).
	In April 2013, the Company entered into Amendment No.1 to Credit Agreement (the “Amendment”), which became effective on May 9, 2013 and amended the Term Loan Credit Agreement. As of the Amendment date, there was approximately $297.0 million of term loans outstanding under the Term Loan Credit Agreement (the “Initial Loans”), of which the Company prepaid $20.0 million in connection with the Amendment. Under the Amendment, the lenders agreed to provide to the Company term loans in an aggregate principal amount of $277.0 million, which were exchanged for and used to refinance the Initial Loans (the “Tranche B-1 Loans”). The Tranche B-1 Loans mature on May 8, 2019, but provide for an accelerated maturity in the event the Company’s outstanding 3.375% Convertible Senior Notes due 2018 are not converted, redeemed, repurchased or refinanced in full on or before the date that is 91 days prior to the maturity date thereof. The Tranche B-1 Loans shall amortize in equal quarterly installments in aggregate amounts equal to 0.25% of the Tranche B-1 Loan amount, with the balance payable at maturity, and will bear interest at a rate, at the Company’s election, equal to (i) LIBOR (subject to a floor of 1.00%) plus a margin of 3.50% or (ii) a base rate plus a margin of 2.50%. As of December 31, 2014, the interest rate under the Term Loan Credit Agreement was 4.5%
	The Term Loan Credit Agreement is guaranteed by the Term Guarantors and is secured by (i) first-priority liens on and security interests in the Term Priority Collateral, and (ii) second-priority security interests in the Revolver Priority Collateral. In addition, the Amendment amended the Term Loan Credit Agreement, by among other things, removing the covenant that the Company be required to maintain a minimum interest coverage ratio. The Term Loan Credit Agreement requires the Company to maintain a maximum senior secured leverage ratio tested as of the last day of each fiscal quarter for the four consecutive fiscal quarters then ending of not more than (A) 4.5 to 1.0 through September 30, 2013, (B) 4.0 to 1.0 thereafter through September 30, 2015, and (C) 3.5 to 1.0 thereafter. The Term Loan Credit Agreement also contains conditions providing for either voluntary or mandatory prepayments. Conditions for mandatory prepayments include but are not limited to asset sales with proceeds in excess of $1 million and the amount of excess cash flows, as defined in the Term Loan Credit Agreement, as amended, to be calculated annually with the delivery of financial statements.
	The Term Loan Credit Agreement contains customary covenants limiting the Company’s ability to, among other things, pay cash dividends, incur debt or liens, redeem or repurchase stock, enter into transactions with affiliates, merge, dissolve, pay off subordinated indebtedness, make investments and dispose of assets.
	Subject to the terms of the Intercreditor Agreement, if the covenants under the Term Loan Credit Agreement are breached, the lenders may, subject to various customary cure rights, require the immediate payment of all amounts outstanding and foreclose on collateral. Other customary events of default in the Term Loan Credit Agreement include, without limitation, failure to pay obligations when due, initiation of insolvency proceedings, defaults on certain other indebtedness, and the incurrence of certain judgments that are not stayed, satisfied, bonded or discharged within 60 days.
	As of December 31, 2014, the Company’s senior secured leverage ratio was 0.3:1.0, and was in compliance with all covenants under the Amendment.
	For the years ended December 31, 2014, 2013 and 2012, under the Term Loan Credit Agreement the Company paid interest of $10.0 million, $14.9 million, and $10.9 million, respectively, and principal of $42.1 million and $62.8 million during 2014 and 2013, respectively. As of December 31, 2014, the Company had $192.8 million outstanding under the Term Loan Credit Agreement, all of which was classified as long-term debt on the Company’s Consolidated Balance Sheet as a result of the Company’s election to apply a voluntary principal payment in September 2014 in a manner that fulfilled the Company’s obligation to pay the future mandatory quarterly amortization installments required by the Term Loan Credit Agreement. In connection with the closing of the Term Loan Credit Agreement in May 2012 and the Amendment in April 2013, the Company paid a total of $8.5 million in original issuance discount fees which are being amortized over the life of the facility using the effective interest rate method.
	For the years ended December 31, 2014, 2013 and 2012, the Company charged $0.9 million, $0.9 million and $0.6 million, respectively, of amortization for original issuance discount fees as Interest Expense in the Consolidated Statements of Operations. In addition, for the years ended December 31, 2014 and 2013, the Company charged $0.9 million and $1.4 million, respectively, of accelerated amortization in connection with its voluntary principal payments as Other, net in the Consolidated Statements of Operations
	Other Debt Facilities
	In November 2012, the Company entered into a loan agreement with GE Government Finance, Inc. as lender and the County of Trigg, Kentucky as issuer for a $2.5 million Industrial Revenue Bond. The funds received were used to purchase the equipment needed for the expansion of the Company’s Cadiz, Kentucky facility. The loan bears interest at a rate of 4.25% and matures in March 2018. As of December 31, 2014, the Company had $1.6 million outstanding of which $0.5 million was classified as current on our Consolidated Balance Sheet.

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	7	FAIR VALUE MEASUREMENTS
	The Company’s fair value measurements are based upon a three-level valuation hierarchy. These valuation techniques are based upon the transparency of inputs (observable and unobservable) to the valuation of an asset or liability as of the measurement date. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy:
		⋅	Level 1 — Valuation is based on quoted prices for identical assets or liabilities in active markets;
		⋅	Level 2 — Valuation is based on quoted prices for similar assets or liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for the full term of the financial instrument; and
		⋅	Level 3 — Valuation is based upon other unobservable inputs that are significant to the fair value measurement.
	Recurring Fair Value Measurements
	The Company maintains a non-qualified deferred compensation plan which is offered to senior management and other key employees. The amount owed to participants is an unfunded and unsecured general obligation of the Company. Participants are offered various investment options with which to invest the amount owed to them, and the plan administrator maintains a record of the liability owed to participants by investment. To minimize the impact of the change in market value of this liability, the Company has elected to purchase a separate portfolio of investments through the plan administrator similar to those chosen by the participant.
	The investments purchased by the Company (asset) as of December 31, 2014, include mutual funds, $0.4 million of which are classified as Level 1, and life-insurance contracts valued based on the performance of underlying mutual funds, $7.4 million of which are classified as Level 2, as compared to $0.5 million and $5.1 million for mutual funds and life insurance contracts at December 31, 2013, respectively.
	Nonrecurring Fair Value Measurements
	Certain nonfinancial assets and liabilities are measured at fair value on a nonrecurring basis and are subject to fair value adjustments in certain circumstances, such as when there is evidence of impairment.
	The Company reviews for goodwill impairment annually and whenever events or changes in circumstances indicate its carrying value may not be recoverable. The fair value of the reporting units is determined using the income approach. The income approach focuses on the income-producing capability of an asset, measuring the current value of the asset by calculating the present value of its future economic benefits such as cash earnings, cost savings, corporate tax structure and product offerings. Value indications are developed by discounting expected cash flows to their present value at a rate of return that incorporates the risk-free rate for the use of funds, the expected rate of inflation and risks associated with the reporting unit. These assets would generally be classified within Level 3, in the event that the Company were required to measure and record such assets at fair value within its consolidated financial statements.
	The Company periodically evaluates the carrying value of long-lived assets to be held and used, including definite-lived intangible assets and property plant and equipment, when events or circumstances warrant such a review. Fair value is determined primarily using anticipated cash flows assumed by a market participant discounted at a rate commensurate with the risk involved and these assets would generally be classified within Level 3, in the event that the Company were required to measure and record such assets at fair value within its consolidated financial statements.
	Assets and liabilities acquired in business combinations are recorded at their fair value as of the date of acquisition. Refer to Note 3 for the fair values of assets acquired and liabilities assumed in connection with the acquisitions of Walker and certain assets of Beall.
	The carrying amounts of accounts receivable and accounts payable reported in the Consolidated Balance Sheets approximate fair value.
	Estimated Fair Value of Debt
	The estimated fair value of long-term debt at December 31, 2014 consists primarily of the Company’s Notes and borrowings under its Term Loan Credit Agreement, as amended (see Note 6). The fair value of the Notes, the Term Loan Credit Agreement, as amended, and the revolving credit facility are based upon third party pricing sources, which generally does not represent daily market activity, nor does it represent data obtained from an exchange, and are classified as Level 2. The interest rates on the Company’s borrowings under the revolving credit facility are adjusted regularly to reflect current market rates and thus carrying value approximates fair value for these borrowings. All other debt and capital lease obligations approximate their fair value as determined by discounted cash flows and are classified as Level 3.
	The Company’s carrying and estimated fair value of debt, at December 31, 2014 and 2013 were as follows:
			December 31, 2014								December 31, 2013
			Carrying		Fair Value						Carrying		Fair Value
			Value		Level 1		Level 2		Level 3		Value		Level 1		Level 2		Level 3
	Instrument
	Convertible senior notes		$	134,601	$	-	$	188,490	$	-	$	130,628	$	-	$	197,718	$	-
	Term loan credit agreement			189,027		-		192,845		-		229,388		-		236,684		-
	Industrial revenue bond			1,645		-		-		1,645		2,119		-		-		2,119
	Capital lease obligations			7,254		-		-		7,254		8,460		-		-		8,460
			$	332,527	$	-	$	381,335	$	8,899	$	370,595	$	-	$	434,402	$	10,579

STOCKHOLDERS_EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
STOCKHOLDERS' EQUITY	8	STOCKHOLDERS’ EQUITY
		a.	Common and Preferred Stock
	On December 18, 2014, the Company’s Board of Directors approved a stock repurchase program authorizing the Company to repurchase up to $60 million of its common stock over a two year period ending on December 31, 2016. Stock repurchases under this program may be made in open market or in private transactions at times and in amounts that management deems appropriate. As of December 31, 2014, no stock repurchases have been made under the program.
	The Board of Directors has the authority to issue common and unclassed preferred stock of up to 200 million shares and 25 million shares, respectively, with par value of $0.01 per share as well as to fix dividends, voting and conversion rights, redemption provisions, liquidation preferences and other rights and restrictions.
	The Company has a series of 300,000 shares of preferred stock designated as Series D Junior Participating Preferred Stock, par value $0.01 per share. As of December 31, 2014 and 2013, the Company had no Series D Junior Participating shares issued or outstanding.
		b.	Stockholders’ Rights Plan
	The Company has a Stockholders’ Rights Plan (the “Rights Plan”) that is designed to deter coercive or unfair takeover tactics in the event of an unsolicited takeover attempt. It is not intended to prevent a takeover on terms that are favorable and fair to all stockholders and will not interfere with a merger approved by our board of directors. Each right entitles stockholders to buy one one-thousandth of a share of Series D Junior Participating Preferred Stock at an exercise price of $120. The rights will be exercisable only if a person or a group acquires or announces a tender or exchange offer to acquire 20% or more of our common stock or if we enter into other business combination transactions not approved by our board of directors. In the event the rights become exercisable, the Rights Plan allows for our stockholders to acquire our stock or the stock of the surviving corporation, whether or not we are the surviving corporation, having a value twice that of the exercise price of the rights. These rights pursuant to the Rights Plan will expire December 28, 2015 or are redeemable for $0.01 per right by the Board under certain circumstances.

STOCKBASED_COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2014
Share-Based Compensation [Abstract]
STOCK-BASED COMPENSATION		9	STOCK-BASED COMPENSATION
	In May 2011, the Company adopted and shareholders approved the 2011 Omnibus Incentive Plan (the “Omnibus Plan”). This plan provides for the issuance of stock options, restricted stock, stock appreciation rights and performance units to directors, officers and other eligible employees of the Company. The Omnibus Plan makes available approximately 7.5 million shares for issuance, subject to adjustments for stock dividends, recapitalizations and the like.
	The Company recognizes all share-based awards to eligible employees based upon their fair value. The Company’s policy is to recognize expense for awards that have service conditions only subject to graded vesting using the straight-line attribution method. Total stock-based compensation expense was $7.8 million, $7.5 million and $5.1 million in 2014, 2013 and 2012, respectively. The amount of compensation costs related to nonvested stock options and restricted stock not yet recognized was $8.4 million at December 31, 2014, for which the weighted average remaining life was 1.7 years.
	Stock Options
	Stock options are awarded with an exercise price equal to the market price of the underlying stock on the date of grant, become fully exercisable three years after the date of grant and expire ten years after the date of grant. The fair value of stock option awards is estimated on the date of grant using a binomial option-pricing model that uses the assumptions noted in the following table:
	Valuation Assumptions			2014				2013			2012
	Risk-free interest rate			2.73	%			2.02	%		1.99	%
	Expected volatility			72	%			75.3	%		78.8	%
	Expected dividend yield			0	%			0	%		0	%
	Expected term			5 yrs.				5 yrs.			5 yrs.
	The expected volatility is based upon the Company’s historical experience. The expected term represents the period of time that options granted are expected to be outstanding. The risk-free interest rate utilized for periods throughout the contractual life of the options are based on U.S. Treasury security yields at the time of grant.
	A summary of all stock option activity during 2014 is as follows:
									Weighted
						Weighted			Average			Aggregate
						Average			Remaining			Intrinsic
			Number of			Exercise			Contractual			Value ($ in
			Options			Price			Life			millions)
	Options Outstanding at December 31, 2013			1,999,688		$	11.57			6	$	4.4
	Granted			200,720		$	13.32
	Exercised			-195,383		$	9.83				$	0.7
	Forfeited			-20,549		$	10.46
	Expired			-75,020		$	22.7
	Options Outstanding at December 31, 2014			1,909,456		$	11.79			5.5	$	3.3
	Options Exercisable at December 31, 2014			1,360,693		$	12.01			4.4	$	2.5
	During 2014, 2013 and 2012, the Company granted 200,720, 361,220, and 487,950 stock options with aggregate fair values on the date of grant of $1.7 million, $2.2 million and $3.4 million, respectively. The weighted average estimated fair value of the stock options granted in 2014, 2013 and 2012 were $8.34, $6.13 and $6.94 per stock option, respectively. The total intrinsic value of stock options exercised during 2014, 2013 and 2012 was $0.7 million, $0.3 million and $0.3 million, respectively.
	Restricted Stock
	Restricted stock awards vest over a period of one to three years and may be based on the achievement of specific financial performance metrics. These shares are valued at the market price on the date of grant, are forfeitable in the event of terminated employment prior to vesting and could include the right to vote and receive dividends.
	A summary of all restricted stock activity during 2014 is as follows:
						Weighted
						Average
			Number of			Grant Date
			Shares			Fair Value
	Restricted Stock Outstanding at December 31, 2013			1,146,931		$	10.06
	Granted			572,052		$	13.84
	Vested			-392,470		$	10.19
	Forfeited			-37,744		$	10.07
	Restricted Stock Outstanding at December 31, 2014			1,288,769		$	11.7
	During 2014, 2013 and 2012, the Company granted 572,052, 521,181 and 404,250 shares of restricted stock, respectively, with aggregate fair values on the date of grant of $7.9 million, $5.0 million and $4.0 million, respectively. The total fair value of restricted stock that vested during 2014, 2013 and 2012 was $5.2 million, $0.6 million and $1.9 million, respectively.
	Cash-Settled Performance Units and Stock Appreciation Rights
	In March 2010, the Company awarded eligible employees 326,250 cash-settled stock appreciation rights and 434,661 cash-settled performance units. The stock appreciation rights vested in March 2013 and provided each participant with the right to receive payment in cash representing the appreciation in the market value of the Company’s common stock from the grant date to the award’s vesting date. The per share exercise price of a stock appreciation right is equal to the closing market price of the Company’s stock on the date of grant. As of December 31, 2013, all stock appreciation rights awarded by the Company were fully vested. The total fair value of cash-settled stock appreciation rights that vested in 2013 was $0.8 million. The performance units vested in March 2013 and provided each participant with the right to receive payments in cash for the lesser of the market value of the Company’s stock on the date of grant or the vesting date. As of December 31, 2013, all cash-settled performance units awarded by the Company were fully vested. The total fair value of cash-settled performance units that vested in 2013 was $3.0 million. The number of performance units actually awarded to eligible employees was based on the achievement of specific financial performance metrics.

EMPLOYEE_SAVINGS_PLANS

EMPLOYEE SAVINGS PLANS	12 Months Ended
	Dec. 31, 2014
Employee Savings Plans [Abstract]
EMPLOYEE SAVINGS PLANS	10	EMPLOYEE SAVINGS PLANS
	Substantially all of the Company’s employees are eligible to participate in a defined contribution plan under Section 401(k) of the Internal Revenue Code. The Company also provides a non-qualified defined contribution plan for senior management and certain key employees. Both plans provide for the Company to match, in cash, a percentage of each employee’s contributions up to certain limits. The Company’s matching contribution and related expense for these plans was approximately $5.3 million, $4.4 million, and $3.1 million for 2014, 2013, and 2012, respectively.

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
INCOME TAXES	11	INCOME TAXES
		a.	Income Before Income Taxes
	The consolidated income before income taxes for 2014, 2013 and 2012 consists of the following (in thousands):
			2014		2013		2012
	Domestic		$	98,246	$	77,465	$	48,533
	Foreign			216		158		130
	Total income before income taxes		$	98,462	$	77,623	$	48,663
		b.	Income Tax Expense
	The consolidated income tax expense for 2014, 2013 and 2012 consists of the following components (in thousands):
			2014		2013		2012
	Current
	Federal		$	19,036	$	197	$	-
	State			1,805		717		174
	Foreign			118		130		141
			$	20,959	$	1,044	$	315
	Deferred
	Federal		$	12,913	$	26,753	$	-46,378
	State			3,778		3,412		-10,871
	Foreign			-118		-115		-34
			$	16,573	$	30,050	$	-57,283
	Total consolidated expense (benefit)		$	37,532	$	31,094	$	-56,968
	The Company’s following table provides a reconciliation of differences from the U.S. Federal statutory rate of 35% as follows (in thousands):
			2014		2013		2012
	Pretax book income		$	98,462	$	77,623	$	48,663
	Federal tax expense at 35% statutory rate			34,462		27,168		17,032
	State and local income taxes			4,808		3,870		2,619
	Foreign tax rate differential			-206		-41		-14
	Benefit of domestic production deduction			-2,010		-		-
	Reversal of income tax valuation allowance against net deferred tax assets			-		-		-59,887
	Utilization of valuation allowance for net operating losses and credit carrryforwards - U.S. and states			-132		-		-19,528
	Other			610		97		2,810
	Total income tax expense (benefit)		$	37,532	$	31,094	$	-56,968
		c.	Deferred Taxes
	The Company’s deferred income taxes are primarily due to temporary differences between financial and income tax reporting for the depreciation of property, plant and equipment, amortization of intangibles, compensation adjustments, inventory adjustments, other accrued liabilities and tax credits and losses carried forward.
	Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. During 2012, the Company utilized previously recognized net valuation allowances primarily due to accumulation of pretax income. Companies are required to assess whether valuation allowances should be established against their deferred tax assets based on the consideration of all available evidence, both positive and negative, using a “more likely than not” standard. In making such judgments, significant weight is given to evidence that can be objectively verified.
	The Company assesses, on a quarterly basis, the realizability of its deferred tax assets by evaluating all available evidence, both positive and negative, including: (1) the cumulative results of operations in recent years, (2) the nature of recent losses, (3) estimates of future taxable income, (4) the length of operating loss carryforward periods and (5) the uncertainty associated with a possible change in ownership, which imposes an annual limitation on the use of these carryforwards.
	By the end of 2012, management concluded that profitability in recent years and a business outlook showing continued profitability combined with a lengthy operating loss carryforward period, provided assurance that the future tax benefits more likely than not will be realized. Accordingly, during the fourth quarter of 2012, the Company released $59.9 million of valuation allowance against its net deferred tax assets, resulting in a benefit in the provision for income taxes. As of December 31, 2014 and 2013, the Company retained a valuation allowance of $1.3 and $1.4 million, respectively, against deferred tax assets related to various state and local operating loss carryforwards that are subject to restrictive rules for future utilization.
	As of December 31, 2014, the Company has no U.S. federal tax net operating loss carryforwards (“NOLs”). The Company has various multistate income tax net operating loss carryforwards, which have been recorded as a deferred income tax asset, of approximately $4 million, before valuation allowances. These net operating loss carryforwards will expire beginning in 2016, if unused.
	The components of deferred tax assets and deferred tax liabilities as of December 31, 2014 and 2013 were as follows (in thousands):
			2014		2013
	Deferred tax assets
	Tax credits and loss carryforwards		$	2,550	$	7,452
	Accrued liabilities			6,882		6,964
	Incentive compensation			17,171		16,621
	Other			5,551		4,736
			$	32,154	$	35,773
	Deferred tax liabilities
	Property, plant and equipment			-2,858		-295
	Intangibles			-5,565		-4,993
	Prepaid assets			-638		-690
	Convertible note discount			-5,117		-6,585
	Other			-2,025		-29
			$	-16,203	$	-12,592
	Net deferred tax asset before valuation allowances and reserves		$	15,951	$	23,181
	Valuation allowances			-1,307		-1,438
	Net deferred tax asset		$	14,644	$	21,743
		d.	Tax Reserves
	The Company’s policy with respect to interest and penalties associated with reserves or allowances for uncertain tax positions is to classify such interest and penalties in income tax expense in the Statements of Operations. As of December 31, 2014 and 2013, the total amount of unrecognized income tax benefits was approximately $11.0 million for each period, respectively, all of which, if recognized, would impact the effective income tax rate of the Company. As of December 31, 2014 and 2013, the Company had recorded a total of $0.3 and $0.4 million for each period respectively of accrued interest and penalties related to uncertain tax positions. The Company foresees no significant changes to the facts and circumstances underlying its reserves and allowances for uncertain income tax positions as reasonably possible during the next 12 months. As of December 31, 2014, the Company is subject to unexpired statutes of limitation for U.S. federal income taxes for the years 2002 through 2014. The Company is also subject to unexpired statutes of limitation for Indiana state income taxes for the years 2002 through 2014.
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands) and all balances as of December 31, 2014 are included in either Other Noncurrent Liabilities or Current Deferred Income Taxes in the Company’s Consolidated Balance Sheet:
	Balance at January 1, 2013		$	10,980
	Decrease in prior year tax positions			-9
	Balance at December 31, 2013		$	10,971
	Decrease in prior year tax positions			-323
	Balance at December 31, 2014		$	10,648

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	12	COMMITMENTS AND CONTINGENCIES
		a.	Litigation
	The Company is involved in a number of legal proceedings concerning matters arising in connection with the conduct of its business activities, and is periodically subject to governmental examinations (including by regulatory and tax authorities), and information gathering requests (collectively, "governmental examinations"). As of December 31, 2014, the Company was named as a defendant or was otherwise involved in numerous legal proceedings and governmental examinations in various jurisdictions, both in the United States and internationally.
	The Company has recorded liabilities for certain of its outstanding legal proceedings and governmental examinations. A liability is accrued when it is both (a) probable that a loss with respect to the legal proceeding has occurred and (b) the amount of loss can be reasonably estimated. The Company evaluates, on a quarterly basis, developments in legal proceedings and governmental examinations that could cause an increase or decrease in the amount of the liability that has been previously accrued. These legal proceedings, as well as governmental examinations, involve various lines of business of the Company and a variety of claims (including, but not limited to, common law tort, contract, antitrust and consumer protection claims), some of which present novel factual allegations and/or unique legal theories. While some matters pending against the Company specify the damages claimed by the plaintiff, many seek a not-yet-quantified amount of damages or are at very early stages of the legal process. Even when the amount of damages claimed against the Company are stated, the claimed amount may be exaggerated and/or unsupported. As a result, it is not currently possible to estimate a range of possible loss beyond previously accrued liabilities relating to some matters including those described below. Such previously accrued liabilities may not represent the Company's maximum loss exposure. The legal proceedings and governmental examinations underlying the estimated range will change from time to time and actual results may vary significantly from the currently accrued liabilities.
	Based on its current knowledge, and taking into consideration its litigation-related liabilities, the Company believes it is not a party to, nor is any of its properties the subject of, any pending legal proceeding or governmental examination other than the matters below, which are addressed individually, that would have a material adverse effect on the Company's consolidated financial condition or liquidity if determined in a manner adverse to the Company. However, in light of the uncertainties involved in such matters, the ultimate outcome of a particular matter could be material to the Company's operating results for a particular period depending on, among other factors, the size of the loss or liability imposed and the level of the Company's income for that period. Costs associated with the litigation and settlements of legal matters are reported within General and Administrative Expenses in the Consolidated Statements of Operations.
	Brazil Joint Venture
	In March 2001, Bernard Krone Indústria e Comércio de Máquinas Agrícolas Ltda. (“BK”) filed suit against the Company in the Fourth Civil Court of Curitiba in the State of Paraná, Brazil. Because of the bankruptcy of BK, this proceeding is now pending before the Second Civil Court of Bankruptcies and Creditors Reorganization of Curitiba, State of Paraná (No. 232/99).
	The case grows out of a joint venture agreement between BK and the Company related to marketing of RoadRailer trailers in Brazil and other areas of South America. When BK was placed into the Brazilian equivalent of bankruptcy late in 2000, the joint venture was dissolved. BK subsequently filed its lawsuit against the Company alleging that it was forced to terminate business with other companies because of the exclusivity and non-compete clauses purportedly found in the joint venture agreement. BK asserted damages, exclusive of any potentially court-imposed interest or inflation adjustments, of approximately R$20.8 million (Brazilian Reais). BK did not change the amount of damages it asserted following its filing of the case in 2001.
	A bench (non-jury) trial was held on March 30, 2010 in Curitiba, Paraná, Brazil. On November 22, 2011, the Fourth Civil Court of Curitiba partially granted BK’s claims, and ordered Wabash to pay BK lost profits, compensatory, economic and moral damages in excess of the amount of compensatory damages asserted by BK. The total ordered damages amount is approximately R$26.7 million (Brazilian Reais), which is approximately $10.0 million U.S. dollars using current exchange rates and exclusive of any potentially court-imposed interest, fees or inflation adjustments (which are currently estimated at a maximum of approximately $58 million, at current exchange rates, but may change with the passage of time and/or the discretion of the court at the time of final judgment in this matter). Due, in part, to the amount and type of damages awarded by the Fourth Civil Court of Curitiba, Wabash immediately filed for clarification of the judgment. The Fourth Civil Court has issued its clarification of judgment, leaving the underlying decision unchanged and referring the parties to the State of Paraná Court of Appeals for any further appeal of the decision. As such, Wabash filed its notice of appeal with the Court of Appeals, as well as its initial appeal papers, on April 22, 2013. The Court of Appeals has the authority to re-hear all facts presented to the lower court, as well as to reconsider the legal questions presented in the case, and to render a new judgment in the case without regard to the lower court’s findings. Pending outcome of this appeal process, the judgment is not enforceable by the plaintiff. Any ruling from the Court of Appeals is not expected before the second half of 2015, and, accordingly, the judgment rendered by the lower court cannot be enforced prior to that time, and may be overturned or reduced as a result of this process. The Company believes that the claims asserted by BK are without merit and it intends to continue to vigorously defend its position. The Company has not recorded a charge with respect to this loss contingency as of December 31, 2014. Furthermore, at this time, the Company does not have sufficient information to predict the ultimate outcome of the case and is unable to reasonably estimate the amount of any possible loss or range of loss that it may be required to pay at the conclusion of the case. The Company will reassess the need for the recognition of a loss contingency upon official assignment of the case in the Court of Appeals, upon a decision to settle this case with the plaintiffs or an internal decision as to an amount that the Company would be willing to settle or upon the outcome of the appeals process.
	Intellectual Property
	In October 2006, the Company filed a patent infringement suit against Vanguard National Corporation (“Vanguard”) regarding the Company’s U.S. Patent Nos. 6,986,546 and 6,220,651 in the U.S. District Court for the Northern District of Indiana (Civil Action No. 4:06-cv-135). The Company amended the Complaint in April 2007. In May 2007, Vanguard filed its Answer to the Amended Complaint, along with Counterclaims seeking findings of non-infringement, invalidity, and unenforceability of the subject patents. The Company filed a reply to Vanguard’s counterclaims in May 2007, denying any wrongdoing or merit to the allegations as set forth in the counterclaims. The case has currently been stayed by agreement of the parties while the U.S. Patent and Trademark Office (“Patent Office”) undertakes a reexamination of U.S. Patent Nos. 6,986,546. In June 2010, the Patent Office notified the Company that the reexamination is complete and the Patent Office has reissued U.S. Patent No. 6,986,546 without cancelling any claims of the patent. The parties have not yet petitioned the Court to lift the stay, and it is unknown at this time when the parties’ petition to lift the stay may be filed or granted.
	The Company believes that its claims against Vanguard have merit and that the claims asserted by Vanguard are without merit. The Company intends to vigorously defend its position and intellectual property. The Company believes that the resolution of this lawsuit will not have a material adverse effect on its financial position, liquidity or future results of operations. However, at this stage of the proceeding, no assurance can be given as to the ultimate outcome of the case.
	Walker Acquisition
	In connection with the Company’s acquisition of Walker in May 2012, there is an outstanding claim of approximately $2.9 million for unpaid benefits owed by the Seller that is currently in dispute and that is not expected to have a material adverse effect on the Company’s financial condition or results of operations.
	Environmental Disputes
	In August 2014, the Company was noticed as a potentially responsible party (“PRP”) by the South Carolina Department of Health and Environmental Control (“DHEC”) pertaining to the Philip Services Site located in Rock Hill, South Carolina pursuant to the Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”) and corresponding South Carolina statutes. PRPs include parties identified through manifest records as having contributed to deliveries of hazardous substances to the Philip Services Site between 1979 and 1999. The DHEC’s allegation that the Company was a PRP arises out of four manifest entries in 1989 under the name of a company unaffiliated with Wabash National (or any of its former or current subsidiaries) that purport to be delivering a de minimis amount of hazardous waste to the Philip Services Site “c/o Wabash National Corporation.” As such, the Philip Services Site PRP Group (“PRP Group”) notified Wabash in August 2014 that is was offering the Company the opportunity to resolve any liabilities associated with the Philip Services Site by entering into a Cash Out and Reopener Settlement Agreement (the “Settlement Agreement”) with the PRP Group, as well as a Consent Decree with the DHEC. The Company has accepted an offer from the PRP Group to enter into the Settlement Agreement and Consent Decree, while reserving its rights to contest its liability for any deliveries of hazardous materials to the Philips Services Site. The requested settlement payment is immaterial to the Company’s financial conditions or operations, and as a result, if the Settlement Agreement and Consent Decree are finalized, the agreement to become a party to them is not expected to have a material adverse effect on the Company’s financial condition or results of operations.
	Bulk Tank International, S. de R.L. de C.V. (“Bulk”), one of the companies acquired in the Walker Acquisition, entered into agreements in 2011 with the Mexican federal environmental agency, PROFEPA, and the applicable state environmental agency, PROPAEG, pursuant to PROFEPA’s and PROPAEG’s respective environmental audit programs to resolve noncompliance with federal and state environmental laws at Bulk’s Guanajuato facility. Bulk completed all required corrective actions and received a Certification of Clean Industry from PROPAEG, and is seeking the same certification from PROFEPA, which the Company expects it will receive following the conclusion of a final audit process that occurred in December 2014. As a result, the Company does not expect that this matter will have a material adverse effect on its financial condition or results of operations.
	In January 2012, the Company was noticed as a PRP by the U.S. Environmental Protection Agency (“EPA”) and the Louisiana Department of Environmental Quality (“LDEQ”) pertaining to the Marine Shale Processors Site located in Amelia, Louisiana (“MSP Site”) pursuant to CERCLA and corresponding Louisiana statutes. PRPs include current and former owners and operators of facilities at which hazardous substances were allegedly disposed. The EPA’s allegation that the Company is a PRP arises out of one alleged shipment of waste to the MSP Site in 1992 from the Company’s branch facility in Dallas, Texas. As such, the MSP Site PRP Group notified the Company in January 2012 that, as a result of a March 18, 2009 Cooperative Agreement for Site Investigation and Remediation entered into between the MSP Site PRP Group and the LDEQ, the Company was being offered a “De Minimis Cash-Out Settlement” to contribute to the remediation costs, which would remain open until February 29, 2012. The Company chose not to enter into the settlement and has denied any liability. In addition, the Company has requested that the MSP Site PRP Group remove the Company from the list of PRPs for the MSP Site, based upon the following facts: the Company acquired this branch facility in 1997 – five years after the alleged shipment - as part of the assets the Company acquired out of the Fruehauf Trailer Corporation (“Fruehauf”) bankruptcy (Case No. 96-1563, United States Bankruptcy Court, District of Delaware (“Bankruptcy Court”)); as part of the Asset Purchase Agreement regarding the Company’s purchase of assets from Fruehauf, the Company did not assume liability for “Off-Site Environmental Liabilities,” which are defined to include any environmental claims arising out of the treatment, storage, disposal or other disposition of any Hazardous Substance at any location other than any of the acquired locations/assets; the Bankruptcy Court, in an Order dated May 26, 1999, also provided that, except for those certain specified liabilities assumed by the Company under the terms of the Asset Purchase Agreement, the Company and its subsidiaries shall not be subject to claims asserting successor liability; and the “no successor liability” language of the Asset Purchase Agreement and the Bankruptcy Court Order form the basis for the Company’s request that it be removed from the list of PRPs for the MSP Site. The MSP Site PRP Group is currently considering the Company’s request, but has provided no timeline to the Company for a response. However, the MSP Site PRP Group has agreed to indefinitely extend the time period by which the Company must respond to the De Minimis Cash-Out Settlement offer. The Company does not expect that this proceeding will have a material adverse effect on its financial condition or results of operations.
	In September 2003, the Company was noticed as a PRP by the EPA pertaining to the Motorola 52nd Street, Phoenix, Arizona Superfund Site (the “Superfund Site”) pursuant to CERCLA. The EPA’s allegation that the Company was a PRP arises out of the Company’s acquisition of a former branch facility located approximately five miles from the original Superfund Site. The Company acquired this facility in 1997, operated the facility until 2000, and sold the facility to a third party in 2002. In June 2010, the Company was contacted by the Roosevelt Irrigation District (“RID”) informing it that the Arizona Department of Environmental Quality (“ADEQ”) had approved a remediation plan in excess of $100 million for the RID portion of the Superfund Site, and demanded that the Company contribute to the cost of the plan or be named as a defendant in a CERCLA action to be filed in July 2010. The Company initiated settlement discussions with the RID and the ADEQ in July 2010 to provide a full release from the RID, and a covenant not-to-sue and contribution protection regarding the former branch property from the ADEQ, in exchange for payment from the Company. If the settlement is approved by all parties, it will prevent any third party from successfully bringing claims against the Company for environmental contamination relating to this former branch property. The Company has been awaiting approval from the ADEQ since the settlement was first proposed in July 2010. Based on communications with the RID and ADEQ in December 2014, the Company does not expect to receive a response regarding the approval of the settlement from the ADEQ for, at least, several additional months. Based upon the Company’s limited period of ownership of the former branch property, and the fact that it no longer owns the former branch property, it does not anticipate that the ADEQ will reject the proposed settlement, but no assurance can be given at this time as to the ADEQ’s response to the settlement proposal. The proposed settlement terms have been accrued and did not have a material adverse effect on the Company’s financial condition or results of operations, and the Company believes that any ongoing proceedings will not have a material adverse effect on the Company’s financial condition or results of operations.
	In January 2006, the Company received a letter from the North Carolina Department of Environment and Natural Resources indicating that a site that the Company formerly owned near Charlotte, North Carolina has been included on the state's October 2005 Inactive Hazardous Waste Sites Priority List. The letter states that the Company was being notified in fulfillment of the state's “statutory duty” to notify those who own and those who at present are known to be responsible for each Site on the Priority List. Following receipt of this notice, no action has ever been requested from the Company, and since 2006 the Company has not received any further communications regarding this matter from the state of North Carolina. The Company does not expect that this designation will have a material adverse effect on its financial condition or results of operations.
		b.	Environmental Litigation Commitments and Contingencies
	The Company generates and handles certain material, wastes and emissions in the normal course of operations that are subject to various and evolving federal, state and local environmental laws and regulations.
	The Company assesses its environmental liabilities on an on-going basis by evaluating currently available facts, existing technology, presently enacted laws and regulations as well as experience in past treatment and remediation efforts. Based on these evaluations, the Company estimates a lower and upper range for treatment and remediation efforts and recognizes a liability for such probable costs based on the information available at the time. As of December 31, 2014, in addition to a reserve of $0.2 million relating to the ADEQ proposed settlement discussed above, the Company had reserved estimated remediation costs of $0.6 million for activities at existing and former properties which are recorded within Other Accrued Liabilities in the Consolidated Balance Sheet.
		c.	Letters of Credit
	As of December 31, 2014, the Company had standby letters of credit totaling $6.2 million issued in connection with workers compensation claims and surety bonds.
		d.	Purchase Commitments
	The Company has $71.3 million in purchase commitments through December 2015 for various raw material commodities, including aluminum, steel, nickel and copper as well as other raw material components which are within normal production requirements.

SEGMENTS_AND_RELATED_INFORMATI

SEGMENTS AND RELATED INFORMATION	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
SEGMENTS AND RELATED INFORMATION	13	SEGMENTS AND RELATED INFORMATION
		a.	Segment Reporting
	The Company manages its business in three segments: Commercial Trailer Products, Diversified Products and Retail. The Commercial Trailer Products segment produces and sells new trailers to the Retail segment and to customers who purchase trailers directly from the Company or through independent dealers. The Diversified Products segment focuses on the Company’s commitment to expand its customer base, diversify its product offerings and revenues and extend its market leadership by leveraging its proprietary DuraPlate® panel technology, drawing on its core manufacturing expertise and making available products that are complementary to truck and tank trailers and transportation equipment. The Retail segment includes the sale of new and used trailers, as well as the sale of after-market parts and service, through its retail branch network. In the fourth quarter of 2014, the Company’s wood flooring production business that manufactures laminated hard wood oak products primarily for the van trailer business was reclassified from the Diversified Products segment to the Company’s Commercial Trailer Products segment due to a change in how that business is managed internally as managment intends to drive improvements in the synergies between these two businesses. Financial performances for each of the Company’s reporting segments have been restated to reflect these changes.
	The accounting policies of the segments are the same as those described in the summary of significant accounting policies except that the Company evaluates segment performance based on income from operations. The Company has not allocated certain corporate related administrative costs, interest and income taxes included in the corporate and eliminations segment to the Company’s other reportable segment. The Company accounts for intersegment sales and transfers at cost plus a specified mark-up. The Company manages its assets and capital spending on a consolidated basis, not by operating segment, as the assets and capital spending of the Diversified Products segment are intermixed with those of the Commercial Trailer Products segment. Therefore, our chief operating decision maker does not review any asset or capital spending information by operating segment and, accordingly, we do not report asset or capital spending information by operating segment. Reportable segment information is as follows (in thousands):
			Commercial		Diversified				Corporate and
			Trailer Products		Products		Retail		Eliminations		Consolidated
	2014
	Net sales
	External customers		$	1,221,040	$	453,160	$	189,115	$	-	$	1,863,315
	Intersegment sales			73,124		13,078		965		-87,167	$	-
	Total net sales		$	1,294,164	$	466,238	$	190,080	$	-87,167	$	1,863,315
	Depreciation and amortization			11,332		23,806		2,061		1,630		38,829
	Income (Loss) from operations			81,141		54,879		3,785		-17,419		122,386
	Reconciling items to net income
	Interest expense											22,165
	Other, net											1,759
	Income tax expense											37,532
	Net income										$	60,930
	2013
	Net sales
	External customers		$	1,010,736	$	444,804	$	180,146	$	-	$	1,635,686
	Intersegment sales			71,718		13,871		1,340		-86,929	$	-
	Total net sales		$	1,082,454	$	458,675	$	181,486	$	-86,929	$	1,635,686
	Depreciation and amortization			11,127		23,320		2,029		1,860		38,336
	Income (Loss) from operations			57,543		59,126		2,885		-16,363		103,191
	Reconciling items to net income
	Interest expense											26,308
	Other, net											-740
	Income tax expense											31,094
	Net income										$	46,529
	2012
	Net sales
	External customers		$	995,164	$	309,680	$	157,010	$	-	$	1,461,854
	Intersegment sales			69,427		11,577		635		-81,639	$	-
	Total net sales		$	1,064,591	$	321,257	$	157,645	$	-81,639	$	1,461,854
	Depreciation and amortization			11,658		10,385		710		2,812		25,565
	Income (Loss) from operations			52,242		44,573		2,922		-29,253		70,484
	Reconciling items to net income
	Interest expense											21,724
	Other, net											97
	Income tax benefit											-56,968
	Net income										$	105,631
		b.	Customer Concentration
	The Company is subject to a concentration of risk as the five largest customers together accounted for approximately 20%, 17% and 23% of the Company’s aggregate net sales in 2014, 2013 and 2012, respectively. In addition, for each of the last three years there were no customers whose revenue individually represented 10% or more of our aggregate net sales. International sales, primarily to Canadian customers, accounted for less than 10% in each of the last three years.
		c.	Product Information
	The Company offers products primarily in four general categories: (1) new trailers, (2) used trailers, (3) components, parts and service and (4) equipment and other. The following table sets forth the major product categories and their percentage of consolidated net sales (dollars in thousands):
			Commercial		Diversified
	Year ended December 31,		Trailer Products		Products		Retail		Consolidated
	2014		$		$		$		$		%
	New trailers			1,177,402		227,382		89,041		1,493,825		80.2
	Used trailers			23,576		4,593		16,946		45,115		2.4
	Components, parts and service			3,077		87,942		79,570		170,589		9.2
	Equipment and other			16,985		133,243		3,558		153,786		8.2
	Total net external sales			1,221,040		453,160		189,115		1,863,315		100
			Commercial		Diversified
			Trailer Products		Products		Retail		Consolidated
	2013		$		$		$		$		%
	New trailers			959,116		204,812		82,995		1,246,923		76.2
	Used trailers			33,443		3,158		12,814		49,415		3
	Components, parts and service			7,387		92,869		80,070		180,326		11
	Equipment and other			10,790		143,965		4,267		159,022		9.8
	Total net external sales			1,010,736		444,804		180,146		1,635,686		100
			Commercial		Diversified
			Trailer Products		Products		Retail		Consolidated
2012		$		$		$		$		%
New trailers			959,094		131,236		73,524		1,163,854		79.6
Used trailers			23,534		1,887		14,762		40,183		2.7
Components, parts and service			2,323		64,145		65,279		131,747		9
Equipment and other			10,213		112,412		3,445		126,070		8.7
Total net external sales			995,164		309,680		157,010		1,461,854		100

CONSOLIDATED_QUARTERLY_FINANCI

CONSOLIDATED QUARTERLY FINANCIAL DATA	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
CONSOLIDATED QUARTERLY FINANCIAL DATA	14	CONSOLIDATED QUARTERLY FINANCIAL DATA (UNAUDITED)
	The following is a summary of the unaudited quarterly results of operations for fiscal years 2014, 2013 and 2012 (dollars in thousands, except per share amounts):
			First		Second		Third		Fourth
			Quarter		Quarter		Quarter		Quarter
	2014
	Net sales		$	358,120	$	486,021	$	491,697	$	527,477
	Gross profit			46,672		61,613		61,628		62,721
	Net income			7,296		16,239		18,307		19,088
	Basic net income per share			0.11		0.23		0.26		0.28
	Diluted net income per share(3)			0.1		0.23		0.25		0.27
	2013
	Net sales		$	324,229	$	413,126	$	439,977	$	458,354
	Gross profit			42,186		58,853		61,497		52,587
	Net income(1)			5,735		14,135		16,236		10,423
	Basic net income per share			0.08		0.2		0.24		0.15
	Diluted net income per share(3)			0.08		0.2		0.23		0.15
	2012
	Net sales		$	277,682	$	362,408	$	405,917	$	415,847
	Gross profit			19,729		39,681		50,074		54,339
	Net income(1)(2)			5,064		1,942		18,441		80,184
	Basic and diluted net income per share(3)			0.07		0.03		0.27		1.16
		-1	Net income includes pre-tax charges of $0.6 million, $0.2 million and less than $0.1 million for the first, second and third quarters of 2013, respectively, and $1.7 million, $13.6 million, $2.4 million and $0.5 million for the first, second, third and fourth quarters of 2012, respectively, in connection with acquisition related charges associated with the Company’s acquisition of Walker as well as the purchase of certain assets of Beall.
		-2	Net income for the fourth quarter of 2012 includes an income tax benefit of $59.0 million primarily related to the reversal of a U.S. valuation allowance against its deferred tax assets.
		-3	Basic and diluted net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income per share may differ from annual net income per share due to rounding.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Consolidation		a.	Basis of Consolidation
	The consolidated financial statements reflect the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All significant intercompany profits, transactions and balances have been eliminated in consolidation.
Use of Estimates		b.	Use of Estimates
	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that directly affect the amounts reported in its consolidated financial statements and accompanying notes. Actual results could differ from these estimates.
Revenue Recognition		c.	Revenue Recognition
	The Company recognizes revenue from the sale of its products when the customer has made a fixed commitment to purchase a product for a fixed or determinable price, collection is reasonably assured under the Company’s normal billing and credit terms and ownership and all risk of loss has been transferred to the buyer, which is normally upon shipment to or pick up by the customer. Revenues on certain long-term contracts are recorded on a percentage of completion method, measured by the actual labor incurred to the estimated total labor for each project. Revenues exclude all taxes collected from the customer. Shipping and handling fees are included in Net Sales and the associated costs included in Cost of Sales in the Consolidated Statements of Operations.
Used Trailer Trade Commitments and Residual Value Guarantees		d.	Used Trailer Trade Commitments and Residual Value Guarantees
	The Company has commitments with certain customers to accept used trailers on trade for new trailer purchases. These commitments arise in the normal course of business related to future new trailer orders at the time a new trailer order is placed by the customer. The Company acquired used trailers on trade of approximately $26.8 million, $26.2 million and $19.5 million in 2014, 2013 and 2012, respectively. As of December 31, 2014 and 2013, the Company had approximately $10.0 million and $15.6 million, respectively, of outstanding trade commitments. On occasion, the amount of the trade allowance provided for in the used trailer commitments, or cost, may exceed the net realizable value of the underlying used trailer. In these instances, the Company’s policy is to recognize the loss related to these commitments at the time the new trailer revenue is recognized. Net realizable value of used trailers is measured considering market sales data for comparable types of trailers. The net realizable value of the used trailers subject to the remaining outstanding trade commitments was estimated by the Company to be approximately $10.0 million and $15.3 million as of December 31, 2014 and 2013, respectively.
Cash and Cash Equivalents		e.	Cash and Cash Equivalents
	Cash and cash equivalents include all highly liquid investments with a maturity of three months or less at the time of purchase.
Accounts Receivable		f.	Accounts Receivable
	Accounts receivable are shown net of allowance for doubtful accounts and primarily include trade receivables. The Company records and maintains a provision for doubtful accounts for customers based upon a variety of factors including the Company’s historical collection experience, the length of time the account has been outstanding and the financial condition of the customer. If the circumstances related to specific customers were to change, the Company’s estimates with respect to the collectability of the related accounts could be further adjusted. The Company’s policy is to write-off receivables when they are determined to be uncollectible. Provisions to the allowance for doubtful accounts are charged to both General and Administrative Expenses and Selling Expenses in the Consolidated Statements of Operations. The following table presents the changes in the allowance for doubtful accounts (in thousands):
			Years Ended December 31,
			2014			2013			2012
	Balance at beginning of year		$	2,058		$	858		$	1,233
	Provision			178			908			-153
	Write-offs, net of recoveries			-1,189			292			-222
	Balance at end of year		$	1,047		$	2,058		$	858
Inventories		g.	Inventories
	Inventories are stated at the lower of cost, determined on the first-in, first-out (FIFO) method, or market. The cost of manufactured inventory includes raw material, labor and overhead. Inventories consist of the following (in thousands):
			December 31,
			2014			2013
	Raw materials and components		$	63,847		$	54,699
	Work in progress			23,145			20,749
	Finished goods			68,923			82,673
	Aftermarket parts			8,446			10,389
	Used trailers			12,783			15,663
			$	177,144		$	184,173
Prepaid Expenses and Other		h.	Prepaid Expenses and Other
	Prepaid expenses and other as of December 31, 2014 and 2013 were $10.2 million and $9.6 million, respectively. Prepaid expenses and other primarily includes items such as insurance premiums, maintenance agreements and other receivables. Insurance premiums and maintenance agreements are charged to expense over the contractual life, which is generally one year or less. Other receivables primarily consist of costs in excess of billings on long-term contracts for which the Company recognizes revenue on a percentage of completion basis.
Property, Plant and Equipment		i.	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost, net of accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while expenditures that extend the useful life of an asset are capitalized. Depreciation is recorded using the straight-line method over the estimated useful lives of the depreciable assets. The estimated useful lives are up to 33 years for buildings and building improvements and range from three to ten years for machinery and equipment. Depreciation expense, which is recorded in Cost of Sales and General and Administrative Expenses in the Consolidated Statements of Operations, as appropriate, on property, plant and equipment was $16.5 million, $15.7 million and $12.7 million in 2014, 2013 and 2012, respectively, and includes amortization of assets recorded in connection with the Company’s capital lease agreements. In connection with the purchase of certain assets of Beall in February 2013, the Company entered into a separate ten-year capital lease agreement for Beall’s manufacturing facility in Portland, Oregon, with an obligation totaling $4.3 million. As of December 31, 2014 and 2013, the assets related to the Company’s capital lease agreements are recorded within Property, Plant and Equipment in the Consolidated Balance Sheet for the amount of $10.2 million and $10.9 million, respectively, net of accumulated depreciation of $3.7 million and $2.4 million, respectively.
	Property, plant and equipment consist of the following (in thousands):
			December 31,
			2014			2013
	Land		$	25,982		$	26,398
	Buildings and building improvements			115,856			112,208
	Machinery and equipment			210,488			200,567
	Construction in progress			10,518			9,543
			$	362,844		$	348,716
	Less: accumulated depreciation			-219,952			-206,634
			$	142,892		$	142,082
Intangible Assets		j.	Intangible Assets
	As of December 31, 2014, the balances of intangible assets, other than goodwill, were as follows (in thousands):
			Weighted Average		Gross Intangible			Accumulated			Net Intangible
			Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks		20 years		$	39,222		$	-8,252		$	30,970
	Customer relationships		10 years			151,839			-58,534			93,305
	Technology		12 years			16,517			-3,692			12,825
	Total		12 years		$	207,578		$	-70,478		$	137,100
	As of December 31, 2013, the balances of intangible assets, other than goodwill, were as follows (in thousands):
			Weighted Average		Gross Intangible			Accumulated			Net Intangible
			Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks		20 years		$	39,222		$	-6,291		$	32,931
	Customer relationships		10 years			152,109			-40,112			111,997
	Technology		12 years			16,517			-2,264			14,253
	Total		12 years		$	207,848		$	-48,667		$	159,181
	Intangible asset amortization expense was $21.9 million, $21.8 million and $10.6 million for 2014, 2013 and 2012, respectively. Annual intangible asset amortization expense for the next 5 fiscal years is estimated to be $21.3 million in 2015; $20.1 million in 2016; $16.9 million in 2017; $15.5 million in 2018 and $14.6 million in 2019.
Goodwill		k.	Goodwill
	The changes in the carrying amounts of goodwill, all of which is included in the Company’s Diversified Products segment as of December 31, 2014, except for approximately $9.9 million allocated to the Company’s Retail segment, for the years ended December 31, 2014 and 2013 were as follows (in thousands):
	Balance as of December 31, 2012		$	146,444
	Goodwill acquired			1,784
	Walker acquisition adjustment			2,054
	Effects of foreign currency			-315
	Balance as of December 31, 2013		$	149,967
	Goodwill disposed			-500
	Effects of foreign currency			136
	Balance as of December 31, 2014		$	149,603
	Goodwill represents the excess purchase price over fair value of the net assets acquired. The Company reviews goodwill for impairment, at the reporting unit level, annually on October 1 and whenever events or changes in circumstances indicate its carrying value may not be recoverable. In accordance with ASC 350, Intangibles – Goodwill and Other, goodwill is reviewed for impairment utilizing either a qualitative assessment or a two-step quantitative process. The Company has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is unnecessary.
	For reporting units in which the Company performs a quantitative analysis, the first step compares the carrying value, including goodwill, of each reporting unit with its estimated fair value. If the fair value of the reporting unit exceeds its carrying value, the goodwill is not considered impaired. If the carrying value is greater than the fair value, this suggests that an impairment may exist and a second step is required in which the implied fair value of goodwill is calculated as the excess of the fair value of the reporting unit over the fair values assigned to its assets and liabilities. If this implied fair value is less than the carrying value, the difference is recognized as an impairment loss charged to the reporting unit. In assessing goodwill using this quantitative approach, the Company establishes fair value for the purpose of impairment testing by averaging the fair value using an income and market approach. The income approach employs a discounted cash flow model incorporating similar pricing concepts used to calculate fair value in an acquisition due diligence process and a discount rate that takes into account the Company’s estimated average cost of capital. The market approach employs market multiples based on comparable publicly traded companies in similar industries as the reporting unit. Estimates of fair value are established using current and forward multiples adjusted for size and performance of the reporting unit relative to peer companies.
	In assessing the qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, the Company assesses relevant events and circumstances that may impact the fair value and the carrying amount of the reporting unit. The identification of relevant events and circumstances and how these may impact a reporting unit's fair value or carrying amount involve significant judgments and assumptions. The judgments and assumptions include the identification of macroeconomic conditions, industry and market conditions, cost factors, overall financial performance and Company specific events and making the assessment on whether each relevant factor will impact the impairment test positively or negatively and the magnitude of any such impact.
	For 2014, the Company completed its goodwill impairment testing during the fourth quarter using the quantitative approach. For 2013 and 2012, the Company completed its testing using the qualitative assessment. Based on the testing performed in each of these years, the Company believes it is more likely than not that the fair value of its reporting units are greater than their carrying amount. As such, no impairment of goodwill was recognized in 2014, 2013 or 2012. Furthermore, in 2014, the Company’s Retail reporting unit recognized a partial disposal of goodwill in the amount of $0.5 million resulting from the transitioning of three Retail branch locations to independent dealer facilities during the second quarter of 2014.
Other Assets		l.	Other Assets
	The Company capitalizes the cost of computer software developed or obtained for internal use. Capitalized software is amortized using the straight-line method over three to seven years. As of December 31, 2014 and 2013, the Company had software costs, net of amortization, of $2.2 million and $0.2 million, respectively. Amortization expense for 2014, 2013 and 2012 was $0.5 million, $0.7 million and $2.3 million, respectively.
Long-Lived Assets		m.	Long-Lived Assets
	Long-lived assets, consisting primarily of intangible assets and property, plant and equipment, are reviewed for impairment whenever facts and circumstances indicate that the carrying amount may not be recoverable. Specifically, this process involves comparing an asset’s carrying value to the estimated undiscounted future cash flows the asset is expected to generate over its remaining life. If this process were to result in the conclusion that the carrying value of a long-lived asset would not be recoverable, a write-down of the asset to fair value would be recorded through a charge to operations. Fair value is determined based upon discounted cash flows or appraisals as appropriate.
Other Accrued Liabilities		n.	Other Accrued Liabilities
	The following table presents the major components of Other Accrued Liabilities (in thousands):
			December 31,
			2014			2013
	Payroll and related taxes		$	30,362		$	29,399
	Customer deposits			21,680			30,730
	Warranty			15,462			14,719
	Accrued taxes			8,371			8,520
	Self-insurance			7,543			9,419
	All other			5,272			6,571
			$	88,690		$	99,358
	The following table presents the changes in the product warranty accrual included in Other Accrued Liabilities (in thousands):
			2014			2013
	Balance as of January 1		$	14,719		$	14,886
	Provision for warranties issued in current year			7,058			6,269
	Recovery of pre-existing warranties			-296			-779
	Payments			-6,019			-5,657
	Balance as of December 31		$	15,462		$	14,719
	The Company offers a limited warranty for its products with a coverage period that ranges between one and five years, except that the coverage period for DuraPlate® trailer panels beginning with those panels manufactured in 2005 or after is ten years. The Company passes through component manufacturers’ warranties to our customers. The Company’s policy is to accrue the estimated cost of warranty coverage at the time of the sale.
	The following table presents the changes in the self-insurance accrual included in Other Accrued Liabilities (in thousands):
			Self-Insurance
			Accrual
	Balance as of January 1, 2013		$	7,711
	Expense			38,467
	Payments			-36,759
	Balance as of December 31, 2013		$	9,419
	Expense			35,555
	Payments			-37,431
	Balance as of December 31, 2014		$	7,543
	The Company is self-insured up to specified limits for medical and workers’ compensation coverage. The self-insurance reserves have been recorded to reflect the undiscounted estimated liabilities, including claims incurred but not reported, as well as catastrophic claims as appropriate.
Income Taxes		o.	Income Taxes
	The Company determines its provision or benefit for income taxes under the asset and liability method. The asset and liability method measures the expected tax impact at current enacted rates of future taxable income or deductions resulting from differences in the tax and financial reporting basis of assets and liabilities reflected in the Consolidated Balance Sheets. Future tax benefits of tax losses and credit carryforwards are recognized as deferred tax assets. Deferred tax assets are reduced by a valuation allowance to the extent management determines that it is more-likely-than-not the Company would not realize the value of these assets.
	The Company accounts for income tax contingencies by prescribing a “more-likely-than-not” recognition threshold that a tax position is required to meet before being recognized in the financial statements.
Concentration of Credit Risk		p.	Concentration of Credit Risk
	Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash, cash equivalents and customer receivables. We place our cash and cash equivalents with high quality financial institutions. Generally, we do not require collateral or other security to support customer receivables.
Research and Development		q.	Research and Development
	Research and development expenses are charged to earnings as incurred and were $1.7 million, $2.2 million and $1.7 million in 2014, 2013 and 2012, respectively.
New Accounting Pronouncements		r.	New Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2013-11, Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU requires an entity to present unrecognized tax benefits as a reduction to deferred tax assets when a net operating loss carryforward, similar tax loss or a tax credit carryforward exists, with limited exceptions. ASU 2013-11 became effective for fiscal years beginning on or after December 15, 2013, and for interim periods within those fiscal years. The adoption did not have a material effect on the Company’s audited consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) 605, Revenue Recognition. This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The effective date will be the first quarter of fiscal year 2017 using one of two retrospective application methods. The Company is currently assessing the potential impact of the adoption of ASU 2014-09 on its financial statements and related disclosures and has not yet decided on a transition method.
	In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern, which requires management to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and provide related footnote disclosures. The guidance is effective for annual and interim reporting periods beginning on or after December 15, 2016. Early adoption is permitted for financial statements that have not been previously issued. The standard allows for either a full retrospective or modified retrospective transition method. The Company does not expect this standard to have a material impact on the Company’s financial statements upon adoption.

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Changes in the Allowance for Doubtful Accounts	The following table presents the changes in the allowance for doubtful accounts (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	2,058		$	858		$	1,233
	Provision		178			908			-153
	Write-offs, net of recoveries		-1,189			292			-222
	Balance at end of year	$	1,047		$	2,058		$	858
Cost of Manufactured Inventory Includes Raw Material, Labor and Overhead	The cost of manufactured inventory includes raw material, labor and overhead. Inventories consist of the following (in thousands):
		December 31,
		2014			2013
	Raw materials and components	$	63,847		$	54,699
	Work in progress		23,145			20,749
	Finished goods		68,923			82,673
	Aftermarket parts		8,446			10,389
	Used trailers		12,783			15,663
		$	177,144		$	184,173
Property, Plant and Equipment	Property, plant and equipment consist of the following (in thousands):
		December 31,
		2014			2013
	Land	$	25,982		$	26,398
	Buildings and building improvements		115,856			112,208
	Machinery and equipment		210,488			200,567
	Construction in progress		10,518			9,543
		$	362,844		$	348,716
	Less: accumulated depreciation		-219,952			-206,634
		$	142,892		$	142,082
Schedule of Finite-Lived Intangible Assets	As of December 31, 2014, the balances of intangible assets, other than goodwill, were as follows (in thousands):
		Weighted Average		Gross Intangible			Accumulated			Net Intangible
		Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks	20 years		$	39,222		$	-8,252		$	30,970
	Customer relationships	10 years			151,839			-58,534			93,305
	Technology	12 years			16,517			-3,692			12,825
	Total	12 years		$	207,578		$	-70,478		$	137,100
	As of December 31, 2013, the balances of intangible assets, other than goodwill, were as follows (in thousands):
		Weighted Average		Gross Intangible			Accumulated			Net Intangible
		Amortization Period		Assets			Amortization			Assets
	Tradenames and trademarks	20 years		$	39,222		$	-6,291		$	32,931
	Customer relationships	10 years			152,109			-40,112			111,997
	Technology	12 years			16,517			-2,264			14,253
	Total	12 years		$	207,848		$	-48,667		$	159,181
Schedule of Goodwill	The changes in the carrying amounts of goodwill, all of which is included in the Company’s Diversified Products segment as of December 31, 2014, except for approximately $9.9 million allocated to the Company’s Retail segment, for the years ended December 31, 2014 and 2013 were as follows (in thousands):
	Balance as of December 31, 2012	$	146,444
	Goodwill acquired		1,784
	Walker acquisition adjustment		2,054
	Effects of foreign currency		-315
	Balance as of December 31, 2013	$	149,967
	Goodwill disposed		-500
	Effects of foreign currency		136
	Balance as of December 31, 2014	$	149,603
Major components of Other Accrued Liabilities	The following table presents the major components of Other Accrued Liabilities (in thousands):
		December 31,
		2014			2013
	Payroll and related taxes	$	30,362		$	29,399
	Customer deposits		21,680			30,730
	Warranty		15,462			14,719
	Accrued taxes		8,371			8,520
	Self-insurance		7,543			9,419
	All other		5,272			6,571
		$	88,690		$	99,358
Changes in the Product Warranty Accrual Included in Other Accrued Liabilities	The following table presents the changes in the product warranty accrual included in Other Accrued Liabilities (in thousands):
		2014			2013
	Balance as of January 1	$	14,719		$	14,886
	Provision for warranties issued in current year		7,058			6,269
	Recovery of pre-existing warranties		-296			-779
	Payments		-6,019			-5,657
	Balance as of December 31	$	15,462		$	14,719
Changes in the Self-Insurance Accrual Included in Other Accrued Liabilities	The following table presents the changes in the self-insurance accrual included in Other Accrued Liabilities (in thousands):
		Self-Insurance
		Accrual
	Balance as of January 1, 2013	$	7,711
	Expense		38,467
	Payments		-36,759
	Balance as of December 31, 2013	$	9,419
	Expense		35,555
	Payments		-37,431
	Balance as of December 31, 2014	$	7,543

ACQUISITION_Tables

ACQUISITION (Tables)	12 Months Ended
	Dec. 31, 2014
Purchase Price Allocation	The aggregate purchase price of $377.0 million was allocated to the opening balance sheet of Walker at May 8, 2012, the date of acquisition, as follows (in thousands):
	Cash	$	10,982
	Current assets		93,409
	Property, plant and equipment		32,541
	Intangibles		162,800
	Deferred income taxes		4,640
	Goodwill		148,498
	Total assets	$	452,870
	Current liabilities	$	-74,722
	Deferred income taxes		-1,100
	Total liabilities	$	-75,822
		$	377,048
	Acquisition, net of cash acquired	$	366,066
Intangible Assets	Intangible assets of $162.8 million were recorded as a result of the acquisition. The intangible assets consist of the following (in thousands):
		Amount		Useful Life
	Backlog	$	900	Less than 1 year
	Tradenames and Trademarks		27,600	20 years
	Technology		15,300	12 years
	Customer relationships		119,000	10 years
		$	162,800
Unaudited Pro Forma Information	The following unaudited pro forma information is shown below as if the acquisition of Walker had been completed as of the beginning of the earliest period presented (in thousands, except per share amounts):
		Twelve Months Ended
		December 31, 2012
	Sales	$	1,597,920
	Operating income	$	98,019
	Net income	$	123,030
	Basic net income per share	$	1.79
	Diluted net income per share	$	1.78
Beall Corporation [Member]
Purchase Price Allocation	The aggregate consideration paid by the Company for the acquired assets and the assumed liabilities was $13.9 million and was allocated to the opening balance sheet as follows (in thousands):
	Current assets	$	1,035
	Property, plant and equipment		2,714
	Intangibles		8,860
	Goodwill		1,784
	Total assets	$	14,393
	Current liabilities	$	-462
	Total liabilities	$	-462
	Acquisition	$	13,931
Intangible Assets	The intangible assets consist of the following (in thousands):
		Amount		Useful Life
	Tradenames and Trademarks	$	1,622	20 years
	Technology		1,217	8 years
	Customer relationships		6,021	8 years
		$	8,860

PER_SHARE_OF_COMMON_STOCK_Tabl

PER SHARE OF COMMON STOCK (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income (Loss) Per Share	The calculation of basic and diluted net income per share is determined using net income applicable to common stockholders as the numerator and the number of shares included in the denominator as follows (in thousands, except per share amounts):
		Years Ended December 31,
		2014		2013		2012
	Basic net income per share
	Net income applicable to common stockholders	$	60,930	$	46,529	$	105,631
	Undistributed earnings allocated to participating securities		-481		-457		-904
	Net income applicable to common stockholders excluding amounts applicable to participating securities	$	60,449	$	46,072	$	104,727
	Weighted average common shares outstanding		68,895		68,460		68,325
	Basic net income per share	$	0.88	$	0.67	$	1.53
	Diluted net income per share:
	Net income applicable to common stockholders	$	60,930	$	46,529	$	105,631
	Undistributed earnings allocated to participating securities		-481		-457		-904
	Net income applicable to common stockholders excluding amounts applicable to participating securities	$	60,449	$	46,072	$	104,727
	Weighted average common shares outstanding		68,895		68,460		68,325
	Dilutive shares from assumed conversion of convertible senior notes		1,354		63		-
	Dilutive stock options and restricted stock		814		558		239
	Diluted weighted average common shares outstanding		71,063		69,081		68,564
	Diluted net income per share	$	0.85	$	0.67	$	1.53

LEASE_ARRANGEMENTS_Tables

LEASE ARRANGEMENTS (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Future Minimum Lease Payments Required Under Lease Commitments	The Company leases office space, manufacturing, warehouse and service facilities and equipment for varying periods under both operating and capital lease agreements. Future minimum lease payments required under these lease commitments as of December 31, 2014 are as follows (in thousands):
		Capital		Operating
		Leases		Leases
	2015		1,728		2,422
	2016		1,416		1,948
	2017		1,071		1,312
	2018		926		834
	2019		834		523
	Thereafter		2,172		115
	Total minimum lease payments	$	8,147	$	7,154
	Interest		-893
	Present value of net minimum lease payments	$	7,254

DEBT_Tables

DEBT (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt	Long-term debt consists of the following (in thousands):
		December 31,
		2014		2013
	Convertible senior notes	$	150,000	$	150,000
	Term loan credit agreement		192,845		234,923
	Industrial revenue bond		1,645		2,119
		$	344,490	$	387,042
	Less: unamortized discount		-19,217		-24,907
	Less: current portion		-496		-3,245
		$	324,777	$	358,890
Maturities of Long-Term Debt	Maturities of long-term debt for the five years succeeding December 31, 2014 and thereafter are as follows (in thousands):
	2015		496
	2016		517
	2017		539
	2018		150,093
	2019		192,845
	Maturities of long-term debt	$	344,490
Equity and Liability Components of Notes	The following table summarizes information about the equity and liability components of the Notes (dollars in thousands). The fair value of the notes outstanding were measured based on quoted market prices.
		December 31,
		2014		2013
	Principal amount of convertible notes outstanding	$	150,000	$	150,000
	Unamortized discount of liability component		-15,399		-19,372
	Net carrying amount of liability component		134,601		130,628
	Less: current portion		-		-
	Long-term debt	$	134,601	$	130,628
	Carrying value of equity component, net of issuance costs	$	20,993	$	20,993
	Remaining amortization period of discount on the liability component		3.3 years		4.3 years
Contractual Coupon Interest Expense and Accretion Of Discount On Liability	Contractual coupon interest expense and accretion of discount on the liability component for the Note for the years ended December 31, 2014 and 2013 were as follow (in thousands):
		Years Ended December 31,
		2014		2013		2012
	Contractual coupon interest expense	$	5,063	$	5,063	$	3,488
	Accretion of discount on the liability component	$	3,973	$	3,710	$	2,411

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Accounted For at Fair Value on Recurring Basis	The Company’s carrying and estimated fair value of debt, at December 31, 2014 and 2013 were as follows:
		December 31, 2014								December 31, 2013
		Carrying		Fair Value						Carrying		Fair Value
		Value		Level 1		Level 2		Level 3		Value		Level 1		Level 2		Level 3
	Instrument
	Convertible senior notes	$	134,601	$	-	$	188,490	$	-	$	130,628	$	-	$	197,718	$	-
	Term loan credit agreement		189,027		-		192,845		-		229,388		-		236,684		-
	Industrial revenue bond		1,645		-		-		1,645		2,119		-		-		2,119
	Capital lease obligations		7,254		-		-		7,254		8,460		-		-		8,460
		$	332,527	$	-	$	381,335	$	8,899	$	370,595	$	-	$	434,402	$	10,579

STOCKBASED_COMPENSATION_Tables

STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2014
Class of Stock [Line Items]
Estimated On Date of Grant Binomial Option-Pricing Model	The fair value of stock option awards is estimated on the date of grant using a binomial option-pricing model that uses the assumptions noted in the following table:
	Valuation Assumptions		2014				2013			2012
	Risk-free interest rate		2.73	%			2.02	%		1.99	%
	Expected volatility		72	%			75.3	%		78.8	%
	Expected dividend yield		0	%			0	%		0	%
	Expected term		5 yrs.				5 yrs.			5 yrs.
Stock Option
Class of Stock [Line Items]
Summary of All Stock Option Activity	A summary of all stock option activity during 2014 is as follows:
								Weighted
					Weighted			Average			Aggregate
					Average			Remaining			Intrinsic
		Number of			Exercise			Contractual			Value ($ in
		Options			Price			Life			millions)
	Options Outstanding at December 31, 2013		1,999,688		$	11.57			6	$	4.4
	Granted		200,720		$	13.32
	Exercised		-195,383		$	9.83				$	0.7
	Forfeited		-20,549		$	10.46
	Expired		-75,020		$	22.7
	Options Outstanding at December 31, 2014		1,909,456		$	11.79			5.5	$	3.3
	Options Exercisable at December 31, 2014		1,360,693		$	12.01			4.4	$	2.5
Restricted Stock
Class of Stock [Line Items]
Summary of All Stock Option Activity	A summary of all restricted stock activity during 2014 is as follows:
					Weighted
					Average
		Number of			Grant Date
		Shares			Fair Value
	Restricted Stock Outstanding at December 31, 2013		1,146,931		$	10.06
	Granted		572,052		$	13.84
	Vested		-392,470		$	10.19
	Forfeited		-37,744		$	10.07
	Restricted Stock Outstanding at December 31, 2014		1,288,769		$	11.7

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Consolidated Income (loss) Before Income Taxes	The consolidated income before income taxes for 2014, 2013 and 2012 consists of the following (in thousands):
		2014		2013		2012
	Domestic	$	98,246	$	77,465	$	48,533
	Foreign		216		158		130
	Total income before income taxes	$	98,462	$	77,623	$	48,663
Consolidated Income Tax Expense (benefit)	The consolidated income tax expense for 2014, 2013 and 2012 consists of the following components (in thousands):
		2014		2013		2012
	Current
	Federal	$	19,036	$	197	$	-
	State		1,805		717		174
	Foreign		118		130		141
		$	20,959	$	1,044	$	315
	Deferred
	Federal	$	12,913	$	26,753	$	-46,378
	State		3,778		3,412		-10,871
	Foreign		-118		-115		-34
		$	16,573	$	30,050	$	-57,283
	Total consolidated expense (benefit)	$	37,532	$	31,094	$	-56,968
Reconciliation of Differences From The U.S. Federal Statutory Rate	The Company’s following table provides a reconciliation of differences from the U.S. Federal statutory rate of 35% as follows (in thousands):
		2014		2013		2012
	Pretax book income	$	98,462	$	77,623	$	48,663
	Federal tax expense at 35% statutory rate		34,462		27,168		17,032
	State and local income taxes		4,808		3,870		2,619
	Foreign tax rate differential		-206		-41		-14
	Benefit of domestic production deduction		-2,010		-		-
	Reversal of income tax valuation allowance against net deferred tax assets		-		-		-59,887
	Utilization of valuation allowance for net operating losses and credit carrryforwards - U.S. and states		-132		-		-19,528
	Other		610		97		2,810
	Total income tax expense (benefit)	$	37,532	$	31,094	$	-56,968
Components of Deferred Tax Assets and Deferred Tax Liabilities	The components of deferred tax assets and deferred tax liabilities as of December 31, 2014 and 2013 were as follows (in thousands):
		2014		2013
	Deferred tax assets
	Tax credits and loss carryforwards	$	2,550	$	7,452
	Accrued liabilities		6,882		6,964
	Incentive compensation		17,171		16,621
	Other		5,551		4,736
		$	32,154	$	35,773
	Deferred tax liabilities
	Property, plant and equipment		-2,858		-295
	Intangibles		-5,565		-4,993
	Prepaid assets		-638		-690
	Convertible note discount		-5,117		-6,585
	Other		-2,025		-29
		$	-16,203	$	-12,592
	Net deferred tax asset before valuation allowances and reserves	$	15,951	$	23,181
	Valuation allowances		-1,307		-1,438
	Net deferred tax asset	$	14,644	$	21,743
Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands) and all balances as of December 31, 2014 are included in either Other Noncurrent Liabilities or Current Deferred Income Taxes in the Company’s Consolidated Balance Sheet:
	Balance at January 1, 2013	$	10,980
	Decrease in prior year tax positions		-9
	Balance at December 31, 2013	$	10,971
	Decrease in prior year tax positions		-323
	Balance at December 31, 2014	$	10,648

SEGMENTS_AND_RELATED_INFORMATI1

SEGMENTS AND RELATED INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Company Accounts for Intersegment Sales and Transfers at Cost Plus a Specified Mark-up	Reportable segment information is as follows (in thousands):
		Commercial		Diversified				Corporate and
		Trailer Products		Products		Retail		Eliminations		Consolidated
	2014
	Net sales
	External customers	$	1,221,040	$	453,160	$	189,115	$	-	$	1,863,315
	Intersegment sales		73,124		13,078		965		-87,167	$	-
	Total net sales	$	1,294,164	$	466,238	$	190,080	$	-87,167	$	1,863,315
	Depreciation and amortization		11,332		23,806		2,061		1,630		38,829
	Income (Loss) from operations		81,141		54,879		3,785		-17,419		122,386
	Reconciling items to net income
	Interest expense										22,165
	Other, net										1,759
	Income tax expense										37,532
	Net income									$	60,930
	2013
	Net sales
	External customers	$	1,010,736	$	444,804	$	180,146	$	-	$	1,635,686
	Intersegment sales		71,718		13,871		1,340		-86,929	$	-
	Total net sales	$	1,082,454	$	458,675	$	181,486	$	-86,929	$	1,635,686
	Depreciation and amortization		11,127		23,320		2,029		1,860		38,336
	Income (Loss) from operations		57,543		59,126		2,885		-16,363		103,191
	Reconciling items to net income
	Interest expense										26,308
	Other, net										-740
	Income tax expense										31,094
	Net income									$	46,529
	2012
	Net sales
	External customers	$	995,164	$	309,680	$	157,010	$	-	$	1,461,854
	Intersegment sales		69,427		11,577		635		-81,639	$	-
	Total net sales	$	1,064,591	$	321,257	$	157,645	$	-81,639	$	1,461,854
	Depreciation and amortization		11,658		10,385		710		2,812		25,565
	Income (Loss) from operations		52,242		44,573		2,922		-29,253		70,484
	Reconciling items to net income
	Interest expense										21,724
	Other, net										97
	Income tax benefit										-56,968
	Net income									$	105,631
Major Product Categories and Their Percentage of Consolidated Net Sales	The following table sets forth the major product categories and their percentage of consolidated net sales (dollars in thousands):
		Commercial		Diversified
	Year ended December 31,	Trailer Products		Products		Retail		Consolidated
	2014	$		$		$		$		%
	New trailers		1,177,402		227,382		89,041		1,493,825		80.2
	Used trailers		23,576		4,593		16,946		45,115		2.4
	Components, parts and service		3,077		87,942		79,570		170,589		9.2
	Equipment and other		16,985		133,243		3,558		153,786		8.2
	Total net external sales		1,221,040		453,160		189,115		1,863,315		100
		Commercial		Diversified
		Trailer Products		Products		Retail		Consolidated
	2013	$		$		$		$		%
	New trailers		959,116		204,812		82,995		1,246,923		76.2
	Used trailers		33,443		3,158		12,814		49,415		3
	Components, parts and service		7,387		92,869		80,070		180,326		11
	Equipment and other		10,790		143,965		4,267		159,022		9.8
	Total net external sales		1,010,736		444,804		180,146		1,635,686		100
		Commercial		Diversified
		Trailer Products		Products		Retail		Consolidated
	2012	$		$		$		$		%
	New trailers		959,094		131,236		73,524		1,163,854		79.6
	Used trailers		23,534		1,887		14,762		40,183		2.7
	Components, parts and service		2,323		64,145		65,279		131,747		9
	Equipment and other		10,213		112,412		3,445		126,070		8.7
	Total net external sales		995,164		309,680		157,010		1,461,854		100

CONSOLIDATED_QUARTERLY_FINANCI1

CONSOLIDATED QUARTERLY FINANCIAL DATA (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Summary of the Unaudited Quarterly Results of Operations	The following is a summary of the unaudited quarterly results of operations for fiscal years 2014, 2013 and 2012 (dollars in thousands, except per share amounts):
			First		Second		Third		Fourth
			Quarter		Quarter		Quarter		Quarter
	2014
	Net sales		$	358,120	$	486,021	$	491,697	$	527,477
	Gross profit			46,672		61,613		61,628		62,721
	Net income			7,296		16,239		18,307		19,088
	Basic net income per share			0.11		0.23		0.26		0.28
	Diluted net income per share(3)			0.1		0.23		0.25		0.27
	2013
	Net sales		$	324,229	$	413,126	$	439,977	$	458,354
	Gross profit			42,186		58,853		61,497		52,587
	Net income(1)			5,735		14,135		16,236		10,423
	Basic net income per share			0.08		0.2		0.24		0.15
	Diluted net income per share(3)			0.08		0.2		0.23		0.15
	2012
	Net sales		$	277,682	$	362,408	$	405,917	$	415,847
	Gross profit			19,729		39,681		50,074		54,339
	Net income(1)(2)			5,064		1,942		18,441		80,184
	Basic and diluted net income per share(3)			0.07		0.03		0.27		1.16
		-1	Net income includes pre-tax charges of $0.6 million, $0.2 million and less than $0.1 million for the first, second and third quarters of 2013, respectively, and $1.7 million, $13.6 million, $2.4 million and $0.5 million for the first, second, third and fourth quarters of 2012, respectively, in connection with acquisition related charges associated with the Company’s acquisition of Walker as well as the purchase of certain assets of Beall.
		-2	Net income for the fourth quarter of 2012 includes an income tax benefit of $59.0 million primarily related to the reversal of a U.S. valuation allowance against its deferred tax assets.
		-3	Basic and diluted net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income per share may differ from annual net income per share due to rounding.

Recovered_Sheet1

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014
Accounting Policies [Line Items]
Prepaid Expense, Current	$10,200,000	$9,600,000
General And Administrative Expenses Cost Of Goods Sold Depreciation	16,500,000	15,700,000	12,700,000
Capital Leases, Balance Sheet, Assets by Major Class, Net	10,200,000	10,900,000
Amortization Of Intangible Assets	21,878,000	21,786,000	10,590,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation	4,300,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	3,700,000	2,400,000
Estimated amortization expense for 2015	21,300,000
Estimated amortization expense for 2016	20,100,000
Estimated amortization expense for 2017	16,900,000
Estimated amortization expense for 2018	15,500,000
Estimated amortization expense for 2019	14,600,000
Research and Development Expense	1,700,000	2,200,000	1,700,000
Capitalized Computer Software, Net	2,200,000	200,000
Capitalized Computer Software, Amortization	500,000	700,000	2,300,000
Retail
Accounting Policies [Line Items]
Disposal Group, Including Discontinued Operation, Goodwill				500,000
Goodwill, Period Increase (Decrease)	9,900,000	9,900,000
Used Trailers
Accounting Policies [Line Items]
Property, Plant and Equipment, Additions	26,800,000	26,200,000	19,500,000
Accounts Payable, Trade	10,000,000	15,600,000
Property Plant And Equipment Net Realizable Value	$10,000,000	$15,300,000
Building and Building Improvements
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	33 years
Machinery and Equipment | Maximum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Machinery and Equipment | Minimum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Software | Maximum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Software | Minimum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years

Changes_in_Allowance_for_Doubt

Changes in Allowance for Doubtful Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes In Allowance For Doubtful Accounts [Line Items]
Balance at beginning of year	$2,058	$858	$1,233
Provision	178	908	-153
Write-offs, net of recoveries	-1,189	292	-222
Balance at end of year	$1,047	$2,058	$858

Cost_of_Manufactured_Inventory

Cost of Manufactured Inventory Includes Raw Material, Labor and Overhead (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory [Line Items]
Raw materials and components	$63,847	$54,699
Work in progress	23,145	20,749
Finished goods	68,923	82,673
Aftermarket parts	8,446	10,389
Used trailers	12,783	15,663
Total, Inventories	$177,144	$184,173

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Land	$25,982	$26,398
Buildings and building improvements	115,856	112,208
Machinery and equipment	210,488	200,567
Construction in progress	10,518	9,543
Property, Plant and Equipment, Gross	362,844	348,716
Less: accumulated depreciation	-219,952	-206,634
Property, Plant and Equipment, Net	$142,892	$142,082

Balances_of_Intangible_Assets_

Balances of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Amortization Period	12 years	12 years
Gross Intangible Assets	$207,578	$207,848
Accumulated Amortization	-70,478	-48,667
Net Intangible Assets	137,100	159,181
Tradenames and trademarks
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Amortization Period	20 years	20 years
Gross Intangible Assets	39,222	39,222
Accumulated Amortization	-8,252	-6,291
Net Intangible Assets	30,970	32,931
Customer relationships
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Amortization Period	10 years	10 years
Gross Intangible Assets	151,839	152,109
Accumulated Amortization	-58,534	-40,112
Net Intangible Assets	93,305	111,997
Technology
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Amortization Period	12 years	12 years
Gross Intangible Assets	16,517	16,517
Accumulated Amortization	-3,692	-2,264
Net Intangible Assets	$12,825	$14,253

Carrying_Amounts_of_Goodwill_D

Carrying Amounts of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Beginning Balance	$149,967	$146,444
Goodwill acquired	-500	1,784
Goodwill, Purchase Accounting Adjustments		2,054
Effects of foreign currency	136	-315
Ending Balance	$149,603	$149,967

Major_Components_of_Other_Accr

Major Components of Other Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accrued Liabilities [Line Items]
Payroll and related taxes	$30,362	$29,399
Customer deposits	21,680	30,730
Warranty	15,462	14,719	14,886
Accrued taxes	8,371	8,520
Self-insurance	7,543	9,419	7,711
All other	5,272	6,571
Other accrued liabilities	$88,690	$99,358

Product_Warranty_Accrual_Inclu

Product Warranty Accrual Included in Other Accrued Liabilities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Accrued Liabilities [Line Items]
Balance as of January 1	$14,719	$14,886
Provision for warranties issued in current year	7,058	6,269
Recovery of pre-existing warranties	-296	-779
Payments	-6,019	-5,657
Balance as of December 31	$15,462	$14,719

SelfInsurance_Accrual_Included

Self-Insurance Accrual Included In Other Accrued Liabilities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Accrued Liabilities [Line Items]
Beginning Balance	$9,419	$7,711
Expense	35,555	38,467
Payments	-37,431	-36,759
Ending Balance	$7,543	$9,419

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	8-May-12	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 04, 2013
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$377,000,000
Intangible Assets Purchase Price Allocation		162,800,000
Business Acquisition, Pro Forma Revenue				1,597,920,000
Business Combination, Acquisition Related Costs		0	883,000	14,409,000
Walker Group Holdings LLC
Business Acquisition [Line Items]
Payments To Acquire Businesses Additional Payment	2,100,000
Business Acquisitions Pro Forma Income Before Income Taxes				34,400,000
Business Acquisition Purchases Price Allocation Intangible Assets Other Than Goodwill	162,800,000
Business Acquisition Purchases Price Allocation Goodwill Amount	148,498,000
Payments to Acquire Businesses, Gross	377,000,000
Intangible Assets Purchase Price Allocation	162,800,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount	148,500,000
Business Acquisition, Pro Forma Revenue				270,100,000
Business Combination, Acquisition Related Costs			900,000	14,400,000
Beall Corporation [Member]
Business Acquisition [Line Items]
Business acquisitions cost of acquired entity purchase price					13,900,000
Business Acquisition Purchases Price Allocation Capital Lease Obligation Accrual		4,700,000
Business Acquisition Purchases Price Allocation Intangible Assets Other Than Goodwill					8,900,000
Business Acquisition Purchases Price Allocation Goodwill Amount					1,800,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount					$1,784,000
Convertible Senior Notes | Walker Group Holdings LLC
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.38%
Debt Instrument Maturity Year	2018

Post_Closing_Purchase_Price_De

Post Closing Purchase Price (Detail) (USD $)	Feb. 04, 2013
In Thousands, unless otherwise specified
Business Combination Allocation Of Purchase Price [Line Items]
Intangibles	$8,860
Beall Corporation
Business Combination Allocation Of Purchase Price [Line Items]
Current assets	1,035
Property, plant and equipment	2,714
Intangibles	8,860
Goodwill	1,784
Total assets	14,393
Current liabilities	-462
Total liabilities	-462
Acquisition	$13,931

Purchase_of_Beall_Intangible_A

Purchase of Beall Intangible Assets (Detail) (USD $)	1 Months Ended
In Thousands, unless otherwise specified	Feb. 04, 2013
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	$8,860
Tradenames and Trademarks
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	1,622
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Technology
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	1,217
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Customer relationships
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible assets preliminarily, Amount	$6,021
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years

Purchase_Price_Allocation_Deta

Purchase Price Allocation (Detail) (Walker Group Holdings Llc [Member], USD $)	8-May-12
In Thousands, unless otherwise specified
Walker Group Holdings Llc [Member]
Business Combination Allocation Of Purchase Price [Line Items]
Cash	$10,982
Current assets	93,409
Property, plant and equipment	32,541
Intangibles	162,800
Deferred income taxes	4,640
Goodwill	148,498
Total assets	452,870
Current liabilities	-74,722
Deferred income taxes	-1,100
Total liabilities	-75,822
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net	377,048
Acquisition, net of cash acquired	$366,066

Intangible_Assets_Detail

Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets Purchase Price Allocation	$162,800
Trademarks and Trade Names [Member]
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets Purchase Price Allocation	27,600
Acquired Finite lived Intangible Asset Weighted Average Useful Lives	20 years
Technology-Based Intangible Assets [Member]
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets Purchase Price Allocation	15,300
Acquired Finite lived Intangible Asset Weighted Average Useful Lives	12 years
Customer Relationships [Member]
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets Purchase Price Allocation	119,000
Acquired Finite lived Intangible Asset Weighted Average Useful Lives	10 years
Order or Production Backlog [Member]
Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets Purchase Price Allocation	$900
Acquired Finite lived Intangible Asset Weighted Average Useful Lives	Less than 1 year

Unaudited_Pro_Forma_Informatio

Unaudited Pro Forma Information (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Sales	$1,597,920
Operating income	98,019
Net income	$123,030
Basic net income per share	$1.79
Diluted net income per share	$1.78

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Net Income Per Share (Detail) (USD $)	3 Months Ended																12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic net income per share
Net income applicable to common stockholders																	$60,930	$46,529	$105,631
Undistributed earnings allocated to participating securities																	-481	-457	-904
Net income applicable to common stockholders excluding amounts applicable to participating securities																	60,449	46,072	104,727
Weighted average common shares outstanding																	68,895	68,460	68,325
Basic net income per share	$0.28		$0.26		$0.23		$0.11		$0.15		$0.24		$0.20		$0.08		$0.88	$0.67	$1.53
Diluted net income per share:
Net income applicable to common stockholders																	60,930	46,529	105,631
Undistributed earnings allocated to participating securities																	-481	-457	-904
Net income applicable to common stockholders excluding amounts applicable to participating securities																	$60,449	$46,072	$104,727
Weighted average common shares outstanding																	68,895	68,460	68,325
Dilutive shares from assumed conversion of convertible senior notes																	1,354	63	0
Dilutive stock options and restricted stock																	814	558	239
Diluted weighted average common shares outstanding																	71,063	69,081	68,564
Diluted net income per share	$0.27	[1]	$0.25	[1]	$0.23	[1]	$0.10	[1]	$0.15	[1]	$0.23	[1]	$0.20	[1]	$0.08	[1]	$0.85	$0.67	$1.53
[1]	Basic and diluted net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income per share may differ from annual net income per share due to rounding.

Per_Share_Of_Common_Stock_Addi

Per Share Of Common Stock - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Disclosure [Line Items]
Average diluted shares outstanding	581	1,121	1,676
Debt Instrument, Convertible, Conversion Price			$11.70

Lease_Arrangements_Additional_

Lease Arrangements - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense, Net	$5.80	$4.60	$3.60
Capital Leases, Future Minimum Payments, Net Minimum Payments	$0.10

Future_Minimum_Lease_Payments_

Future Minimum Lease Payments Required Under These Lease Commitments (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Capital Leased Assets [Line Items]
Capital Leases 2015	$1,728
Capital Leases 2016	1,416
Capital Leases 2017	1,071
Capital Leases 2018	926
Capital Leases 2019	834
Capital Leases Thereafter	2,172
Capital Leases Total minimum lease payments	8,147
Interest	-893
Present value of net minimum lease payments	7,254
Operating Leases 2015	2,422
Operating Leases 2016	1,948
Operating Leases 2017	1,312
Operating Leases 2018	834
Operating Leases 2019	523
Operating Leases Thereafter	115
Operating Leases Total minimum lease payments	$7,154

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	8-May-12	Apr. 30, 2012	Apr. 30, 2013	Nov. 30, 2012
Debt Instrument [Line Items]
Long-term debt gross	$344,490,000	$387,042,000
Notes initial conversion price			$11.70
Proceeds from notes issued	0	0	292,500,000
Current portion of long-term debt	496,000	3,245,000
Debt issuance costs paid	0	981,000	5,134,000
Interest expense	22,165,000	26,308,000	21,724,000
Line of credit facility, decrease, repayments	806,000	1,166,000	271,015,000
Loan Agreement
Debt Instrument [Line Items]
Long-term debt gross							2,500,000
Notes issued, interest rate							4.25%
Long-term debt	1,600,000
Current portion of long-term debt	500,000
Convertible Senior Notes
Debt Instrument [Line Items]
Long-term debt gross	150,000,000
Convertible Senior Notes | Walker Group Holdings LLC
Debt Instrument [Line Items]
Notes issued, interest rate				3.38%
Debt Instrument Maturity Year				2018
Unsecured Debt | Convertible Senior Notes
Debt Instrument [Line Items]
Long-term debt gross					150,000,000
Notes issued, interest rate					3.38%
Notes issued, interest payment frequency					semi-annually
Notes initial conversion rate per 1,000 in principal amount	85.4372
Principal amount of notes conversation for 85.4372 shares of common stock	1,000
Notes initial conversion price	$11.70
Convertible notes, conversation date	1-Nov-17
Proceeds from notes issued	1,000
Estimated implied interest rate	7.00%
Fair value of liability component upon issuance	123,800,000
Difference between cash proceeds before offering expenses and the estimated fair value of liability component	21,700,000
Proceeds from issuance of convertible senior notes	145,500,000
Debt Conversion, Converted Instrument, Amount	8,000,000
Debt Instrument Maturity Year					2018
Unsecured Debt | Convertible Senior Notes | Walker Group Holdings LLC
Debt Instrument [Line Items]
Proceeds from issuance of convertible senior notes	145,100,000
Unsecured Debt | Convertible Senior Notes | Scenario 1
Debt Instrument [Line Items]
Number of consecutive trading days		30 days
Convertible senior notes, trading price per $1,000 principal amount of notes as percentage of the product of the last reported sale price of common stock and the conversion rate	98.00%
Amended Credit Agreement
Debt Instrument [Line Items]
Interest Paid	10,000,000	14,900,000	10,900,000
Debt issuance costs paid	8,500,000
Interest expense	900,000	900,000	600,000
Other Expenses	900,000	1,400,000
Amended Credit Agreement | Loan Agreement
Debt Instrument [Line Items]
Long-term debt gross	42,100,000	62,800,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	289,900,000
Revolving Credit Facility | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Credit facility, maturity date	8-May-17
Credit facility, borrowing capacity	150,000,000
Excess availability as a percentage of total revolving commitment below which minimum fixed charge coverage ratio maintained	12.50%
Availability percentage threshold of total revolving commitment below which amounts in deposit accounts will be transferred daily in to blocked account	15.00%
Line of Credit Facility, Amount Outstanding	25,000,000
Revolving Credit Facility | Amended and Restated Credit Agreement | Option to increase subject to certain conditions
Debt Instrument [Line Items]
Credit facility, borrowing capacity	200,000,000
Revolving Credit Facility | Amended and Restated Credit Agreement | Swing Line Loan
Debt Instrument [Line Items]
Credit facility, borrowing capacity	10,000,000
Term Loan Credit Facilty
Debt Instrument [Line Items]
Long-term debt gross	192,845,000	234,923,000
Notes issued, interest rate	4.50%
Credit facility, maturity date						8-May-19
Line of credit facility potential term extension period						91 days
Debt amortization percentage						1.00%
Proceeds from Sale of Productive Assets	1,000,000
Percentage of tranche loan amount on equal quarterly installments						0.25%
Term Loan Credit Facilty | Convertible Senior Notes
Debt Instrument [Line Items]
Notes issued, interest rate						3.38%
Term Loan Credit Facilty | Senior Secured Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding				300,000,000
Term Loan Credit Facilty | Incremental Senior Credit Facility
Debt Instrument [Line Items]
Credit facility, borrowing capacity				75,000,000
Term Loan Credit Facilty | Amended Credit Agreement
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity						297,000,000
Long-term debt						277,000,000
Line of credit facility, decrease, repayments						20,000,000
Term Loan Credit Facilty Libor
Debt Instrument [Line Items]
Credit facility, interest rate above basis						3.50%
Term Loan Credit Facilty Base Rate
Debt Instrument [Line Items]
Credit facility, interest rate above basis						2.50%
Letter Of Credit Subfacility | Revolving Credit Facility | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$15,000,000
Minimum | Unsecured Debt | Convertible Senior Notes | Scenario 1
Debt Instrument [Line Items]
Number of trading days	20 days
Last reported sale price of common stock as percentage of conversion price	130.00%
Minimum | Revolving Credit Facility | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Required minimum fixed charge coverage ratio when availability under the Revolver is less than 12.5% of the total revolving commitment	1
Minimum | Revolving Credit Facility | Amended and Restated Credit Agreement | LIBOR
Debt Instrument [Line Items]
Credit facility, interest rate above basis	1.75%
Minimum | Revolving Credit Facility | Amended and Restated Credit Agreement | Base Rate
Debt Instrument [Line Items]
Credit facility, interest rate above basis	0.75%
Minimum | Term Loan Credit Facilty | Through September 30, 2013
Debt Instrument [Line Items]
Senior leverage ratio	1
Minimum | Term Loan Credit Facilty | Thereafter through September 30, 2015
Debt Instrument [Line Items]
Senior leverage ratio	1
Minimum | Term Loan Credit Facilty | Thereafter
Debt Instrument [Line Items]
Senior leverage ratio	1
Maximum | Revolving Credit Facility | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Required minimum fixed charge coverage ratio when availability under the Revolver is less than 12.5% of the total revolving commitment	1.1
Maximum | Revolving Credit Facility | Amended and Restated Credit Agreement | LIBOR
Debt Instrument [Line Items]
Credit facility, interest rate above basis	2.25%
Maximum | Revolving Credit Facility | Amended and Restated Credit Agreement | Base Rate
Debt Instrument [Line Items]
Credit facility, interest rate above basis	1.25%
Maximum | Term Loan Credit Facilty | Through September 30, 2013
Debt Instrument [Line Items]
Senior leverage ratio	4.5
Maximum | Term Loan Credit Facilty | Thereafter through September 30, 2015
Debt Instrument [Line Items]
Senior leverage ratio	4
Maximum | Term Loan Credit Facilty | Thereafter
Debt Instrument [Line Items]
Senior leverage ratio	3.5

Components_of_Long_Term_Debt_D

Components of Long Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Long-term debt gross	$344,490	$387,042
Less: unamortized discount	-19,217	-24,907
Less: current portion	-496	-3,245
LONG-TERM DEBT	324,777	358,890
Term loan credit agreement
Debt Instrument [Line Items]
Long-term debt gross	192,845	234,923
Industrial revenue bond
Debt Instrument [Line Items]
Long-term debt gross	1,645	2,119
Convertible Senior Notes
Debt Instrument [Line Items]
Long-term debt gross	150,000	150,000
Less: unamortized discount	-15,399	-19,372
Less: current portion	0	0
LONG-TERM DEBT	$134,601	$130,628

Maturities_of_LongTerm_Debt_De

Maturities of Long-Term Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule Of Maturities Of Long Term Debt [Line Items]
2015	$496
2016	517
2017	539
2018	150,093
2019	192,845
Maturities of long-term debt	$344,490	$387,042

Equity_and_Liability_Component

Equity and Liability Components of Notes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt gross	$344,490	$387,042
Unamortized discount of liability component	-19,217	-24,907
Less: current portion	-496	-3,245
Long-term debt	324,777	358,890
Convertible Senior Notes
Debt Instrument [Line Items]
Long-term debt gross	150,000	150,000
Unamortized discount of liability component	-15,399	-19,372
Net carrying amount of liability component	134,601	130,628
Less: current portion	0	0
Long-term debt	134,601	130,628
Carrying value of equity component, net of issuance costs	$20,993	$20,993
Remaining amortization period of discount on the liability component	3 years 3 months 18 days	4 years 3 months 18 days

Contractual_Coupon_Interest_Ex

Contractual Coupon Interest Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Contractual coupon interest expense	$5,063	$5,063	$3,488
Accretion of discount on the liability component	$3,973	$3,710	$2,411

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	$0.40	$0.50
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	$7.40	$5.10

Financial_Assets_and_Liabiliti

Financial Assets and Liabilities Accounted For Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, carring amount	$332,527	$370,595
Convertible senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, carring amount	134,601	130,628
Term loan credit agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, carring amount	189,027	229,388
Industrial revenue bond
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, carring amount	1,645	2,119
Capital lease obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, carring amount	7,254	8,460
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 1 | Convertible senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 1 | Term loan credit agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 1 | Industrial revenue bond
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 1 | Capital lease obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	381,335	434,402
Fair Value, Inputs, Level 2 | Convertible senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	188,490	197,718
Fair Value, Inputs, Level 2 | Term loan credit agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	192,845	236,684
Fair Value, Inputs, Level 2 | Industrial revenue bond
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 2 | Capital lease obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	8,899	10,579
Fair Value, Inputs, Level 3 | Convertible senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 3 | Term loan credit agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Fair Value, Inputs, Level 3 | Industrial revenue bond
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	1,645	2,119
Fair Value, Inputs, Level 3 | Capital lease obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	$7,254	$8,460

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 18, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Common Stock, Shares Authorized		200,000,000	200,000,000
The number of authorized shares of common stock, par value		$0.01	$0.01
Business Acquisition Stockholders Rights Plan Exercise Description		The rights will be exercisable only if a person or a group acquires or announces a tender or exchange offer to acquire 20% or more of our common stock or if we enter into other business combination transactions not approved by our board of directors.
Business Acquisition Stockholders Rights Plan Expire Date		28-Dec-15
Business Acquisition Stockholders Rights Plan Redeemable Per Stock		$0
Stock Repurchased During Period, Value	$60
Series D Junior Participating Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share		$0
Stock Repurchased During Period, Shares		0
Business Acquisition, Share Price		$0
Preferred stock, shares issued			0	0
Preferred Stock, Shares Outstanding			0	0
Unclassified Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized		25,000,000

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2010	31-May-11
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$7,833,000	$7,480,000	$5,149,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months 12 days
Compensation costs related to stock options, nonvested restricted stock, stock appreciation rights and performance units not yet recognized	8,400,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award vesting period	10 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award vesting period	1 year
2011 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					7,500,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,909,456	1,999,688
Share based compensation arrangement by share based payment award options grants in period	200,720	361,220	487,950
Share based compensation arrangement by share based payment award options grant date fair value	1,700,000	2,200,000	3,400,000
Share based compensation arrangement by share based payment award options grants in period weighted average grant date fair value	$8.34	$6.13	$6.94
Exercised, Aggregate Intrinsic Value	700,000	300,000	300,000
Share based compensation arrangement by share based payment award vesting period	3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,288,769	1,146,931
Share based compensation arrangement by share based payment award options grants in period	572,052	521,181	404,250
Share based compensation arrangement by share based payment award options grant date fair value	7,900,000	5,000,000	4,000,000
Share based compensation arrangement by share based payment award option vested in period fair value	5,200,000	600,000	1,900,000
Share based compensation arrangement by share based payment award vesting period	3 years
Stock Appreciation Rights SARS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award options grants in period				326,250
Share based compensation arrangement by share based payment award option vested in period fair value	800,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement by share based payment award options grants in period				434,661
Share based compensation arrangement by share based payment award option vested in period fair value	$3,000,000

Fair_Value_of_Stock_Option_Awa

Fair Value of Stock Option Awards Using a Binomial Option-Pricing Model (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.73%	2.02%	1.99%
Expected volatility	72.00%	75.30%	78.80%
Expected dividend yield	0.00%	0.00%	0.00%
Expected term	5 years	5 years	5 years

Summary_of_All_Stock_Option_Ac

Summary of All Stock Option Activity (Detail) (Stock Options, USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding at December 31, 2013	1,999,688
Granted, Number of shares	200,720	361,220	487,950
Exercised, Number of Options	-195,383
Forfeited, Number of Options	-20,549
Expired, Number of Options	-75,020
Options Outstanding at December 31, 2014	1,909,456	1,999,688
Options Exercisable, Number of Options, at December 31, 2014	1,360,693
Options Outstanding at December 31, 2013	$11.57
Granted, Weighted Average Exercise Price	$13.32
Exercised, Weighted Average Exercise Price	$9.83
Forfeited, Weighted Average Exercise Price	$10.46
Expired, Weighted Average Exercise Price	$22.70
Options Outstanding at December 31, 2014	$11.79	$11.57
Options Exercisable,Weighted Average Exercise Price, at December 31, 2014	$12.01
Options Outstanding,Weighted Average Remaining Contractual Life	5 years 6 months	6 years
Options Exercisable, Weighted Average Remaining Contractual Life, at December 31, 2014	4 years 4 months 24 days
Options Outstanding at December 31, 2013	$4.40
Exercised, Aggregate Intrinsic Value	0.7	0.3	0.3
Options Outstanding at December 31, 2014	3.3	4.4
Options Exercisable at December 31, 2014	$2.50

Summary_of_All_Restricted_Stoc

Summary of All Restricted Stock Activity (Detail) (Restricted Stock, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding at December 31, 2013	1,146,931
Granted, Number of shares	572,052	521,181	404,250
Vested, Number of shares	-392,470
Forfeited, Number of shares	-37,744
Options Outstanding at December 31, 2014	1,288,769	1,146,931
Options Outstanding at December 31, 2013	$10.06
Granted, Weighted Average Grant Date Fair Value	$13.84
Vested, Weighted Average Grant Date Fair Value	$10.19
Forfeited, Weighted Average Grant Date Fair Value	$10.07
Options Outstanding at December 31, 2014	$11.70	$10.06

Employee_Savings_Plans_Additio

Employee Savings Plans - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Savings Plans [Line Items]
Labor and Related Expense	$5.30	$4.40	$3.10

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Owned, Federal Income Tax Note [Line Items]
Operating Loss Carryforwards, Valuation Allowance			$59,900,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	1,300,000	1,400,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	4,000,000
Unrecognized Tax Benefits	10,648,000	10,971,000	10,980,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$300,000	$400,000
Operating Loss Carryforward Expiration Dates	expire beginning in 2016, if unused
Us Federal
Investments, Owned, Federal Income Tax Note [Line Items]
Effective income tax rate reconciliation at federal statutory income tax rate	35.00%
Operating Loss Carryforward Expiration Dates	2002 through 2014.
Indiana State
Investments, Owned, Federal Income Tax Note [Line Items]
Operating Loss Carryforward Expiration Dates	2002 through 2014.

Consolidated_Income_loss_Befor

Consolidated Income (loss) Before Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
New Accounting Pronouncement, Early Adoption [Line Items]
Domestic	$98,246	$77,465	$48,533
Foreign	216	158	130
Total income before income taxes	$98,462	$77,623	$48,663

Consolidated_Income_Tax_Expens

Consolidated Income Tax Expense (benefit) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$19,036	$197	$0
State	1,805	717	174
Foreign	118	130	141
Current, Total	20,959	1,044	315
Deferred
Federal	12,913	26,753	-46,378
State	3,778	3,412	-10,871
Foreign	-118	-115	-34
Deferred, Total	16,573	30,089	-57,283
Total consolidated expense (benefit)	$37,532	$31,094	($56,968)

Reconciliation_of_Differences_

Reconciliation of Differences from U.S. Federal Statutory Rate (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Expenses [Line Items]
Pretax book income		$98,462	$77,623	$48,663
Federal tax expense at 35% statutory rate		34,462	27,168	17,032
State and local income taxes		4,808	3,870	2,619
Foreign tax rate differential		-206	-41	-14
Benefit of domestic production deduction		-2,010	0	0
Reversal of income tax valuation allowance against net deferred tax assets	-59,000	0	0	-59,887
Utilization of valuation allowance for net operating losses and credit carrryforwards - U.S. and states		-132	0	-19,528
Other		610	97	2,810
Total income tax expense (benefit)		$37,532	$31,094	($56,968)

Components_of_Deferred_Tax_Ass

Components of Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets
Tax credits and loss carryforwards	$2,550	$7,452
Accrued liabilities	6,882	6,964
Incentive compensation	17,171	16,621
Other	5,551	4,736
Deferred Tax Assets, Gross	32,154	35,773
Deferred tax liabilities
Property, plant and equipment	-2,858	-295
Intangibles	-5,565	-4,993
Prepaid assets	-638	-690
Convertible note discount	-5,117	-6,585
Other	-2,025	-29
Deferred tax liability	-16,203	-12,592
Net deferred tax asset before valuation allowances and reserves	15,951	23,181
Valuation allowances	-1,307	-1,438
Net deferred tax asset	$14,644	$21,743

Reconciliation_of_Beginning_an

Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Unrecognized Tax Benefits Income Tax Penalties And Interest Expenses [Line Items]
Balance	$10,971	$10,980
Decrease in prior year tax positions	-323	-9
Balance	$10,648	$10,971

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	12 Months Ended			1 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2010	Dec. 31, 2014	Dec. 31, 2014	31-May-12	Nov. 22, 2011	Nov. 22, 2011	Dec. 31, 2014	Dec. 31, 2014
	USD ($)	BRL	USD ($)	USD ($)	Court-Imposed Interest, Fees or Inflation Adjustments	Court-Imposed Interest, Fees or Inflation Adjustments	Arizona Department Of Environmental Quality	Standby Letters Of Credit
					Maximum	Maximum	USD ($)	USD ($)
					USD ($)	BRL
Loss Contingencies [Line Items]
Damages asserted by BK		20.8			$58		$0.20
Total ordered damages granted to Bk					10	26.7
Business combination, recognized identifiable assets acquired and liabilities assumed, contingent liability				2.9
Amount of remediation plan for the RID portion of the Superfund Site approved by ADEQ	100
Loss Contingency, Estimate of Possible Loss							0.6
Letters of Credit Outstanding, Amount								6.2
Purchase Obligation			$71.30

Recovered_Sheet2

Segments And Related Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	100.00%	100.00%	100.00%
Concentration Risk, Additional Characteristic	International sales, primarily to Canadian customers, accounted for less than 10% in each of the last three years.
Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	10.00%
Five Largest Customers
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	20.00%	17.00%	23.00%

Reportable_Segment_Information

Reportable Segment Information (Detail) (USD $)	3 Months Ended												12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net sales
Total net sales	$527,477	$491,697	$486,021	$358,120	$458,354	$439,977	$413,126	$324,229	$415,847	$405,917	$362,408	$277,682	$1,863,315	$1,635,686	$1,461,854
Depreciation and amortization													38,829	38,336	25,565
Income (Loss) from operations													122,386	103,191	70,484
Reconciling items to net income
Interest expense													-22,165	-26,308	-21,724
Other, net													-1,759	740	-97
Income tax expense													37,532	31,094	-56,968
Net income													98,462	77,623	48,663
External customers
Net sales
Total net sales													1,863,315	1,635,686	1,461,854
Intersegment sales
Net sales
Total net sales													0	0	0
Corporate and Eliminations
Net sales
Total net sales													-87,167	-86,929	-81,639
Depreciation and amortization													1,630	1,860	2,812
Income (Loss) from operations													-17,419	-16,363	-29,253
Corporate and Eliminations | External customers
Net sales
Total net sales													0	0	0
Corporate and Eliminations | Intersegment sales
Net sales
Total net sales													-87,167	-86,929	-81,639
Commercial Trailer Products
Net sales
Total net sales													1,294,164	1,082,454	1,064,591
Depreciation and amortization													11,332	11,127	11,658
Income (Loss) from operations													81,141	57,543	52,242
Commercial Trailer Products | External customers
Net sales
Total net sales													1,221,040	1,010,736	995,164
Commercial Trailer Products | Intersegment sales
Net sales
Total net sales													73,124	71,718	69,427
Diversified Products
Net sales
Total net sales													466,238	458,675	321,257
Depreciation and amortization													23,806	23,320	10,385
Income (Loss) from operations													54,879	59,126	44,573
Diversified Products | External customers
Net sales
Total net sales													453,160	444,804	309,680
Diversified Products | Intersegment sales
Net sales
Total net sales													13,078	13,871	11,577
Retail
Net sales
Total net sales													190,080	181,486	157,645
Depreciation and amortization													2,061	2,029	710
Income (Loss) from operations													3,785	2,885	2,922
Retail | External customers
Net sales
Total net sales													189,115	180,146	157,010
Retail | Intersegment sales
Net sales
Total net sales													$965	$1,340	$635

Major_Product_Categories_and_P

Major Product Categories and Percentage of Consolidated Net Sales (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Product Information [Line Items]
Net external sales	$1,863,315	$1,635,686	$1,461,854
Percentage of consolidated net sales	100.00%	100.00%	100.00%
Commercial Trailer Products
Product Information [Line Items]
Net external sales	1,221,040	1,010,736	995,164
Diversified Products
Product Information [Line Items]
Net external sales	453,160	444,804	309,680
Retail
Product Information [Line Items]
Net external sales	189,115	180,146	157,010
New Trailers
Product Information [Line Items]
Net external sales	1,493,825	1,246,923	1,163,854
Percentage of consolidated net sales	80.20%	76.20%	79.60%
New Trailers | Commercial Trailer Products
Product Information [Line Items]
Net external sales	1,177,402	959,116	959,094
New Trailers | Diversified Products
Product Information [Line Items]
Net external sales	227,382	204,812	131,236
New Trailers | Retail
Product Information [Line Items]
Net external sales	89,041	82,995	73,524
Used Trailers
Product Information [Line Items]
Net external sales	45,115	49,415	40,183
Percentage of consolidated net sales	2.40%	3.00%	2.70%
Used Trailers | Commercial Trailer Products
Product Information [Line Items]
Net external sales	23,576	33,443	23,534
Used Trailers | Diversified Products
Product Information [Line Items]
Net external sales	4,593	3,158	1,887
Used Trailers | Retail
Product Information [Line Items]
Net external sales	16,946	12,814	14,762
Components, parts and service
Product Information [Line Items]
Net external sales	170,589	180,326	131,747
Percentage of consolidated net sales	9.20%	11.00%	9.00%
Components, parts and service | Commercial Trailer Products
Product Information [Line Items]
Net external sales	3,077	7,387	2,323
Components, parts and service | Diversified Products
Product Information [Line Items]
Net external sales	87,942	92,869	64,145
Components, parts and service | Retail
Product Information [Line Items]
Net external sales	79,570	80,070	65,279
Equipment and other
Product Information [Line Items]
Net external sales	153,786	159,022	126,070
Percentage of consolidated net sales	8.20%	9.80%	8.70%
Equipment and other | Commercial Trailer Products
Product Information [Line Items]
Net external sales	16,985	10,790	10,213
Equipment and other | Diversified Products
Product Information [Line Items]
Net external sales	133,243	143,965	112,412
Equipment and other | Retail
Product Information [Line Items]
Net external sales	$3,558	$4,267	$3,445

Recovered_Sheet3

Consolidated Quarterly Financial Data - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Schedule of Quarterly Financial Information [Line Items]
Business Acquisition, Transaction Costs	$500,000			$500,000	$100,000	$200,000	$600,000	$2,400,000	$13,600,000	$1,700,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$59,000,000	$0	$0	$59,887,000

Summary_of_the_Unaudited_Quart

Summary of the Unaudited Quarterly Results of Operations (Detail) (USD $)	3 Months Ended																								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Quarterly Financial Information [Line Items]
Net sales	$527,477		$491,697		$486,021		$358,120		$458,354		$439,977		$413,126		$324,229		$415,847		$405,917		$362,408		$277,682		$1,863,315	$1,635,686	$1,461,854
Gross profit	62,721		61,628		61,613		46,672		52,587		61,497		58,853		42,186		54,339		50,074		39,681		19,729		232,634	215,123	163,823
Net Income	$19,088		$18,307		$16,239		$7,296		$10,423	[1]	$16,236	[1]	$14,135	[1]	$5,735	[1]	$80,184	[1],[2]	$18,441	[1],[2]	$1,942	[1],[2]	$5,064	[1],[2]	$60,930	$46,529	$105,631
Basic net income per share	$0.28		$0.26		$0.23		$0.11		$0.15		$0.24		$0.20		$0.08										$0.88	$0.67	$1.53
Diluted net income per share	$0.27	[3]	$0.25	[3]	$0.23	[3]	$0.10	[3]	$0.15	[3]	$0.23	[3]	$0.20	[3]	$0.08	[3]									$0.85	$0.67	$1.53
Basic and diluted net income per share																	$1.16	[3]	$0.27	[3]	$0.03	[3]	$0.07	[3]
[1]	Net income includes pre-tax charges of $0.6 million, $0.2 million and less than $0.1 million for the first, second and third quarters of 2013, respectively, and $1.7 million, $13.6 million, $2.4 million and $0.5 million for the first, second, third and fourth quarters of 2012, respectively, in connection with acquisition related charges associated with the Companybs acquisition of Walker as well as the purchase of certain assets of Beall.
[2]	Net income for the fourth quarter of 2012 includes an income tax benefit of $59.0 million primarily related to the reversal of a U.S. valuation allowance against its deferred tax assets.
[3]	Basic and diluted net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income per share may differ from annual net income per share due to rounding.