LCI Industries (LCII) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Entity Registrant Name	LCI INDUSTRIES
Entity Central Index Key	763,744
Trading Symbol	LCII
Entity Filer Category	Large Accelerated Filer
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		25,213,242

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 650,492	$ 498,336
Cost of sales	509,759	374,322
Gross profit	140,733	124,014
Selling, general and administrative expenses	80,913	64,885
Operating profit	59,820	59,129
Interest expense, net	1,101	437
Income before income taxes	58,719	58,692
Provision for income taxes	11,383	15,547
Net income	$ 47,336	$ 43,145
Net income per common share:
Basic (in usd per share)	$ 1.88	$ 1.73
Diluted (in usd per share)	$ 1.86	$ 1.71
Weighted average common shares outstanding:
Basic (in shares)	25,149	24,906
Diluted (in shares)	25,465	25,255

Condensed Consolidated Stateme3

Condensed Consolidated Statement Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 47,336	$ 43,145
Other comprehensive income:
Net foreign currency translation adjustment	1,110	349
Total comprehensive income	$ 48,446	$ 43,494

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Current assets
Cash and cash equivalents	$ 4,993	$ 26,049	$ 64,381
Accounts receivable, net of allowances of $2,470, $2,054, and $1,536 at March 31, 2018, March 31, 2017, and December 31, 2017, respectively	178,337	82,157	131,108
Inventories, net	323,945	274,748	189,020
Prepaid expenses and other current assets	37,802	34,125	37,456
Total current assets	545,077	417,079	421,965
Fixed assets, net	266,596	228,950	178,922
Goodwill	147,291	124,183	98,105
Other intangible assets, net	180,691	130,132	114,311
Deferred taxes	17,115	24,156	26,882
Other assets	22,120	21,358	12,616
Total assets	1,178,890	945,858	852,801
Current liabilities
Accounts payable, trade	97,606	79,164	70,225
Accrued expenses and other current liabilities	109,818	102,849	101,020
Total current liabilities	207,424	182,013	171,245
Long-term indebtedness	226,242	49,924	49,905
Other long-term liabilities	66,433	61,176	47,171
Total liabilities	500,099	293,113	268,321
Stockholders’ equity
Common stock, par value $.01 per share	279	277	276
Paid-in capital	195,765	203,990	189,536
Retained earnings	508,665	475,506	425,584
Accumulated other comprehensive income (loss)	3,549	2,439	(1,449)
Stockholders’ equity before treasury stock	708,258	682,212	613,947
Treasury stock, at cost	(29,467)	(29,467)	(29,467)
Total stockholders’ equity	678,791	652,745	584,480
Total liabilities and stockholders’ equity	$ 1,178,890	$ 945,858	$ 852,801

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 2,470	$ 1,536	$ 2,054
Common stock, par value	$ 0.01	$ 0.01	$ 0.01

Condensed Consolidated Stateme6

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 47,336	$ 43,145
Adjustments to reconcile net income to cash flows provided by (used in) operating activities:
Depreciation and amortization	15,275	12,241
Stock-based compensation expense	5,543	3,902
Other non-cash items	(1,127)	1,139
Changes in assets and liabilities, net of acquisitions of businesses:
Accounts receivable, net	(71,073)	(71,155)
Inventories, net	(17,232)	1,847
Prepaid expenses and other assets	(3,185)	(2,181)
Accounts payable, trade	8,114	18,146
Accrued expenses and other liabilities	11,246	14,627
Net cash flows provided by (used in) operating activities	(5,103)	21,711
Cash flows from investing activities:
Capital expenditures	(26,004)	(12,020)
Acquisitions of businesses, net of cash acquired	(138,570)	(10,689)
Proceeds from sales of fixed assets	155	119
Other investing activities	(35)	80
Net cash flows used in investing activities	(164,454)	(22,510)
Cash flows from financing activities:
Exercise of stock-based awards, net of shares tendered for payment of taxes	(14,085)	(7,650)
Proceeds from line of credit borrowings	474,000	0
Repayments under line of credit borrowings	(297,000)	0
Payment of dividends	13,858	12,442
Payment of contingent consideration related to acquisitions	0	(839)
Other financing activities	(556)	(59)
Net cash flows provided by (used in) financing activities	148,501	(20,990)
Net decrease in cash and cash equivalents	(21,056)	(21,789)
Cash and cash equivalents at beginning of period	26,049	86,170
Cash and cash equivalents at end of period	4,993	64,381
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	1,012	483
Cash paid during the period for income taxes, net of refunds	(11)	2,072
Purchase of property and equipment in accrued expenses	$ 3,711	$ 2,212

Condensed Consolidated Stateme7

Condensed Consolidated Statement Of Stockholders' Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance at Dec. 31, 2017	$ 652,745	$ 277	$ 203,990	$ 475,506	$ 2,439	$ (29,467)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,336			47,336
Issuance of 223,768 shares of common stock pursuant to stock-based awards, net of shares tendered for payment of taxes	(14,085)	2	(14,087)
Stock-based compensation expense	5,543		5,543
Other comprehensive income					1,110
Cash dividends ($0.55 per share)	(13,858)			(13,858)
Dividend equivalents on stock-based awards			319	(319)
Ending balance at Mar. 31, 2018	$ 678,791	$ 279	$ 195,765	$ 508,665	$ 3,549	$ (29,467)

Condensed Consolidated Stateme8

Condensed Consolidated Statement Of Stockholders' Equity (Parenthetical)	3 Months Ended
	Mar. 31, 2018$ / sharesshares
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares) | shares	223,768
Special cash dividend (in usd per share) | $ / shares	$ 0.55

Basis Of Presentation

Basis Of Presentation	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis Of Presentation	BASIS OF PRESENTATION The Condensed Consolidated Financial Statements include the accounts of LCI Industries and its wholly-owned subsidiaries (“LCII” and collectively with its subsidiaries, the “Company”). LCII has no unconsolidated subsidiaries. LCII, through its wholly-owned subsidiary, Lippert Components, Inc. and its subsidiaries (collectively, “Lippert Components” or “LCI”), supplies, domestically and internationally, a broad array of components for the leading original equipment manufacturers (“OEMs”) of recreational vehicles (“RVs”) and adjacent industries including buses; trailers used to haul boats, livestock, equipment and other cargo; trucks; boats; trains; manufactured homes; and modular housing . The Company also supplies components to the related aftermarkets of these industries, primarily by selling to retail dealers, wholesale distributors and service centers. At March 31, 2018 , the Company operated over 65 manufacturing and distribution facilities located throughout the United States and in Canada, Ireland, Italy, and the United Kingdom . Most industries where the Company sells products or where its products are used historically have been seasonal and are generally at the highest levels when the weather is moderate. Accordingly, the Company’s sales and profits have generally been the highest in the second quarter and lowest in the fourth quarter. However, because of fluctuations in dealer inventories, the impact of international, national and regional economic conditions and consumer confidence on retail sales of RVs and other products for which the Company sells its components, the timing of dealer orders, and the impact of severe weather conditions on the timing of industry-wide shipments from time to time, current and future seasonal industry trends may be different than in prior years. Additionally, sales of components to the aftermarket channels of these industries tend to be counter-seasonal. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to product returns, sales and purchase rebates, accounts receivable, inventories, goodwill and other intangible assets, net assets of acquired businesses, income taxes, warranty and product recall obligations, self-insurance obligations, lease terminations, asset retirement obligations, long-lived assets, post-retirement benefits, stock-based compensation, segment allocations, contingent consideration, environmental liabilities, contingencies and litigation. The Company bases its estimates on historical experience, other available information and various other assumptions believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities not readily apparent from other resources. Actual results and events could differ significantly from management estimates. In the opinion of management, the information furnished in this Form 10-Q reflects all adjustments necessary for a fair statement of the financial position and results of operations for the interim periods presented. The Condensed Consolidated Financial Statements have been prepared in accordance with the instructions to Form 10-Q, and therefore do not include some information necessary to conform to annual reporting requirements.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	The Condensed Consolidated Financial Statements presented herein have been prepared by the Company in accordance with the accounting policies described in its December 31, 2017 Annual Report on Form 10-K and should be read in conjunction with the Notes to Consolidated Financial Statements which appear in that report. All significant intercompany balances and transactions have been eliminated. Certain prior year balances have been reclassified to conform to current year presentation. Recent Accounting Pronouncements Recently issued accounting pronouncements not yet adopted In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, Targeted Improvements to Accounting for Hedging Activities, which amends ASC 815, Derivatives and Hedging. This ASU better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company does not expect the adoption of this ASU to have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment, which amends ASC 350, Intangibles - Goodwill and Other. This ASU simplifies how an entity is required to test goodwill for impairment by eliminating step 2 from the goodwill impairment test. Step 2 measures goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company does not expect the adoption of this ASU to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases . This ASU requires, in most instances, a lessee to recognize on its balance sheet a liability to make lease payments (the lease liability) and also a right-of-use asset representing its right to use the underlying asset for the lease term. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those periods, using a modified retrospective approach with early adoption permitted. The Company will adopt ASU 2016-02 on January 1, 2019 using the modified retrospective approach, and the adoption is expected to have a material effect on the Company's consolidated financial statements. While the Company continues to assess the effect of adoption, the most significant expected change relates to the recognition of new right-of-use assets and lease liabilities on the consolidated balance sheet for real estate, machinery and equipment, and vehicle operating leases. Recently adopted accounting pronouncements In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation: Scope of Modification Accounting. This ASU provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The updated guidance is effective for interim and annual periods beginning after December 15, 2017, and early adoption was permitted. The Company adopted this ASU effective January 1, 2018. The adoption of this guidance did not have a material impact on the Company's financial position, results of operations or cash flows. In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business, which amends ASC 805, Business Combinations . This ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisition (or disposals) of assets or businesses. This ASU is effective for interim and annual reporting periods beginning after December 15, 2017. The Company adopted this ASU effective January 1, 2018. The adoption of this guidance did not have a material impact on the Company’s financial position, results of operations or cash flows. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments , which amends ASC 230, Statement of Cash Flows . This ASU provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. This ASU is effective for annual and interim periods beginning after December 15, 2017, and should be applied retrospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted this ASU effective January 1, 2018, with retrospective disclosure. As a result, the Company reclassified $1.0 million of cash outflow from financing activities to cash outflow from operations for the quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the Company’s financial position or results of operations. In May 2014, the FASB issued ASU 2014-09 (Topic 606), Revenue from Contracts with Customers . Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method. The adoption did not result in a cumulative effect adjustment to beginning retained earnings. Comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the impact of the adoption of the new standard to be immaterial to net income on an ongoing basis. See Note 3 for further detail.

Revenue

Revenue	3 Months Ended
	Mar. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Revenue	REVENUE The Company recognizes revenue when performance obligations under the terms of contracts with customers are satisfied, which generally occurs with the transfer of control of the Company’s products. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products to its customers. Sales, value add, and other taxes collected concurrent with revenue-producing activities are excluded from revenue. Incidental items, such as training, customer service, instruction manuals and service requirements, are generally immaterial in the context of the contract and are recognized as expense. For the majority of product sales, the Company transfers control and recognizes revenue when it ships the product from its manufacturing facility to its customer. The amount of consideration the Company receives and the revenue recognized varies with sales discounts, volume rebate programs and indexed material pricing. When the Company offers customers retrospective volume rebates, it estimates the expected rebates based on an analysis of historical experience. The Company adjusts its estimate of revenue related to volume rebates at the earlier of when the most likely amount of consideration expected to receive changes or when the consideration becomes fixed. When the Company offers customers prompt pay sales discounts or agrees to variable pricing based on material indices, it estimates the expected discounts or pricing adjustments based on an analysis of historical experience. The Company adjusts its estimate of revenue related to sales discounts and indexed material pricing to the expected value of the consideration to which the Company will be entitled. The Company includes the variable consideration in the transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur when the volume, discount or indexed material price uncertainties are resolved. The Company has elected to recognize shipping and handling costs as fulfillment costs when control over products have transferred to the customer, and records the expense within selling, general and administrative expense. See Note 12 - Segment Reporting for the Company’s disclosures of disaggregated revenue.

Acquisitions, Goodwill And Othe

Acquisitions, Goodwill And Other Intangible Assets	3 Months Ended
	Mar. 31, 2018
Acquisitions, Goodwill And Other Intangible Assets [Abstract]
Goodwill And Other Intangible Assets	ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS Acquisitions During the Three Months Ended March 31, 2018 Hehr In February 2018, the Company acquired substantially all of the business assets of Hehr International Inc. (“Hehr”), a manufacturer of windows and tempered and laminated glass for the RV, transit, specialty vehicle, and other adjacent industries, headquartered in Los Angeles, California. The preliminary purchase price was $50.1 million paid at closing, and is subject to potential post-closing adjustments related to net working capital. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The Company is validating account balances and finalizing the valuation for the acquisition. The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration $ 50,125 Customer relationships and other identifiable intangible assets $ 25,500 Net tangible assets 17,955 Total fair value of net assets acquired $ 43,455 Goodwill (tax deductible) $ 6,670 The customer relationships intangible asset is being amortized over its estimated useful life of 15 years . The consideration given was greater than the fair value of the net assets acquired, resulting in goodwill, because the Company anticipates the attainment of synergies and an increase in the markets for the acquired products. Taylor Made In January 2018, the Company acquired 100 percent of the equity interests of Taylor Made Group, LLC (“Taylor Made”), a marine supplier to boat builders and the aftermarket, as well as a key supplier to a host of other industrial end markets, headquartered in Gloversville, New York. The preliminary purchase price was $88.4 million , net of cash acquired, paid at closing, and is subject to potential post-closing adjustments related to net working capital. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The Company is validating account balances and finalizing the valuation for the acquisition. The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 88,445 Customer relationships $ 25,000 Other identifiable intangible assets 7,000 Net tangible assets 42,133 Total fair value of net assets acquired $ 74,133 Goodwill (tax deductible) $ 14,312 The customer relationships intangible asset is being amortized over its estimated useful life of 15 years . The consideration given was greater than the fair value of the net assets acquired, resulting in goodwill, because the Company anticipates the attainment of synergies and an increase in the markets for the acquired products. Acquisitions During the Three Months Ended March 31, 2017 Sessa Klein S.p.A. In February 2017, the Company acquired 100 percent of the outstanding shares of Sessa Klein S.p.A. (“Sessa Klein”), a manufacturer of highly engineered side window systems for both high speed and commuter trains, located near Varese, Italy. The purchase price was $8.5 million paid at closing, plus contingent consideration based on future sales by this operation. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The acquisition of this business was recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 6,502 Contingent consideration 3,838 Total fair value of consideration given $ 10,340 Identifiable intangible assets $ 2,286 Net tangible assets 364 Total fair value of net assets acquired $ 2,650 Goodwill (not tax deductible) $ 7,690 Goodwill Goodwill by reportable segment was as follows: (In thousands) OEM Segment Aftermarket Segment Total Net balance – December 31, 2017 $ 109,641 $ 14,542 $ 124,183 Acquisitions – 2018 17,785 3,197 20,982 Other 2,126 — 2,126 Net balance – March 31, 2018 $ 129,552 $ 17,739 $ 147,291 Goodwill represents the excess of the total consideration given in an acquisition of a business over the fair value of the net tangible and identifiable intangible assets acquired. Goodwill is not amortized, but instead is tested at the reporting unit level for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist. Changes in goodwill resulting from foreign currency translations and purchase accounting adjustments are presented as “Other” in the above table. Sessa Klein accounted for $1.4 million of the change in goodwill for the three months ended March 31, 2018 . Other Intangible Assets Other intangible assets consisted of the following at March 31, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 187,229 $ 45,393 $ 141,836 6 to 16 Patents 59,415 40,130 19,285 3 to 19 Trade names 14,833 5,607 9,226 3 to 15 Non-compete agreements 10,154 4,689 5,465 3 to 6 Other 309 117 192 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 276,627 $ 95,936 $ 180,691 Other intangible assets consisted of the following at March 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 113,513 $ 34,704 $ 78,809 6 to 16 Patents 57,347 34,850 22,497 3 to 19 Trade names 9,741 4,494 5,247 3 to 15 Non-compete agreements 6,076 3,230 2,846 3 to 6 Other 309 84 225 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 191,673 $ 77,362 $ 114,311 Other intangible assets consisted of the following at December 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,687 $ 42,276 $ 96,411 6 to 16 Patents 57,576 38,764 18,812 3 to 19 Trade names 10,995 5,381 5,614 3 to 15 Non-compete agreements 8,536 4,128 4,408 3 to 6 Other 309 109 200 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 220,790 $ 90,658 $ 130,132
Acquisitions	ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS Acquisitions During the Three Months Ended March 31, 2018 Hehr In February 2018, the Company acquired substantially all of the business assets of Hehr International Inc. (“Hehr”), a manufacturer of windows and tempered and laminated glass for the RV, transit, specialty vehicle, and other adjacent industries, headquartered in Los Angeles, California. The preliminary purchase price was $50.1 million paid at closing, and is subject to potential post-closing adjustments related to net working capital. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The Company is validating account balances and finalizing the valuation for the acquisition. The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration $ 50,125 Customer relationships and other identifiable intangible assets $ 25,500 Net tangible assets 17,955 Total fair value of net assets acquired $ 43,455 Goodwill (tax deductible) $ 6,670 The customer relationships intangible asset is being amortized over its estimated useful life of 15 years . The consideration given was greater than the fair value of the net assets acquired, resulting in goodwill, because the Company anticipates the attainment of synergies and an increase in the markets for the acquired products. Taylor Made In January 2018, the Company acquired 100 percent of the equity interests of Taylor Made Group, LLC (“Taylor Made”), a marine supplier to boat builders and the aftermarket, as well as a key supplier to a host of other industrial end markets, headquartered in Gloversville, New York. The preliminary purchase price was $88.4 million , net of cash acquired, paid at closing, and is subject to potential post-closing adjustments related to net working capital. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The Company is validating account balances and finalizing the valuation for the acquisition. The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 88,445 Customer relationships $ 25,000 Other identifiable intangible assets 7,000 Net tangible assets 42,133 Total fair value of net assets acquired $ 74,133 Goodwill (tax deductible) $ 14,312 The customer relationships intangible asset is being amortized over its estimated useful life of 15 years . The consideration given was greater than the fair value of the net assets acquired, resulting in goodwill, because the Company anticipates the attainment of synergies and an increase in the markets for the acquired products. Acquisitions During the Three Months Ended March 31, 2017 Sessa Klein S.p.A. In February 2017, the Company acquired 100 percent of the outstanding shares of Sessa Klein S.p.A. (“Sessa Klein”), a manufacturer of highly engineered side window systems for both high speed and commuter trains, located near Varese, Italy. The purchase price was $8.5 million paid at closing, plus contingent consideration based on future sales by this operation. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the Condensed Consolidated Statements of Income since the acquisition date. The acquisition of this business was recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 6,502 Contingent consideration 3,838 Total fair value of consideration given $ 10,340 Identifiable intangible assets $ 2,286 Net tangible assets 364 Total fair value of net assets acquired $ 2,650 Goodwill (not tax deductible) $ 7,690 Goodwill Goodwill by reportable segment was as follows: (In thousands) OEM Segment Aftermarket Segment Total Net balance – December 31, 2017 $ 109,641 $ 14,542 $ 124,183 Acquisitions – 2018 17,785 3,197 20,982 Other 2,126 — 2,126 Net balance – March 31, 2018 $ 129,552 $ 17,739 $ 147,291 Goodwill represents the excess of the total consideration given in an acquisition of a business over the fair value of the net tangible and identifiable intangible assets acquired. Goodwill is not amortized, but instead is tested at the reporting unit level for impairment annually in November, or more frequently if certain circumstances indicate a possible impairment may exist. Changes in goodwill resulting from foreign currency translations and purchase accounting adjustments are presented as “Other” in the above table. Sessa Klein accounted for $1.4 million of the change in goodwill for the three months ended March 31, 2018 . Other Intangible Assets Other intangible assets consisted of the following at March 31, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 187,229 $ 45,393 $ 141,836 6 to 16 Patents 59,415 40,130 19,285 3 to 19 Trade names 14,833 5,607 9,226 3 to 15 Non-compete agreements 10,154 4,689 5,465 3 to 6 Other 309 117 192 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 276,627 $ 95,936 $ 180,691 Other intangible assets consisted of the following at March 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 113,513 $ 34,704 $ 78,809 6 to 16 Patents 57,347 34,850 22,497 3 to 19 Trade names 9,741 4,494 5,247 3 to 15 Non-compete agreements 6,076 3,230 2,846 3 to 6 Other 309 84 225 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 191,673 $ 77,362 $ 114,311 Other intangible assets consisted of the following at December 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,687 $ 42,276 $ 96,411 6 to 16 Patents 57,576 38,764 18,812 3 to 19 Trade names 10,995 5,381 5,614 3 to 15 Non-compete agreements 8,536 4,128 4,408 3 to 6 Other 309 109 200 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 220,790 $ 90,658 $ 130,132

Inventories

Inventories	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories, valued at the lower of cost (first-in, first-out (FIFO) method) or market, consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Raw materials $ 268,054 $ 156,363 $ 233,187 Work in process 22,144 9,004 10,408 Finished goods 33,747 23,653 31,153 Inventories, net $ 323,945 $ 189,020 $ 274,748

Fixed Assets

Fixed Assets	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Fixed Assets	FIXED ASSETS Fixed assets consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Fixed assets, at cost $ 470,638 $ 350,081 $ 424,056 Less accumulated depreciation and amortization 204,042 171,159 195,106 Fixed assets, net $ 266,596 $ 178,922 $ 228,950

Accrued Expenses And Other Curr

Accrued Expenses And Other Current Liabilities	3 Months Ended
	Mar. 31, 2018
Payables and Accruals [Abstract]
Accrued Expenses And Other Current Liabilities	ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accrued expenses and other current liabilities consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Employee compensation and benefits $ 26,673 $ 31,202 $ 39,365 Current portion of accrued warranty 24,813 20,397 23,055 Taxes payable 8,916 14,624 3,561 Customer rebates 11,589 10,440 11,124 Other 37,827 24,357 25,744 Accrued expenses and other current liabilities $ 109,818 $ 101,020 $ 102,849 Estimated costs related to product warranties are accrued at the time products are sold. In estimating its future warranty obligations, the Company considers various factors, including the Company’s (i) historical warranty costs, (ii) current trends, (iii) product mix, and (iv) sales. The following table provides a reconciliation of the activity related to the Company’s accrued warranty, including both the current and long-term portions, for the three months ended March 31 : (In thousands) 2018 2017 Balance at beginning of period $ 38,502 $ 32,393 Provision for warranty expense 7,475 5,306 Warranty costs paid (5,717 ) (4,590 ) Balance at end of period 40,260 33,109 Less long-term portion 15,447 12,712 Current portion of accrued warranty $ 24,813 $ 20,397

Long-Term Indebtedness

Long-Term Indebtedness	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Long-Term Indebtedness	LONG-TERM INDEBTEDNESS At March 31, 2018 the Company had $177.0 million of outstanding borrowings on its line of credit with a weighted average interest rate of 3.0 percent . At March 31, 2017 and December 31, 2017 , the Company had no outstanding borrowings on its line of credit. On April 27, 2016, the Company refinanced its line of credit through an agreement with JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank. The agreement amended and restated the existing line of credit and expires on April 27, 2021 (the “Amended Credit Agreement”). In connection with this amendment and restatement, the line of credit was increased from $100.0 million to $200.0 million , and contains a feature allowing the Company to draw up to $50.0 million in approved foreign currencies, including Australian dollars, Canadian dollars, pounds sterling and euros. In February 2018, the Company exercised its right to increase the maximum borrowings under the Amended Credit Agreement from $200 million to $325 million . The terms and conditions of this incremental amendment remain the same, although an additional LIBO Rate period of one week was added. Interest on borrowings under the line of credit is designated from time to time by the Company as either (i) the Alternate Base Rate (defined in the Amended Credit Agreement as the greatest of (a) the Prime Rate of JPMorgan Chase Bank, N.A., (b) the federal funds effective rate plus 0.5 percent and (c) the Adjusted LIBO Rate (as defined in the Amended Credit Agreement) for a one month interest period plus 1.0 percent ), plus additional interest ranging from 0.0 percent to 0.625 percent ( 0.0 percent at March 31, 2018 ) depending on the Company’s performance and financial condition, or (ii) the Adjusted LIBO Rate for a period equal to one week and one, two, three, six or twelve months as selected by the Company, plus additional interest ranging from 1.0 percent to 1.625 percent ( 1.0 percent at March 31, 2018 ) depending on the Company’s performance and financial condition. At March 31, 2018 and 2017 , the Company had $2.4 million and $2.5 million , respectively, in issued, but undrawn, standby letters of credit under the line of credit. Availability under the Company’s line of credit was $145.6 million at March 31, 2018 . On February 24, 2014, the Company entered into a $150.0 million shelf-loan facility (the “Shelf-Loan” Facility) with Prudential Investment Management, Inc. and its affiliates (“Prudential”) . On March 20, 2015, the Company issued $50.0 million of Senior Promissory Notes (“Series A Notes”) to Prudential for a term of five years, at a fixed interest rate of 3.35 percent per annum, payable quarterly in arrears, of which the entire amount was outstanding at March 31, 2018 . At March 31, 2018 , the fair value of the Company’s long-term debt approximates the carrying value, as estimated using quoted market prices and discounted future cash flows based on similar borrowing arrangements. On March 30, 2017, the Company amended its Shelf-Loan Facility to extend the term through March 30, 2020. In connection with this amendment, the facility provides for Prudential to consider purchasing, at the Company’s request, in one or a series of transactions, Senior Promissory Notes of the Company in the aggregate principal amount of up to $150.0 million (excluding the Company’s Series A Notes already outstanding). Prudential has no obligation to purchase the Senior Promissory Notes. Interest payable on the Senior Promissory Notes will be at rates determined by Prudential within five business days after the Company issues a request to Prudential. Availability under the Company’s Shelf-Loan Facility was $150.0 million at March 31, 2018 . However, the Amended Credit Agreement limits the aggregate indebtedness outstanding to Prudential from time to time to $150.0 million ; therefore, currently the Company can only access an additional $100.0 million under the Shelf-Loan Facility. Borrowings under both the line of credit and the Shelf-Loan Facility are secured on a pari-passu basis by first priority liens on the capital stock or other equity interests of the Company’s direct and indirect subsidiaries (including up to 65 percent of the equity interest of certain “controlled foreign corporations.”) Pursuant to the Amended Credit Agreement and Shelf-Loan Facility, the Company is required to maintain minimum interest and fixed charge coverages, and to meet certain other financial requirements. At March 31, 2018 and 2017 , the Company was in compliance with all such requirements, and expects to remain in compliance for the next twelve months. Availability under both the Amended Credit Agreement and the Shelf-Loan Facility is subject to a maximum net leverage ratio covenant which limits the amount of consolidated outstanding indebtedness to 2.5 times the trailing twelve-month EBITDA, as defined. This limitation did not impact the Company’s borrowing availability at March 31, 2018 . The remaining availability under these facilities was $245.6 million at March 31, 2018 . The Company believes the availability under the Amended Credit Agreement and Shelf-Loan Facility is adequate to finance the Company’s anticipated cash requirements for the next twelve months.

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Contingent Consideration In connection with several business acquisitions, if certain sales targets for the acquired products are achieved, the Company will be required to pay additional cash consideration. The Company has recorded a liability for the fair value of this contingent consideration at March 31, 2018 and 2017 , based on the present value of the expected future cash flows using a market participant’s weighted average cost of capital of 13.6 percent and 13.7 percent , respectively. As required, the liability for this contingent consideration is measured at fair value quarterly, considering actual sales of the acquired products, updated sales projections, and the updated market participant weighted average cost of capital. Depending upon the weighted average costs of capital and future sales of the products which are subject to contingent consideration, the Company could record adjustments in future periods. The following table provides a reconciliation of the Company’s contingent consideration liability for the three months ended March 31 : (In thousands) 2018 2017 Balance at beginning of period $ 12,545 $ 9,241 Acquisitions — 4,922 Payments (1,160 ) (1,884 ) Accretion (a) 337 292 Fair value adjustments (a) (1,248 ) 815 Net foreign currency translation adjustment (151 ) — Balance at end of the period (b) 10,323 13,386 Less current portion in accrued expenses and other current liabilities (3,785 ) (5,797 ) Total long-term portion in other long-term liabilities $ 6,538 $ 7,589 (a) Recorded in selling, general and administrative expenses in the Condensed Consolidated Statements of Income. (b) Amounts represent the fair value of estimated remaining payments. The total estimated remaining payments as of March 31, 2018 are $12.4 million undiscounted. The liability for contingent consideration expires at various dates through September 2029. Certain of the contingent consideration arrangements are subject to a maximum payment amount, while the remaining arrangements have no maximum contingent consideration. Furrion Distribution and Supply Agreement In July 2015, the Company entered into a six -year exclusive distribution and supply agreement with Furrion Limited (“Furrion”), a Hong Kong based firm that designs, engineers and supplies premium electronics. This agreement provides the Company with the rights to distribute Furrion’s complete line of products to OEMs and aftermarket customers in the RV, specialty vehicle, utility trailer, horse trailer, marine, transit bus and school bus industries throughout the United States and Canada. Furrion currently supplies a premium line of televisions, sound systems, navigation systems, wireless backup cameras, solar prep units, power solutions, fireplaces and kitchen appliances, primarily to the RV industry. In connection with this agreement, the Company entered into minimum purchase obligations (“MPOs”), which Furrion and the Company agreed to review after the first year on an annual basis and adjust as necessary based upon current economic and industry conditions, the development and customer acceptance of new Furrion products, competition and other factors which impact demand for Furrion products. Subject to agreed upon revisions to the MPOs, Furrion has the right to either terminate the distribution agreement with six months’ notice or remove exclusivity from the Company if the Company misses an MPO in any given year by more than ten percent, after taking into account excess purchases from the previous year. If exclusivity is withdrawn, the Company at its election may terminate the distribution agreement with six months’ notice. Upon termination of the agreement, Furrion has agreed to purchase from the Company any non-obsolete stocks of Furrion products at the cost paid by the Company. Product Recalls From time to time, the Company cooperates with and assists its customers on their product recalls and inquiries, and occasionally receives inquiries directly from the National Highway Traffic Safety Administration (“NHTSA”) regarding reported incidents involving the Company’s products. As a result, the Company has incurred expenses associated with product recalls from time to time, and may incur expenditures for future investigations or product recalls. Environmental The Company’s operations are subject to certain Federal, state and local regulatory requirements relating to the use, storage, discharge and disposal of hazardous materials used during the manufacturing processes. Although the Company believes its operations have been consistent with prevailing industry standards, and are in substantial compliance with applicable environmental laws and regulations, one or more of the Company’s current or former operating sites, or adjacent sites owned by third parties, have been affected by releases of hazardous materials. As a result, the Company may incur expenditures for future investigation and remediation of these sites, including in conjunction with voluntary remediation programs or third-party claims. Litigation In the normal course of business, the Company is subject to proceedings, lawsuits, regulatory agency inquiries and other claims. All such matters are subject to uncertainties and outcomes that are not predictable with assurance. While these matters could materially affect operating results when resolved in future periods, it is management’s opinion that, after final disposition, including anticipated insurance recoveries in certain cases, any monetary liability or financial impact to the Company beyond that provided in the Condensed Consolidated Balance Sheet as of March 31, 2018 , would not be material to the Company’s financial position or annual results of operations.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY The following table summarizes information about shares of the Company’s common stock at: March 31, December 31, (In thousands) 2018 2017 2017 Common stock authorized 75,000 75,000 75,000 Common stock issued 27,898 27,590 27,674 Treasury stock 2,684 2,684 2,684 The following reconciliation details the denominator used in the computation of basic and diluted earnings per share: Three Months Ended (In thousands) 2018 2017 Weighted average shares outstanding for basic earnings per share 25,149 24,906 Common stock equivalents pertaining to stock-based awards 316 349 Weighted average shares outstanding for diluted earnings per share 25,465 25,255 The weighted average diluted shares outstanding for the three months ended March 31, 2018 and 2017 , exclude the effect of 447,625 and 143,270 shares of common stock, respectively, subject to stock-based awards. Such shares were excluded from total diluted shares because they were anti-dilutive or the specified performance conditions those shares were subject to were not yet achieved. The table below summarizes the regular quarterly dividends declared and paid during the periods ended March 31, 2018 and December 31, 2017 : (In thousands, except per share data) Per Share Record Date Payment Date Total Paid First Quarter 2017 $ 0.50 03/06/17 03/17/17 $ 12,442 Second Quarter 2017 0.50 05/19/17 06/02/17 12,445 Third Quarter 2017 0.50 08/18/17 09/01/17 12,459 Fourth Quarter 2017 0.55 11/17/17 12/01/17 13,711 Total 2017 $ 2.05 $ 51,057 First Quarter 2018 $ 0.55 03/16/18 03/29/18 $ 13,858 In February 2017 , the Company issued 63,677 deferred stock units at the average price of $108.47 , or $6.9 million , to executive officers in lieu of cash for a portion of their 2016 incentive compensation.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Recurring The following table presents the Company’s assets and liabilities measured at fair value on a recurring basis at: March 31, 2018 December 31, 2017 (In thousands) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Unrealized gain on derivative $ 1,478 $ — $ 1,478 $ — $ 930 $ — $ 930 $ — Liabilities Contingent consideration $ 10,323 $ — $ — $ 10,323 $ 12,545 $ — $ — $ 12,545 Contingent Consideration Related to Acquisitions Liabilities for contingent consideration related to acquisitions were fair valued using management’s projections for long-term sales forecasts, including assumptions regarding market share gains and future industry-specific economic and market conditions, and a market participant’s weighted average cost of capital. Over the next six years , the Company’s long-term sales growth forecasts for products subject to contingent consideration arrangements average approximately 12 percent per year. For further information on the inputs used in determining the fair value, and a roll-forward of the contingent consideration liability, see Note 9 of the Notes to Condensed Consolidated Financial Statements. Changes in either of the inputs in isolation would result in a change in the fair value measurement. A change in the assumptions used for sales forecasts would result in a directionally similar change in the fair value liability, while a change in the weighted average cost of capital would result in a directionally opposite change in the fair value liability. If there is an increase in the fair value liability, the Company would record a charge to selling, general and administrative expenses, and if there is a decrease in the fair value liability, the Company would record a benefit in selling, general and administrative expenses. Derivative Instruments At March 31, 2018 , the Company had derivative instruments for 9.0 million pounds of steel, in order to manage a portion of the exposure to movements associated with steel costs. These derivative instruments expire in December 2018, at an average steel price of $0.25 per pound. While these derivative instruments are considered to be economic hedges of the underlying movement in the price of steel, they are not designated or accounted for as a hedge. These derivative instruments were valued at fair value using a market approach based on the quoted market prices of similar instruments at the end of each reporting period, and the resulting net loss was recorded in selling, general and administrative expenses in the Condensed Consolidated Statements of Income. At March 31, 2018 , the $1.5 million corresponding asset was recorded in other current assets as reflected in the Condensed Consolidated Balance Sheets. A net gain of $0.5 million was recorded in selling, general and administrative expenses in the Condensed Consolidated Statements of Income during the three months ended March 31, 2018 . Non-recurring The following table presents the carrying value on the measurement date of any assets and liabilities which were measured at fair value and recorded at the lower of cost or fair value, on a non-recurring basis, using significant unobservable inputs (Level 3), and the corresponding non-recurring losses or (gains) recognized during the three months ended March 31 : 2018 2017 (In thousands) Carrying Non-Recurring Carrying Non-Recurring Assets Net assets of acquired businesses 117,588 — 2,650 — Net Assets of Acquired Businesses The Company valued the assets and liabilities associated with the acquisitions of businesses on the respective acquisition dates. Depending upon the type of asset acquired or liability assumed, the Company used different valuation techniques in determining the fair value. Those techniques included comparable market prices, long-term sales, profitability and cash flow forecasts, assumptions regarding future industry-specific economic and market conditions, a market participant’s weighted average cost of capital, as well as other techniques as circumstances required. For further information on acquired assets and assumed liabilities, see Note 4 of the Notes to Condensed Consolidated Financial Statements.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	SEGMENT REPORTING The Company has two reportable segments, the OEM Segment and the Aftermarket Segment. Intersegment sales are insignificant. The OEM Segment, which accounted for 92 percent of consolidated net sales for each of the three months ended March 31, 2018 and 2017 , manufactures or distributes a broad array of components for the leading OEMs of RVs and adjacent industries, including buses; trailers used to haul boats, livestock, equipment and other cargo; trucks; pontoon boats; trains; manufactured homes; and modular housing. Approximately 67 percent of the Company’s OEM Segment net sales for the three months ended March 31, 2018 were of components for travel trailer and fifth-wheel RVs. The Aftermarket Segment, which accounted for eight percent of consolidated net sales for each of the three month periods ended March 31, 2018 and 2017 , supplies components to the related aftermarket channels of the RV and adjacent industries, primarily to retail dealers, wholesale distributors and service centers. The Aftermarket Segment also includes the sale of replacement glass and awnings to fulfill insurance claims. Decisions concerning the allocation of the Company’s resources are made by the Company’s chief operating decision maker (“CODM”), with oversight by the Board of Directors. The CODM evaluates the performance of each segment based upon segment operating profit or loss, generally defined as income or loss before interest and income taxes. Decisions concerning the allocation of resources are also based on each segment’s utilization of assets. Management of debt is a corporate function. The accounting policies of the OEM and Aftermarket Segments are the same as those described in Note 2 of the Notes to Consolidated Financial Statements of the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . The following table presents the Company’s revenues disaggregated by segment and geography based on the billing address of the Company’s customers: Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 (In thousands) U.S. (a) Int'l (b) Total U.S. (a) Int'l (b) Total OEM Segment: RV OEMs: Travel trailers and fifth-wheels $ 403,742 $ 1,215 $ 404,957 $ 329,318 $ 956 $ 330,274 Motorhomes 43,406 9,509 52,915 33,762 3,282 37,044 Adjacent industries OEMs 133,408 8,899 142,307 92,531 2,180 94,711 Total OEM Segment net sales 580,556 19,623 600,179 455,611 6,418 462,029 Aftermarket Segment: Total Aftermarket Segment net sales 47,346 2,967 50,313 33,963 2,344 36,307 Total net sales $ 627,902 $ 22,590 $ 650,492 $ 489,574 $ 8,762 $ 498,336 (a) Net sales to customers in the United States of America (b) Net sales to customers in countries domiciled outside of the United States of America The following table presents the Company’s operating profit by segment: Three Months Ended (In thousands) 2018 2017 Operating profit: OEM Segment $ 53,940 $ 54,397 Aftermarket Segment 5,880 4,732 Total operating profit $ 59,820 $ 59,129 The following table presents the Company’s revenue disaggregated by product: Three Months Ended (In thousands) 2018 2017 OEM Segment: Chassis, chassis parts and slide-out mechanisms $ 252,702 $ 222,949 Windows and doors 149,520 97,200 Furniture and mattresses 105,518 71,174 Axles and suspension solutions 33,605 32,181 Other 58,834 38,525 Total OEM Segment net sales 600,179 462,029 Total Aftermarket Segment net sales 50,313 36,307 Total net sales $ 650,492 $ 498,336

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Use of Estimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to product returns, sales and purchase rebates, accounts receivable, inventories, goodwill and other intangible assets, net assets of acquired businesses, income taxes, warranty and product recall obligations, self-insurance obligations, lease terminations, asset retirement obligations, long-lived assets, post-retirement benefits, stock-based compensation, segment allocations, contingent consideration, environmental liabilities, contingencies and litigation. The Company bases its estimates on historical experience, other available information and various other assumptions believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities not readily apparent from other resources. Actual results and events could differ significantly from management estimates.
New Accounting Pronouncements	Recent Accounting Pronouncements Recently issued accounting pronouncements not yet adopted In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-12, Targeted Improvements to Accounting for Hedging Activities, which amends ASC 815, Derivatives and Hedging. This ASU better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company does not expect the adoption of this ASU to have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment, which amends ASC 350, Intangibles - Goodwill and Other. This ASU simplifies how an entity is required to test goodwill for impairment by eliminating step 2 from the goodwill impairment test. Step 2 measures goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This ASU is effective for interim and annual reporting periods, beginning after December 15, 2019, and early adoption is permitted. The Company does not expect the adoption of this ASU to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases . This ASU requires, in most instances, a lessee to recognize on its balance sheet a liability to make lease payments (the lease liability) and also a right-of-use asset representing its right to use the underlying asset for the lease term. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those periods, using a modified retrospective approach with early adoption permitted. The Company will adopt ASU 2016-02 on January 1, 2019 using the modified retrospective approach, and the adoption is expected to have a material effect on the Company's consolidated financial statements. While the Company continues to assess the effect of adoption, the most significant expected change relates to the recognition of new right-of-use assets and lease liabilities on the consolidated balance sheet for real estate, machinery and equipment, and vehicle operating leases. Recently adopted accounting pronouncements In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation: Scope of Modification Accounting. This ASU provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The updated guidance is effective for interim and annual periods beginning after December 15, 2017, and early adoption was permitted. The Company adopted this ASU effective January 1, 2018. The adoption of this guidance did not have a material impact on the Company's financial position, results of operations or cash flows. In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business, which amends ASC 805, Business Combinations . This ASU clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisition (or disposals) of assets or businesses. This ASU is effective for interim and annual reporting periods beginning after December 15, 2017. The Company adopted this ASU effective January 1, 2018. The adoption of this guidance did not have a material impact on the Company’s financial position, results of operations or cash flows. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments , which amends ASC 230, Statement of Cash Flows . This ASU provides guidance on the statement of cash flows presentation of certain transactions where diversity in practice exists. This ASU is effective for annual and interim periods beginning after December 15, 2017, and should be applied retrospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted this ASU effective January 1, 2018, with retrospective disclosure. As a result, the Company reclassified $1.0 million of cash outflow from financing activities to cash outflow from operations for the quarter ended March 31, 2017. The adoption of this guidance did not have a material impact on the Company’s financial position or results of operations. In May 2014, the FASB issued ASU 2014-09 (Topic 606), Revenue from Contracts with Customers . Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 as of January 1, 2018 using the modified retrospective transition method. The adoption did not result in a cumulative effect adjustment to beginning retained earnings. Comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company expects the impact of the adoption of the new standard to be immaterial to net income on an ongoing basis. See Note 3 for further detail.
Revenue Recognition	The Company recognizes revenue when performance obligations under the terms of contracts with customers are satisfied, which generally occurs with the transfer of control of the Company’s products. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring its products to its customers. Sales, value add, and other taxes collected concurrent with revenue-producing activities are excluded from revenue. Incidental items, such as training, customer service, instruction manuals and service requirements, are generally immaterial in the context of the contract and are recognized as expense. For the majority of product sales, the Company transfers control and recognizes revenue when it ships the product from its manufacturing facility to its customer. The amount of consideration the Company receives and the revenue recognized varies with sales discounts, volume rebate programs and indexed material pricing. When the Company offers customers retrospective volume rebates, it estimates the expected rebates based on an analysis of historical experience. The Company adjusts its estimate of revenue related to volume rebates at the earlier of when the most likely amount of consideration expected to receive changes or when the consideration becomes fixed. When the Company offers customers prompt pay sales discounts or agrees to variable pricing based on material indices, it estimates the expected discounts or pricing adjustments based on an analysis of historical experience. The Company adjusts its estimate of revenue related to sales discounts and indexed material pricing to the expected value of the consideration to which the Company will be entitled. The Company includes the variable consideration in the transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur when the volume, discount or indexed material price uncertainties are resolved. The Company has elected to recognize shipping and handling costs as fulfillment costs when control over products have transferred to the customer, and records the expense within selling, general and administrative expense.

Acquisitions, Goodwill And Ot22

Acquisitions, Goodwill And Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Business Acquisition [Line Items]
Schedule of Goodwill	Goodwill by reportable segment was as follows: (In thousands) OEM Segment Aftermarket Segment Total Net balance – December 31, 2017 $ 109,641 $ 14,542 $ 124,183 Acquisitions – 2018 17,785 3,197 20,982 Other 2,126 — 2,126 Net balance – March 31, 2018 $ 129,552 $ 17,739 $ 147,291
Schedule of Other Intangible Assets	Other intangible assets consisted of the following at March 31, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 187,229 $ 45,393 $ 141,836 6 to 16 Patents 59,415 40,130 19,285 3 to 19 Trade names 14,833 5,607 9,226 3 to 15 Non-compete agreements 10,154 4,689 5,465 3 to 6 Other 309 117 192 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 276,627 $ 95,936 $ 180,691 Other intangible assets consisted of the following at March 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 113,513 $ 34,704 $ 78,809 6 to 16 Patents 57,347 34,850 22,497 3 to 19 Trade names 9,741 4,494 5,247 3 to 15 Non-compete agreements 6,076 3,230 2,846 3 to 6 Other 309 84 225 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 191,673 $ 77,362 $ 114,311 Other intangible assets consisted of the following at December 31, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,687 $ 42,276 $ 96,411 6 to 16 Patents 57,576 38,764 18,812 3 to 19 Trade names 10,995 5,381 5,614 3 to 15 Non-compete agreements 8,536 4,128 4,408 3 to 6 Other 309 109 200 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 220,790 $ 90,658 $ 130,132
Hehr
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration $ 50,125 Customer relationships and other identifiable intangible assets $ 25,500 Net tangible assets 17,955 Total fair value of net assets acquired $ 43,455 Goodwill (tax deductible) $ 6,670
Taylor Made
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The acquisition of this business was preliminarily recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 88,445 Customer relationships $ 25,000 Other identifiable intangible assets 7,000 Net tangible assets 42,133 Total fair value of net assets acquired $ 74,133 Goodwill (tax deductible) $ 14,312
SessaKlein S.p.A.
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The acquisition of this business was recorded on the acquisition date as follows (in thousands) : Cash consideration, net of cash acquired $ 6,502 Contingent consideration 3,838 Total fair value of consideration given $ 10,340 Identifiable intangible assets $ 2,286 Net tangible assets 364 Total fair value of net assets acquired $ 2,650 Goodwill (not tax deductible) $ 7,690

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Schedule Of Inventories	Inventories, valued at the lower of cost (first-in, first-out (FIFO) method) or market, consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Raw materials $ 268,054 $ 156,363 $ 233,187 Work in process 22,144 9,004 10,408 Finished goods 33,747 23,653 31,153 Inventories, net $ 323,945 $ 189,020 $ 274,748

Fixed Assets (Tables)

Fixed Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule Of Fixed Assets	Fixed assets consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Fixed assets, at cost $ 470,638 $ 350,081 $ 424,056 Less accumulated depreciation and amortization 204,042 171,159 195,106 Fixed assets, net $ 266,596 $ 178,922 $ 228,950

Accrued Expenses And Other Cu25

Accrued Expenses And Other Current Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Payables and Accruals [Abstract]
Schedule Of Accrued Expenses And Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following at: March 31, December 31, (In thousands) 2018 2017 2017 Employee compensation and benefits $ 26,673 $ 31,202 $ 39,365 Current portion of accrued warranty 24,813 20,397 23,055 Taxes payable 8,916 14,624 3,561 Customer rebates 11,589 10,440 11,124 Other 37,827 24,357 25,744 Accrued expenses and other current liabilities $ 109,818 $ 101,020 $ 102,849
Schedule Of Reconciliation Of The Activity Related To Accrued Warranty	The following table provides a reconciliation of the activity related to the Company’s accrued warranty, including both the current and long-term portions, for the three months ended March 31 : (In thousands) 2018 2017 Balance at beginning of period $ 38,502 $ 32,393 Provision for warranty expense 7,475 5,306 Warranty costs paid (5,717 ) (4,590 ) Balance at end of period 40,260 33,109 Less long-term portion 15,447 12,712 Current portion of accrued warranty $ 24,813 $ 20,397

Commitments And Contingencies (

Commitments And Contingencies (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Reconciliation Of Contingent Consideration Liability	The following table provides a reconciliation of the Company’s contingent consideration liability for the three months ended March 31 : (In thousands) 2018 2017 Balance at beginning of period $ 12,545 $ 9,241 Acquisitions — 4,922 Payments (1,160 ) (1,884 ) Accretion (a) 337 292 Fair value adjustments (a) (1,248 ) 815 Net foreign currency translation adjustment (151 ) — Balance at end of the period (b) 10,323 13,386 Less current portion in accrued expenses and other current liabilities (3,785 ) (5,797 ) Total long-term portion in other long-term liabilities $ 6,538 $ 7,589 (a) Recorded in selling, general and administrative expenses in the Condensed Consolidated Statements of Income. (b) Amounts represent the fair value of estimated remaining payments. The total estimated remaining payments as of March 31, 2018 are $12.4 million undiscounted. The liability for contingent consideration expires at various dates through September 2029. Certain of the contingent consideration arrangements are subject to a maximum payment amount, while the remaining arrangements have no maximum contingent consideration.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Summary Of Common Stock Information	The following table summarizes information about shares of the Company’s common stock at: March 31, December 31, (In thousands) 2018 2017 2017 Common stock authorized 75,000 75,000 75,000 Common stock issued 27,898 27,590 27,674 Treasury stock 2,684 2,684 2,684
Schedule Of Computation Of Basic And Diluted Earnings Per Share	The following reconciliation details the denominator used in the computation of basic and diluted earnings per share: Three Months Ended (In thousands) 2018 2017 Weighted average shares outstanding for basic earnings per share 25,149 24,906 Common stock equivalents pertaining to stock-based awards 316 349 Weighted average shares outstanding for diluted earnings per share 25,465 25,255
Schedule of Dividends Declared	The table below summarizes the regular quarterly dividends declared and paid during the periods ended March 31, 2018 and December 31, 2017 : (In thousands, except per share data) Per Share Record Date Payment Date Total Paid First Quarter 2017 $ 0.50 03/06/17 03/17/17 $ 12,442 Second Quarter 2017 0.50 05/19/17 06/02/17 12,445 Third Quarter 2017 0.50 08/18/17 09/01/17 12,459 Fourth Quarter 2017 0.55 11/17/17 12/01/17 13,711 Total 2017 $ 2.05 $ 51,057 First Quarter 2018 $ 0.55 03/16/18 03/29/18 $ 13,858

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following table presents the Company’s assets and liabilities measured at fair value on a recurring basis at: March 31, 2018 December 31, 2017 (In thousands) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Unrealized gain on derivative $ 1,478 $ — $ 1,478 $ — $ 930 $ — $ 930 $ — Liabilities Contingent consideration $ 10,323 $ — $ — $ 10,323 $ 12,545 $ — $ — $ 12,545
Schedule Of Non-Recurring Losses Recognized Using Fair Value Measurements And The Carrying Value Of Any Assets And Liabilities Measured Using Fair Value Estimates	The following table presents the carrying value on the measurement date of any assets and liabilities which were measured at fair value and recorded at the lower of cost or fair value, on a non-recurring basis, using significant unobservable inputs (Level 3), and the corresponding non-recurring losses or (gains) recognized during the three months ended March 31 : 2018 2017 (In thousands) Carrying Non-Recurring Carrying Non-Recurring Assets Net assets of acquired businesses 117,588 — 2,650 —

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Disaggregation of Revenue	The following table presents the Company’s revenues disaggregated by segment and geography based on the billing address of the Company’s customers: Three Months Ended March 31, 2018 Three Months Ended March 31, 2017 (In thousands) U.S. (a) Int'l (b) Total U.S. (a) Int'l (b) Total OEM Segment: RV OEMs: Travel trailers and fifth-wheels $ 403,742 $ 1,215 $ 404,957 $ 329,318 $ 956 $ 330,274 Motorhomes 43,406 9,509 52,915 33,762 3,282 37,044 Adjacent industries OEMs 133,408 8,899 142,307 92,531 2,180 94,711 Total OEM Segment net sales 580,556 19,623 600,179 455,611 6,418 462,029 Aftermarket Segment: Total Aftermarket Segment net sales 47,346 2,967 50,313 33,963 2,344 36,307 Total net sales $ 627,902 $ 22,590 $ 650,492 $ 489,574 $ 8,762 $ 498,336 (a) Net sales to customers in the United States of America (b) Net sales to customers in countries domiciled outside of the United States of America The following table presents the Company’s revenue disaggregated by product: Three Months Ended (In thousands) 2018 2017 OEM Segment: Chassis, chassis parts and slide-out mechanisms $ 252,702 $ 222,949 Windows and doors 149,520 97,200 Furniture and mattresses 105,518 71,174 Axles and suspension solutions 33,605 32,181 Other 58,834 38,525 Total OEM Segment net sales 600,179 462,029 Total Aftermarket Segment net sales 50,313 36,307 Total net sales $ 650,492 $ 498,336
Schedule Of Information Relating To Segments	The following table presents the Company’s operating profit by segment: Three Months Ended (In thousands) 2018 2017 Operating profit: OEM Segment $ 53,940 $ 54,397 Aftermarket Segment 5,880 4,732 Total operating profit $ 59,820 $ 59,129

Basis of Presentation (Details)

Basis of Presentation (Details)	Mar. 31, 2018
Manufacturing Facility
Property, Plant and Equipment
Manufacturing Facilities	65

Summary of Significant Accoun31

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease of cash outflow from financing activities	$ 148,501	$ (20,990)
Increase of cash outflow from operating activities	$ 5,103	(21,711)
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease of cash outflow from financing activities		1,000
Increase of cash outflow from operating activities		$ 1,000

Acquisitions, Goodwill And Ot32

Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	Feb. 01, 2017	Feb. 28, 2018	Jan. 31, 2018	Feb. 28, 2017	Mar. 31, 2018
Business Acquisition [Line Items]
Change in goodwill					$ 2,126
Hehr
Business Acquisition [Line Items]
Cash consideration		$ 50,125
Hehr | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life			15 years
Taylor Made
Business Acquisition [Line Items]
Cash consideration			$ 88,445
Percentage of interests acquired			100.00%
SessaKlein S.p.A.
Business Acquisition [Line Items]
Percentage of interests acquired				100.00%
Total purchase price	$ 10,340			$ 8,500
Change in goodwill					$ 1,400

Acquisitions, Goodwill And Ot33

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Business Acquisitions) (Details) - USD ($) $ in Thousands	Feb. 01, 2017	Feb. 28, 2018	Jan. 31, 2018	Feb. 28, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Cash consideration net of cash acquired					$ 138,570	$ 10,689
Goodwill					$ 147,291	$ 98,105	$ 124,183
Taylor Made
Business Acquisition [Line Items]
Cash consideration			$ 88,445
Net tangible assets			42,133
Total fair value of net assets acquired			74,133
Goodwill			14,312
Hehr
Business Acquisition [Line Items]
Cash consideration		$ 50,125
Identifiable intangible assets		25,500
Net tangible assets		17,955
Total fair value of net assets acquired		43,455
Goodwill		$ 6,670
SessaKlein S.p.A.
Business Acquisition [Line Items]
Cash consideration net of cash acquired	$ 6,502
Contingent consideration	3,838
Total fair value of consideration given	$ 10,340			$ 8,500
Identifiable intangible assets				2,286
Net tangible assets				364
Total fair value of net assets acquired				2,650
Goodwill				$ 7,690
Customer Relationships | Taylor Made
Business Acquisition [Line Items]
Identifiable intangible assets			25,000
Other Intangible Assets | Taylor Made
Business Acquisition [Line Items]
Identifiable intangible assets			$ 7,000

Acquisitions, Goodwill And Ot34

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reportable Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Segment Reporting Information
Net balance – December 31, 2017	$ 124,183
Acquisitions – 2018	20,982
Other	2,126
Net balance – March 31, 2018	147,291
OEM Segment
Segment Reporting Information
Net balance – December 31, 2017	109,641
Acquisitions – 2018	17,785
Other	2,126
Net balance – March 31, 2018	129,552
Aftermarket Segment
Segment Reporting Information
Net balance – December 31, 2017	14,542
Acquisitions – 2018	3,197
Other	0
Net balance – March 31, 2018	$ 17,739

Acquisitions, Goodwill And Ot35

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Acquired Intangible Assets
Finite-Lived Intangible Assets, Accumulated Amortization	$ 95,936	$ 77,362	$ 90,658
Intangible Assets, Gross (Excluding Goodwill)	276,627	191,673	220,790
Intangible Assets, Net (Excluding Goodwill)	180,691	114,311	130,132
Customer Relationships
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	187,229	113,513	138,687
Finite-Lived Intangible Assets, Accumulated Amortization	45,393	34,704	42,276
Finite-Lived Intangible Assets, Net	$ 141,836	$ 78,809	96,411
Customer Relationships | Minimum
Acquired Intangible Assets
Estimated useful life in years	6 years	6 years
Customer Relationships | Maximum
Acquired Intangible Assets
Estimated useful life in years	16 years	16 years
Patents
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 59,415	$ 57,347	57,576
Finite-Lived Intangible Assets, Accumulated Amortization	40,130	34,850	38,764
Finite-Lived Intangible Assets, Net	$ 19,285	$ 22,497	18,812
Patents | Minimum
Acquired Intangible Assets
Estimated useful life in years	3 years	3 years
Patents | Maximum
Acquired Intangible Assets
Estimated useful life in years	19 years	19 years
Tradenames
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 14,833	$ 9,741	10,995
Finite-Lived Intangible Assets, Accumulated Amortization	5,607	4,494	5,381
Finite-Lived Intangible Assets, Net	$ 9,226	$ 5,247	5,614
Tradenames | Minimum
Acquired Intangible Assets
Estimated useful life in years	3 years	3 years
Tradenames | Maximum
Acquired Intangible Assets
Estimated useful life in years	15 years	15 years
Non-compete Agreements
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 10,154	$ 6,076	8,536
Finite-Lived Intangible Assets, Accumulated Amortization	4,689	3,230	4,128
Finite-Lived Intangible Assets, Net	$ 5,465	$ 2,846	4,408
Non-compete Agreements | Minimum
Acquired Intangible Assets
Estimated useful life in years	3 years	3 years
Non-compete Agreements | Maximum
Acquired Intangible Assets
Estimated useful life in years	6 years	6 years
Other
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	$ 309	$ 309	309
Finite-Lived Intangible Assets, Accumulated Amortization	117	84	109
Finite-Lived Intangible Assets, Net	$ 192	$ 225	200
Other | Minimum
Acquired Intangible Assets
Estimated useful life in years	2 years	2 years
Other | Maximum
Acquired Intangible Assets
Estimated useful life in years	12 years	12 years
Purchased research and development
Acquired Intangible Assets
Indefinite-Lived Intangible Assets - Purchased research and development	$ 4,687	$ 4,687	$ 4,687

Inventories (Schedule Of Invent

Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 268,054	$ 233,187	$ 156,363
Work in process	22,144	10,408	9,004
Finished goods	33,747	31,153	23,653
Inventories, net	$ 323,945	$ 274,748	$ 189,020

Fixed Assets (Schedule Of Fixed

Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Fixed assets, at cost	$ 470,638	$ 424,056	$ 350,081
Less accumulated depreciation and amortization	204,042	195,106	171,159
Fixed assets, net	$ 266,596	$ 228,950	$ 178,922

Accrued Expenses And Other Cu38

Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 26,673	$ 39,365	$ 31,202
Current portion of accrued warranty	24,813	23,055	20,397
Taxes payable	8,916	3,561	14,624
Customer rebates	11,589	11,124	10,440
Other	37,827	25,744	24,357
Accrued expenses and other current liabilities	$ 109,818	$ 102,849	$ 101,020

Accrued Expenses And Other Cu39

Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 38,502	$ 32,393
Provision for warranty expense	7,475	5,306
Warranty costs paid	(5,717)	(4,590)
Balance at end of period	40,260	33,109
Less long-term portion	15,447	12,712
Current portion of accrued warranty	$ 24,813	$ 20,397	$ 23,055

Long-Term Indebtedness (Details

Long-Term Indebtedness (Details) - USD ($)	Apr. 27, 2016	Mar. 20, 2015	Feb. 24, 2014	Mar. 31, 2018	Feb. 28, 2018	Jan. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Mar. 30, 2017	Mar. 03, 2015
Line of Credit Facility
Long-term indebtedness				$ 226,242,000			$ 49,924,000	$ 49,905,000
Maximum
Line of Credit Facility
Equity interest percentage	65.00%
Line of Credit
Line of Credit Facility
Debt outstanding at period end				$ 177,000,000			$ 0	0
Debt weighted average interest rate				3.00%
Remaining availability under the facilities				$ 245,600,000
Maximum leverage ratio				2.5
Amended Credit Agreement
Line of Credit Facility
Maximum borrowings under line of credit					$ 325,000,000	$ 200,000,000
JPMorgan Chase Bank And Wells Fargo Bank | Line of Credit
Line of Credit Facility
Maximum borrowings under line of credit									$ 100,000,000	$ 100,000,000
Letters of credit outstanding amount				$ 2,400,000				$ 2,500,000
Remaining availability under the facilities				$ 145,600,000
Prudential Investment Management Inc | Line of Credit
Line of Credit Facility
Remaining availability under the facilities			$ 150,000,000
Long-term indebtedness		$ 50,000,000
Debt Instrument, Term		5 years
Interest rate during period				3.35%
Period after request is issued, by company, for interest payable rate to be determined by Prudential			5 days
JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit
Line of Credit Facility
Maximum borrowings under line of credit	$ 200,000,000
Maximum draw capacity in approved foreign currencies	$ 50,000,000
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR
Line of Credit Facility
Basis spread on variable rate	1.00%
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Minimum
Line of Credit Facility
Debt instrument, additional margin interest rate	0.00%
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum
Line of Credit Facility
Debt instrument, additional margin interest rate	0.625%
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | Federal Funds Effective Rate
Line of Credit Facility
Basis spread on variable rate	0.50%
Option Two | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum
Line of Credit Facility
Basis spread on variable rate	1.625%

Commitments And Contingencies41

Commitments And Contingencies (Narrative) (Details)	1 Months Ended	3 Months Ended
	Jul. 31, 2015	Mar. 31, 2018	Mar. 31, 2017
Loss Contingencies
Percentage of weighted average cost of capital		13.60%	13.70%
Furrion Limited [Member]
Loss Contingencies
Long-term purchase commitment, time period	6 years

Commitments And Contingencies42

Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 12,545	$ 9,241
Acquisitions	0	4,922
Payments	(1,160)	(1,884)
Accretion	337	292
Fair value adjustments	(1,248)	815
Net foreign currency translation adjustment	(151)	0
Balance at end of the period	10,323	13,386
Less current portion in accrued expenses and other current liabilities	(3,785)	(5,797)
Total long-term portion in other long-term liabilities	6,538	$ 7,589
Contingent consideration, total remaining estimated payments	$ 12,400

Stockholders' Equity (Summary O

Stockholders' Equity (Summary Of Common Stock Information) (Details) - shares shares in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Common stock authorized (in shares)	75,000	75,000	75,000
Common stock issued (in shares)	27,898	27,674	27,590
Treasury stock (in shares)	2,684	2,684	2,684

Stockholders' Equity (Schedule

Stockholders' Equity (Schedule Of Computation Of Basic And Diluted Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stockholders' Equity Note [Abstract]
Weighted average shares outstanding for basic earnings per share (in shares)	25,149	24,906
Common stock equivalents pertaining to stock options and deferred stock units (in shares)	316	349
Weighted average shares outstanding for diluted earnings per share (in shares)	25,465	25,255

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2017	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average diluted shares outstanding excludes shares of common stock subject to stock options		447,625	143,270
Deferred stock units issued to executive officers	63,677
Deferred stock units issued to executive officers, aggregate fair value	$ 6.9
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred stock units issued to executive officers, exercise price	$ 108.47

Stockholders' Equity (Summary46

Stockholders' Equity (Summary of Regular Quarterly Dividend) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividend (in usd per share)	$ 0.55	$ 0.55	$ 0.5	$ 0.5	$ 0.5	$ 2.05
Payment of dividends	$ 13,858				$ 12,442
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment of dividends	$ 13,858	$ 13,711	$ 12,459	$ 12,445	$ 12,442	$ 51,057

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) $ in Thousands, lb in Millions	3 Months Ended
	Mar. 31, 2018USD ($)lb$ / lb	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)
Fair Value Disclosures [Abstract]
Number of years long-term sales growth forecasted over	6 years
Average long-term sales growth forecast, over next 4 years, percent per year	12.00%
Combined carrying value	$ 266,596	$ 228,950	$ 178,922
Derivative, Nonmonetary Notional Amount, Mass | lb	9
Underlying, Derivative Mass | $ / lb	0.25
Derivative Asset	$ 1,500
Derivative, Gain (Loss) on Derivative, Net	$ 500

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Unrealized gain on derivative instruments	$ 1,478	$ 930
Liabilities
Contingent consideration	10,323	12,545
Level 1
Assets
Unrealized gain on derivative instruments	0	0
Liabilities
Contingent consideration	0	0
Level 2
Assets
Unrealized gain on derivative instruments	1,478	930
Liabilities
Contingent consideration	0	0
Level 3
Assets
Unrealized gain on derivative instruments	$ 0	0
Liabilities
Contingent consideration		$ 12,545

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Non-Recurring Losses Recognized Using Fair Value Measurements And The Carrying Value Of Any Assets And Liabilities Measured Using Fair Value Estimates) (Details) - Fair Value, Measurements, Nonrecurring - Net assets of acquired businesses - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Assets
Assets, carrying value	$ 117,588	$ 2,650
Assets, non-recurring losses (gains)	$ 0	$ 0

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details) - segment	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information
Number of reportable segments	2
Net sales | OEM Segment
Segment Reporting Information
Concentration risk, percentage	92.00%	92.00%
Net sales | Aftermarket Segment
Segment Reporting Information
Concentration risk, percentage	8.00%	8.00%
Product Concentration Risk | Net sales | Travel trailers and fifth-wheels
Segment Reporting Information
Concentration risk, percentage	67.00%

Segment Reporting (Disaggregati

Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 650,492	$ 498,336
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	600,179	462,029
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	404,957	330,274
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	52,915	37,044
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	142,307	94,711
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	50,313	36,307
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	252,702	222,949
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	149,520	97,200
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	105,518	71,174
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	33,605	32,181
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	58,834	38,525
U.S.
Disaggregation of Revenue [Line Items]
Net sales	627,902	489,574
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	580,556	455,611
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	403,742	329,318
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	43,406	33,762
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	133,408	92,531
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	47,346	33,963
International
Disaggregation of Revenue [Line Items]
Net sales	22,590	8,762
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	19,623	6,418
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	1,215	956
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	9,509	3,282
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	8,899	2,180
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 2,967	$ 2,344

Segment Reporting (Schedule of

Segment Reporting (Schedule of Operating Profit by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information
Operating profit	$ 59,820	$ 59,129
OEM Segment
Segment Reporting Information
Operating profit	53,940	54,397
Aftermarket Segment
Segment Reporting Information
Operating profit	$ 5,880	$ 4,732