LCI Industries (LCII) 10-Q 7 Aug 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
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		25,215,661

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net sales	$ 684,455	$ 547,483	$ 1,334,947	$ 1,045,819
Cost of sales	533,999	416,396	1,043,758	790,718
Gross profit	150,456	131,087	291,189	255,101
Selling, general and administrative expenses	86,368	68,047	167,281	132,932
Operating profit	64,088	63,040	123,908	122,169
Interest expense, net	1,660	414	2,761	851
Income before income taxes	62,428	62,626	121,147	121,318
Provision for income taxes	15,204	22,489	26,587	38,036
Net income	$ 47,224	$ 40,137	$ 94,560	$ 83,282
Net income per common share:
Basic (in usd per share)	$ 1.87	$ 1.61	$ 3.75	$ 3.34
Diluted (in usd per share)	$ 1.86	$ 1.59	$ 3.70	$ 3.29
Weighted average common shares outstanding:
Basic (in shares)	25,233	24,992	25,195	24,959
Diluted (in shares)	25,454	25,305	25,527	25,296

Condensed Consolidated Stateme3

Condensed Consolidated Statement Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 47,224	$ 40,137	$ 94,560	$ 83,282
Other comprehensive (loss) income:
Net foreign currency translation adjustment	(1,900)	2,066	(789)	2,415
Total comprehensive income	$ 45,324	$ 42,203	$ 93,771	$ 85,697

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Current assets
Cash and cash equivalents	$ 17,851	$ 26,049	$ 37,961
Accounts receivable, net of allowances of $2,991, $2,226, and $1,536 at June 30, 2018, June 30, 2017, and December 31, 2017, respectively	163,249	82,157	130,514
Inventories, net	323,893	274,748	202,635
Prepaid expenses and other current assets	43,961	34,125	43,977
Total current assets	548,954	417,079	415,087
Fixed assets, net	282,142	228,950	203,204
Goodwill	151,831	124,183	122,275
Other intangible assets, net	181,426	130,132	138,876
Deferred taxes	17,947	24,156	31,864
Other assets	22,513	21,358	13,344
Total assets	1,204,813	945,858	924,650
Current liabilities
Accounts payable, trade	99,085	79,164	80,596
Accrued expenses and other current liabilities	104,281	102,849	114,454
Total current liabilities	203,366	182,013	195,050
Long-term indebtedness	215,327	49,924	49,911
Other long-term liabilities	72,941	61,176	59,934
Total liabilities	491,634	293,113	304,895
Stockholders’ equity
Common stock, par value $.01 per share	279	277	276
Paid-in capital	200,306	203,990	195,452
Retained earnings	540,411	475,506	452,877
Accumulated other comprehensive income	1,650	2,439	617
Stockholders’ equity before treasury stock	742,646	682,212	649,222
Treasury stock, at cost	(29,467)	(29,467)	(29,467)
Total stockholders’ equity	713,179	652,745	619,755
Total liabilities and stockholders’ equity	$ 1,204,813	$ 945,858	$ 924,650

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 2,991	$ 1,536	$ 2,226
Common stock, par value	$ 0.01	$ 0.01	$ 0.01

Condensed Consolidated Stateme6

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 94,560	$ 83,282
Adjustments to reconcile net income to cash flows provided by operating activities:
Depreciation and amortization	32,476	25,530
Stock-based compensation expense	9,762	9,312
Other non-cash items	(927)	2,198
Changes in assets and liabilities, net of acquisitions of businesses:
Accounts receivable, net	(52,236)	(61,455)
Inventories, net	(14,556)	(6,804)
Prepaid expenses and other assets	(5,743)	(9,337)
Accounts payable, trade	5,412	22,542
Accrued expenses and other liabilities	10,181	31,431
Net cash flows provided by operating activities	78,929	96,699
Cash flows from investing activities:
Capital expenditures	(54,539)	(43,276)
Acquisitions of businesses, net of cash acquired	(153,415)	(67,876)
Proceeds from note receivable	2,000	0
Other investing activities	(1,016)	257
Net cash flows used in investing activities	(206,970)	(110,895)
Cash flows from financing activities:
Exercise of stock-based awards, net of shares tendered for payment of taxes	(14,114)	(7,543)
Proceeds from line of credit borrowings	631,148	0
Repayments under line of credit borrowings	(469,148)	0
Proceeds from other borrowings	4,509	0
Payment of dividends	28,985	24,887
Payment of contingent consideration related to acquisitions	(3,011)	(1,524)
Other financing activities	(556)	(59)
Net cash flows provided by (used in) financing activities	119,843	(34,013)
Net decrease in cash and cash equivalents	(8,198)	(48,209)
Cash and cash equivalents at beginning of period	26,049	86,170
Cash and cash equivalents at end of period	17,851	37,961
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	2,582	941
Cash paid during the period for income taxes, net of refunds	24,907	17,620
Purchase of property and equipment in accrued expenses	$ 664	$ 2,072

Condensed Consolidated Stateme7

Condensed Consolidated Statement Of Stockholders' Equity - 6 months ended Jun. 30, 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	94,560			94,560
Issuance of 226,187 shares of common stock pursuant to stock-based awards, net of shares tendered for payment of taxes	(14,114)	2	(14,116)
Stock-based compensation expense	9,762		9,762
Other comprehensive loss					(789)
Cash dividends ($1.15 per share)	(28,985)			(28,985)
Dividend equivalents on stock-based awards			670	(670)
Ending balance at Jun. 30, 2018	$ 713,179	$ 279	$ 200,306	$ 540,411	$ 1,650	$ (29,467)

Condensed Consolidated Stateme8

Condensed Consolidated Statement Of Stockholders' Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares) | shares	226,187
Special cash dividend (in usd per share) | $ / shares	$ 1.15

Basis Of Presentation

Basis Of Presentation	6 Months Ended
	Jun. 30, 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 engineered components for the leading original equipment manufacturers (“OEMs”) in the recreation and industrial product markets, consisting 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 June 30, 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	6 Months Ended
	Jun. 30, 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 execute on its implementation plan and is currently gathering lease data to derive the impact 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. The Company does not expect the adoption to have a material impact to its consolidated statement of cash flows or consolidated statement of income. Recently adopted accounting pronouncements 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 six months ended June 30, 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	6 Months Ended
	Jun. 30, 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 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 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 has 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	6 Months Ended
	Jun. 30, 2018
Acquisitions, Goodwill And Other Intangible Assets [Abstract]
Goodwill And Other Intangible Assets	ACQUISITIONS, GOODWILL AND OTHER INTANGIBLE ASSETS Acquisitions During the Six Months Ended June 30, 2018 STLA In June 2018, the Company acquired 100 percent of the equity interests of ST.LA. S.R.L., (“STLA”), a manufacturer of bed lifts and other RV components for the European caravan market, headquartered in Pontedera, Italy. The preliminary purchase price was $14.8 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 $ 14,845 Customer relationships and other identifiable intangible assets $ 7,000 Net tangible assets 2,280 Total fair value of net assets acquired $ 9,280 Goodwill (not tax deductible) $ 5,565 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. 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 17,355 Total fair value of net assets acquired $ 42,855 Goodwill (tax deductible) $ 7,270 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 Six Months Ended June 30, 2017 Metallarte S.r.l. In June 2017, the Company acquired 100 percent of the equity interests of Metallarte S.r.l. (“Metallarte”), a manufacturer of entry and compartment doors for the European caravan market located near Siena, Italy, and its subsidiary, RV Doors, S.r.l., a manufacturer of driver-side doors located near Venice, Italy. The purchase price was $14.1 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 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 $ 13,501 Contingent consideration 2,366 Total fair value of consideration given $ 15,867 Customer relationships $ 7,311 Other identifiable intangible assets 1,942 Net other liabilities (327 ) Total fair value of net assets acquired $ 8,926 Goodwill (not tax deductible) $ 6,941 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. Lexington In May 2017, the Company acquired the business and certain assets of Lexington LLC (“Lexington”), a manufacturer of high quality seating solutions for the marine, RV, transportation, medical and office furniture industries located in Elkhart, Indiana. The purchase price was $40.1 million paid at closing. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the 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 $ 40,062 Customer relationships $ 16,900 Other identifiable intangible assets 1,820 Net tangible assets 4,928 Total fair value of net assets acquired $ 23,648 Goodwill (tax deductible) $ 16,414 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. 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 $6.5 million paid at closing, net of cash acquired, 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 23,921 3,226 27,147 Other 501 — 501 Net balance – June 30, 2018 $ 134,063 $ 17,768 $ 151,831 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. Any change in the goodwill amounts resulting from foreign currency translations and purchase accounting adjustments are presented as “Other” in the above table. Other Intangible Assets Other intangible assets consisted of the following at June 30, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 191,533 $ 49,131 $ 142,402 6 to 16 Patents 59,102 40,351 18,751 3 to 19 Trade names 16,440 5,715 10,725 3 to 15 Non-compete agreements 8,261 3,584 4,677 3 to 6 Other 309 125 184 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 280,332 $ 98,906 $ 181,426 Other intangible assets consisted of the following at June 30, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,258 $ 37,190 $ 101,068 6 to 16 Patents 57,202 35,874 21,328 3 to 19 Trade names 10,337 4,068 6,269 3 to 15 Non-compete agreements 8,354 3,046 5,308 3 to 6 Other 309 93 216 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 219,147 $ 80,271 $ 138,876 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 Six Months Ended June 30, 2018 STLA In June 2018, the Company acquired 100 percent of the equity interests of ST.LA. S.R.L., (“STLA”), a manufacturer of bed lifts and other RV components for the European caravan market, headquartered in Pontedera, Italy. The preliminary purchase price was $14.8 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 $ 14,845 Customer relationships and other identifiable intangible assets $ 7,000 Net tangible assets 2,280 Total fair value of net assets acquired $ 9,280 Goodwill (not tax deductible) $ 5,565 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. 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 17,355 Total fair value of net assets acquired $ 42,855 Goodwill (tax deductible) $ 7,270 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 Six Months Ended June 30, 2017 Metallarte S.r.l. In June 2017, the Company acquired 100 percent of the equity interests of Metallarte S.r.l. (“Metallarte”), a manufacturer of entry and compartment doors for the European caravan market located near Siena, Italy, and its subsidiary, RV Doors, S.r.l., a manufacturer of driver-side doors located near Venice, Italy. The purchase price was $14.1 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 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 $ 13,501 Contingent consideration 2,366 Total fair value of consideration given $ 15,867 Customer relationships $ 7,311 Other identifiable intangible assets 1,942 Net other liabilities (327 ) Total fair value of net assets acquired $ 8,926 Goodwill (not tax deductible) $ 6,941 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. Lexington In May 2017, the Company acquired the business and certain assets of Lexington LLC (“Lexington”), a manufacturer of high quality seating solutions for the marine, RV, transportation, medical and office furniture industries located in Elkhart, Indiana. The purchase price was $40.1 million paid at closing. The results of the acquired business have been included primarily in the Company’s OEM Segment and in the 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 $ 40,062 Customer relationships $ 16,900 Other identifiable intangible assets 1,820 Net tangible assets 4,928 Total fair value of net assets acquired $ 23,648 Goodwill (tax deductible) $ 16,414 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. 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 $6.5 million paid at closing, net of cash acquired, 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 23,921 3,226 27,147 Other 501 — 501 Net balance – June 30, 2018 $ 134,063 $ 17,768 $ 151,831 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. Any change in the goodwill amounts resulting from foreign currency translations and purchase accounting adjustments are presented as “Other” in the above table. Other Intangible Assets Other intangible assets consisted of the following at June 30, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 191,533 $ 49,131 $ 142,402 6 to 16 Patents 59,102 40,351 18,751 3 to 19 Trade names 16,440 5,715 10,725 3 to 15 Non-compete agreements 8,261 3,584 4,677 3 to 6 Other 309 125 184 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 280,332 $ 98,906 $ 181,426 Other intangible assets consisted of the following at June 30, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,258 $ 37,190 $ 101,068 6 to 16 Patents 57,202 35,874 21,328 3 to 19 Trade names 10,337 4,068 6,269 3 to 15 Non-compete agreements 8,354 3,046 5,308 3 to 6 Other 309 93 216 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 219,147 $ 80,271 $ 138,876 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	6 Months Ended
	Jun. 30, 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: June 30, December 31, (In thousands) 2018 2017 2017 Raw materials $ 276,424 $ 164,964 $ 233,187 Work in process 12,490 10,358 10,408 Finished goods 34,979 27,313 31,153 Inventories, net $ 323,893 $ 202,635 $ 274,748

Fixed Assets

Fixed Assets	6 Months Ended
	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Fixed Assets	FIXED ASSETS Fixed assets consisted of the following at: June 30, December 31, (In thousands) 2018 2017 2017 Fixed assets, at cost $ 496,701 $ 381,650 $ 424,056 Less accumulated depreciation and amortization 214,559 178,446 195,106 Fixed assets, net $ 282,142 $ 203,204 $ 228,950

Accrued Expenses And Other Curr

Accrued Expenses And Other Current Liabilities	6 Months Ended
	Jun. 30, 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: June 30, December 31, (In thousands) 2018 2017 2017 Employee compensation and benefits $ 34,230 $ 36,861 $ 39,365 Current portion of accrued warranty 25,319 21,705 23,055 Income taxes payable 2,591 19,235 3,561 Customer rebates 12,063 11,397 11,124 Other 30,078 25,256 25,744 Accrued expenses and other current liabilities $ 104,281 $ 114,454 $ 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 six months ended June 30 : (In thousands) 2018 2017 Balance at beginning of period $ 38,502 $ 32,393 Provision for warranty expense 16,132 11,833 Warranty liability from acquired businesses 482 150 Warranty costs paid (11,510 ) (9,079 ) Balance at end of period 43,606 35,297 Less long-term portion 18,287 13,592 Current portion of accrued warranty $ 25,319 $ 21,705

Long-Term Indebtedness

Long-Term Indebtedness	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Long-Term Indebtedness	LONG-TERM INDEBTEDNESS Long-term debt consisted of the following at: June 30, December 31, (In thousands) 2018 2017 2017 Line of Credit $ 161,999 $ — $ — Shelf Loan 50,000 50,000 50,000 Other 4,509 — — Unamortized deferred financing fees (707 ) (89 ) (76 ) 215,801 49,911 49,924 Less current portion (474 ) — — Long-term debt $ 215,327 $ 49,911 $ 49,924 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 June 30, 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 June 30, 2018 ) depending on the Company’s performance and financial condition. At June 30, 2018 , the line of credit had a weighted average interest rate of 3.0 percent . At June 30, 2018 and 2017 , the Company had $2.4 million in issued, but undrawn, standby letters of credit under the line of credit. Availability under the Company’s line of credit was $160.6 million at June 30, 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 June 30, 2018 . 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 June 30, 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 June 30, 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 June 30, 2018 . The remaining availability under these facilities was $260.6 million at June 30, 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. At June 30, 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.

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 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 June 30, 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 12.4 percent and 13.6 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 six months ended June 30 : (In thousands) 2018 2017 Balance at beginning of period $ 12,545 $ 9,241 Acquisitions — 7,288 Payments (4,870 ) (2,569 ) Accretion (a) 536 716 Fair value adjustments (a) (1,081 ) 1,137 Net foreign currency translation adjustment (135 ) 353 Balance at end of the period (b) 6,995 16,166 Less current portion in accrued expenses and other current liabilities (47 ) (6,263 ) Total long-term portion in other long-term liabilities $ 6,948 $ 9,903 (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 June 30, 2018 are $8.9 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 June 30, 2018 , would not be material to the Company’s financial position or annual results of operations.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY The following table summarizes information about shares of the Company’s common stock at: June 30, December 31, (In thousands) 2018 2017 2017 Common stock authorized 75,000 75,000 75,000 Common stock issued 27,900 27,610 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: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 Weighted average shares outstanding for basic earnings per share 25,195 24,959 25,233 24,992 Common stock equivalents pertaining to stock-based awards 332 337 221 313 Weighted average shares outstanding for diluted earnings per share 25,527 25,296 25,454 25,305 The weighted average diluted shares outstanding for the six months ended June 30, 2018 and 2017 , exclude the effect of 463,479 and 143,658 shares of common stock, respectively, subject to stock-based awards. The weighted average diluted shares outstanding for the three months ended June 30, 2018 and 2017 , exclude the effect of 463,711 and 144,046 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 June 30, 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 Second Quarter 2018 0.60 06/04/18 06/15/18 15,127 Total 2018 $ 1.15 $ 28,985 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	6 Months Ended
	Jun. 30, 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: June 30, 2018 December 31, 2017 (In thousands) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Derivative instruments $ 1,272 $ — $ 1,272 $ — $ 930 $ — $ 930 $ — Liabilities Contingent consideration $ 6,995 $ — $ — $ 6,995 $ 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 11 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 June 30, 2018 , the Company had derivative instruments for 6.0 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 June 30, 2018 , the $1.3 million corresponding asset was recorded in other current assets as reflected in the Condensed Consolidated Balance Sheets. A net gain of $0.3 million was recorded in selling, general and administrative expenses in the Condensed Consolidated Statements of Income during the six months ended June 30, 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 six months ended June 30 : 2018 2017 (In thousands) Carrying Non-Recurring Carrying Non-Recurring Assets Net assets of acquired businesses 126,268 — 35,224 — 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	6 Months Ended
	Jun. 30, 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 91 percent and 92 percent of consolidated net sales for the six months ended June 30, 2018 and 2017 , respectively, manufactures or distributes a broad array of engineered products for the leading OEMs in the leisure and mobile transportation markets, consisting 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 66 percent of the Company’s OEM Segment net sales for the six months ended June 30, 2018 were of components for travel trailer and fifth-wheel RVs. The Aftermarket Segment, which accounted for nine percent and eight percent of consolidated net sales for the six month periods ended June 30, 2018 and 2017 , respectively, supplies components to the related aftermarket channels of the leisure and mobile transportation 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: Six Months Ended June 30, 2018 Six Months Ended June 30, 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 $ 801,253 $ 3,168 $ 804,421 $ 686,007 $ 1,518 $ 687,525 Motorhomes 80,959 21,027 101,986 66,503 6,789 73,292 Adjacent industries OEMs 292,288 18,402 310,690 198,921 5,066 203,987 Total OEM Segment net sales 1,174,500 42,597 1,217,097 951,431 13,373 964,804 Aftermarket Segment: Total Aftermarket Segment net sales 111,775 6,075 117,850 75,971 5,044 81,015 Total net sales $ 1,286,275 $ 48,672 $ 1,334,947 $ 1,027,402 $ 18,417 $ 1,045,819 Three Months Ended June 30, 2018 Three Months Ended June 30, 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 $ 397,511 $ 1,953 $ 399,464 $ 356,689 $ 562 $ 357,251 Motorhomes 37,553 11,518 49,071 32,741 3,507 36,248 Adjacent industries OEMs 158,880 9,503 168,383 106,388 2,888 109,276 Total OEM Segment net sales 593,944 22,974 616,918 495,818 6,957 502,775 Aftermarket Segment: Total Aftermarket Segment net sales 64,429 3,108 67,537 42,010 2,698 44,708 Total net sales $ 658,373 $ 26,082 $ 684,455 $ 537,828 $ 9,655 $ 547,483 (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: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 Operating profit: OEM Segment $ 107,531 $ 110,842 $ 53,591 $ 56,445 Aftermarket Segment 16,377 11,327 10,497 6,595 Total operating profit $ 123,908 $ 122,169 $ 64,088 $ 63,040 The following table presents the Company’s revenue disaggregated by product: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 OEM Segment: Chassis, chassis parts and slide-out mechanisms $ 500,514 $ 458,465 $ 247,811 $ 235,516 Windows and doors 318,892 206,593 169,372 109,393 Furniture and mattresses 210,796 153,914 105,278 82,740 Axles and suspension solutions 66,753 64,540 33,148 32,359 Other 120,142 81,292 61,309 42,767 Total OEM Segment net sales 1,217,097 964,804 616,918 502,775 Total Aftermarket Segment net sales 117,850 81,015 67,537 44,708 Total net sales $ 1,334,947 $ 1,045,819 $ 684,455 $ 547,483

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 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 execute on its implementation plan and is currently gathering lease data to derive the impact 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. The Company does not expect the adoption to have a material impact to its consolidated statement of cash flows or consolidated statement of income. Recently adopted accounting pronouncements 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 six months ended June 30, 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 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 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 has 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)	6 Months Ended
	Jun. 30, 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 23,921 3,226 27,147 Other 501 — 501 Net balance – June 30, 2018 $ 134,063 $ 17,768 $ 151,831
Schedule of Other Intangible Assets	Other intangible assets consisted of the following at June 30, 2018 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 191,533 $ 49,131 $ 142,402 6 to 16 Patents 59,102 40,351 18,751 3 to 19 Trade names 16,440 5,715 10,725 3 to 15 Non-compete agreements 8,261 3,584 4,677 3 to 6 Other 309 125 184 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 280,332 $ 98,906 $ 181,426 Other intangible assets consisted of the following at June 30, 2017 : (In thousands) Gross Accumulated Net Estimated Useful Customer relationships $ 138,258 $ 37,190 $ 101,068 6 to 16 Patents 57,202 35,874 21,328 3 to 19 Trade names 10,337 4,068 6,269 3 to 15 Non-compete agreements 8,354 3,046 5,308 3 to 6 Other 309 93 216 2 to 12 Purchased research and development 4,687 — 4,687 Indefinite Other intangible assets $ 219,147 $ 80,271 $ 138,876 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
STLA
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 $ 14,845 Customer relationships and other identifiable intangible assets $ 7,000 Net tangible assets 2,280 Total fair value of net assets acquired $ 9,280 Goodwill (not tax deductible) $ 5,565
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 17,355 Total fair value of net assets acquired $ 42,855 Goodwill (tax deductible) $ 7,270
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
Metallarte S.r.l.
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 $ 13,501 Contingent consideration 2,366 Total fair value of consideration given $ 15,867 Customer relationships $ 7,311 Other identifiable intangible assets 1,942 Net other liabilities (327 ) Total fair value of net assets acquired $ 8,926 Goodwill (not tax deductible) $ 6,941
Lexington
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 $ 40,062 Customer relationships $ 16,900 Other identifiable intangible assets 1,820 Net tangible assets 4,928 Total fair value of net assets acquired $ 23,648 Goodwill (tax deductible) $ 16,414
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)	6 Months Ended
	Jun. 30, 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: June 30, December 31, (In thousands) 2018 2017 2017 Raw materials $ 276,424 $ 164,964 $ 233,187 Work in process 12,490 10,358 10,408 Finished goods 34,979 27,313 31,153 Inventories, net $ 323,893 $ 202,635 $ 274,748

Fixed Assets (Tables)

Fixed Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Schedule Of Fixed Assets	Fixed assets consisted of the following at: June 30, December 31, (In thousands) 2018 2017 2017 Fixed assets, at cost $ 496,701 $ 381,650 $ 424,056 Less accumulated depreciation and amortization 214,559 178,446 195,106 Fixed assets, net $ 282,142 $ 203,204 $ 228,950

Accrued Expenses And Other Cu25

Accrued Expenses And Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2018
Payables and Accruals [Abstract]
Schedule Of Accrued Expenses And Other Current Liabilities	Accrued expenses and other current liabilities consisted of the following at: June 30, December 31, (In thousands) 2018 2017 2017 Employee compensation and benefits $ 34,230 $ 36,861 $ 39,365 Current portion of accrued warranty 25,319 21,705 23,055 Income taxes payable 2,591 19,235 3,561 Customer rebates 12,063 11,397 11,124 Other 30,078 25,256 25,744 Accrued expenses and other current liabilities $ 104,281 $ 114,454 $ 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 six months ended June 30 : (In thousands) 2018 2017 Balance at beginning of period $ 38,502 $ 32,393 Provision for warranty expense 16,132 11,833 Warranty liability from acquired businesses 482 150 Warranty costs paid (11,510 ) (9,079 ) Balance at end of period 43,606 35,297 Less long-term portion 18,287 13,592 Current portion of accrued warranty $ 25,319 $ 21,705

Long-Term Indebtedness (Tables)

Long-Term Indebtedness (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consisted of the following at: June 30, December 31, (In thousands) 2018 2017 2017 Line of Credit $ 161,999 $ — $ — Shelf Loan 50,000 50,000 50,000 Other 4,509 — — Unamortized deferred financing fees (707 ) (89 ) (76 ) 215,801 49,911 49,924 Less current portion (474 ) — — Long-term debt $ 215,327 $ 49,911 $ 49,924

Commitments And Contingencies (

Commitments And Contingencies (Tables)	6 Months Ended
	Jun. 30, 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 six months ended June 30 : (In thousands) 2018 2017 Balance at beginning of period $ 12,545 $ 9,241 Acquisitions — 7,288 Payments (4,870 ) (2,569 ) Accretion (a) 536 716 Fair value adjustments (a) (1,081 ) 1,137 Net foreign currency translation adjustment (135 ) 353 Balance at end of the period (b) 6,995 16,166 Less current portion in accrued expenses and other current liabilities (47 ) (6,263 ) Total long-term portion in other long-term liabilities $ 6,948 $ 9,903 (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 June 30, 2018 are $8.9 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)	6 Months Ended
	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Summary Of Common Stock Information	The following table summarizes information about shares of the Company’s common stock at: June 30, December 31, (In thousands) 2018 2017 2017 Common stock authorized 75,000 75,000 75,000 Common stock issued 27,900 27,610 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: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 Weighted average shares outstanding for basic earnings per share 25,195 24,959 25,233 24,992 Common stock equivalents pertaining to stock-based awards 332 337 221 313 Weighted average shares outstanding for diluted earnings per share 25,527 25,296 25,454 25,305
Schedule of Dividends Declared	The table below summarizes the regular quarterly dividends declared and paid during the periods ended June 30, 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 Second Quarter 2018 0.60 06/04/18 06/15/18 15,127 Total 2018 $ 1.15 $ 28,985

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 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: June 30, 2018 December 31, 2017 (In thousands) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Assets Derivative instruments $ 1,272 $ — $ 1,272 $ — $ 930 $ — $ 930 $ — Liabilities Contingent consideration $ 6,995 $ — $ — $ 6,995 $ 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 six months ended June 30 : 2018 2017 (In thousands) Carrying Non-Recurring Carrying Non-Recurring Assets Net assets of acquired businesses 126,268 — 35,224 —

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 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: Six Months Ended June 30, 2018 Six Months Ended June 30, 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 $ 801,253 $ 3,168 $ 804,421 $ 686,007 $ 1,518 $ 687,525 Motorhomes 80,959 21,027 101,986 66,503 6,789 73,292 Adjacent industries OEMs 292,288 18,402 310,690 198,921 5,066 203,987 Total OEM Segment net sales 1,174,500 42,597 1,217,097 951,431 13,373 964,804 Aftermarket Segment: Total Aftermarket Segment net sales 111,775 6,075 117,850 75,971 5,044 81,015 Total net sales $ 1,286,275 $ 48,672 $ 1,334,947 $ 1,027,402 $ 18,417 $ 1,045,819 Three Months Ended June 30, 2018 Three Months Ended June 30, 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 $ 397,511 $ 1,953 $ 399,464 $ 356,689 $ 562 $ 357,251 Motorhomes 37,553 11,518 49,071 32,741 3,507 36,248 Adjacent industries OEMs 158,880 9,503 168,383 106,388 2,888 109,276 Total OEM Segment net sales 593,944 22,974 616,918 495,818 6,957 502,775 Aftermarket Segment: Total Aftermarket Segment net sales 64,429 3,108 67,537 42,010 2,698 44,708 Total net sales $ 658,373 $ 26,082 $ 684,455 $ 537,828 $ 9,655 $ 547,483 (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: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 OEM Segment: Chassis, chassis parts and slide-out mechanisms $ 500,514 $ 458,465 $ 247,811 $ 235,516 Windows and doors 318,892 206,593 169,372 109,393 Furniture and mattresses 210,796 153,914 105,278 82,740 Axles and suspension solutions 66,753 64,540 33,148 32,359 Other 120,142 81,292 61,309 42,767 Total OEM Segment net sales 1,217,097 964,804 616,918 502,775 Total Aftermarket Segment net sales 117,850 81,015 67,537 44,708 Total net sales $ 1,334,947 $ 1,045,819 $ 684,455 $ 547,483
Schedule Of Information Relating To Segments	The following table presents the Company’s operating profit by segment: Six Months Ended Three Months Ended (In thousands) 2018 2017 2018 2017 Operating profit: OEM Segment $ 107,531 $ 110,842 $ 53,591 $ 56,445 Aftermarket Segment 16,377 11,327 10,497 6,595 Total operating profit $ 123,908 $ 122,169 $ 64,088 $ 63,040

Basis of Presentation (Details)

Basis of Presentation (Details)	Jun. 30, 2018
Manufacturing Facility
Property, Plant and Equipment
Manufacturing Facilities	65

Summary of Significant Accoun32

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease of cash outflow from financing activities	$ 119,843	$ (34,013)
Increase of cash outflow from operating activities	$ (78,929)	(96,699)
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 Ot33

Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Feb. 01, 2017	Jun. 30, 2018	Feb. 28, 2018	Jan. 31, 2018	Jun. 30, 2017	May 31, 2017	Feb. 28, 2017	Jun. 30, 2018
Business Acquisition [Line Items]
Change in goodwill									$ 501
STLA
Business Acquisition [Line Items]
Percentage of interests acquired			100.00%						100.00%
Cash consideration			$ 14,845
STLA | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life			15 years
Hehr
Business Acquisition [Line Items]
Cash consideration				$ 50,125
Hehr | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life				15 years
Metallarte S.r.l.
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%					100.00%
Cash consideration						$ 14,100
Total purchase price	$ 15,867
Metallarte S.r.l. | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life						15 years
Taylor Made
Business Acquisition [Line Items]
Percentage of interests acquired					100.00%
Cash consideration					$ 88,445
Taylor Made | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life					15 years
Lexington
Business Acquisition [Line Items]
Cash consideration							$ 40,062
Total purchase price							$ 40,100
Lexington | Customer Relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life							15 years
SessaKlein S.p.A.
Business Acquisition [Line Items]
Percentage of interests acquired								100.00%
Total purchase price		$ 10,340						$ 6,500

Acquisitions, Goodwill And Ot34

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Business Acquisitions) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Feb. 01, 2017	Jun. 30, 2018	Feb. 28, 2018	Jan. 31, 2018	Jun. 30, 2017	May 31, 2017	Feb. 28, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	May 01, 2017
Business Acquisition [Line Items]
Cash consideration net of cash acquired									$ 153,415	$ 67,876
Goodwill	$ 122,275		$ 151,831			$ 122,275			$ 151,831	$ 122,275	$ 124,183
STLA
Business Acquisition [Line Items]
Percentage of interests acquired			100.00%						100.00%
Cash consideration			$ 14,845
Identifiable intangible assets			7,000						$ 7,000
Net tangible assets			2,280						2,280
Total fair value of net assets acquired			9,280						9,280
Goodwill			$ 5,565						$ 5,565
Hehr
Business Acquisition [Line Items]
Cash consideration				$ 50,125
Identifiable intangible assets				25,500
Net tangible assets				17,355
Total fair value of net assets acquired				42,855
Goodwill				$ 7,270
Metallarte S.r.l.
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%					100.00%				100.00%
Cash consideration						$ 14,100
Cash consideration net of cash acquired	$ 13,501
Contingent consideration	2,366
Total fair value of consideration given	15,867
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Other Liabilities	(327)					(327)				$ (327)
Total fair value of net assets acquired	8,926					8,926				8,926
Goodwill	6,941					6,941				6,941
Taylor Made
Business Acquisition [Line Items]
Percentage of interests acquired					100.00%
Cash consideration					$ 88,445
Net tangible assets					42,133
Total fair value of net assets acquired					74,133
Goodwill					14,312
Lexington
Business Acquisition [Line Items]
Cash consideration							$ 40,062
Total fair value of consideration given							$ 40,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Other Liabilities												$ 4,928
Total fair value of net assets acquired												23,648
Goodwill												16,414
SessaKlein S.p.A.
Business Acquisition [Line Items]
Percentage of interests acquired								100.00%
Cash consideration net of cash acquired		$ 6,502
Contingent consideration		3,838
Total fair value of consideration given		$ 10,340						$ 6,500
Identifiable intangible assets								2,286
Net tangible assets								364
Total fair value of net assets acquired								2,650
Goodwill								$ 7,690
Customer Relationships | Metallarte S.r.l.
Business Acquisition [Line Items]
Identifiable intangible assets	7,311					7,311				7,311
Customer Relationships | Taylor Made
Business Acquisition [Line Items]
Identifiable intangible assets					25,000
Customer Relationships | Lexington
Business Acquisition [Line Items]
Identifiable intangible assets												16,900
Other Intangible Assets | Metallarte S.r.l.
Business Acquisition [Line Items]
Identifiable intangible assets	$ 1,942					$ 1,942				$ 1,942
Other Intangible Assets | Taylor Made
Business Acquisition [Line Items]
Identifiable intangible assets					$ 7,000
Other Intangible Assets | Lexington
Business Acquisition [Line Items]
Identifiable intangible assets												$ 1,820

Acquisitions, Goodwill And Ot35

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Goodwill By Reportable Segment) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Segment Reporting Information
Net balance – December 31, 2017	$ 124,183
Acquisitions – 2018	27,147
Other	501
Net balance – June 30, 2018	151,831
OEM Segment
Segment Reporting Information
Net balance – December 31, 2017	109,641
Acquisitions – 2018	23,921
Other	501
Net balance – June 30, 2018	134,063
Aftermarket Segment
Segment Reporting Information
Net balance – December 31, 2017	14,542
Acquisitions – 2018	3,226
Other	0
Net balance – June 30, 2018	$ 17,768

Acquisitions, Goodwill And Ot36

Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Acquired Intangible Assets
Finite-Lived Intangible Assets, Accumulated Amortization	$ 98,906	$ 80,271	$ 90,658
Intangible Assets, Gross (Excluding Goodwill)	280,332	219,147	220,790
Intangible Assets, Net (Excluding Goodwill)	181,426	138,876	130,132
Customer Relationships
Acquired Intangible Assets
Finite-Lived Intangible Assets, Gross	191,533	138,258	138,687
Finite-Lived Intangible Assets, Accumulated Amortization	49,131	37,190	42,276
Finite-Lived Intangible Assets, Net	$ 142,402	$ 101,068	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	$ 59,102	$ 57,202	57,576
Finite-Lived Intangible Assets, Accumulated Amortization	40,351	35,874	38,764
Finite-Lived Intangible Assets, Net	$ 18,751	$ 21,328	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	$ 16,440	$ 10,337	10,995
Finite-Lived Intangible Assets, Accumulated Amortization	5,715	4,068	5,381
Finite-Lived Intangible Assets, Net	$ 10,725	$ 6,269	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	$ 8,261	$ 8,354	8,536
Finite-Lived Intangible Assets, Accumulated Amortization	3,584	3,046	4,128
Finite-Lived Intangible Assets, Net	$ 4,677	$ 5,308	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	125	93	109
Finite-Lived Intangible Assets, Net	$ 184	$ 216	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	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 276,424	$ 233,187	$ 164,964
Work in process	12,490	10,408	10,358
Finished goods	34,979	31,153	27,313
Inventories, net	$ 323,893	$ 274,748	$ 202,635

Fixed Assets (Schedule Of Fixed

Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Fixed assets, at cost	$ 496,701	$ 424,056	$ 381,650
Less accumulated depreciation and amortization	214,559	195,106	178,446
Fixed assets, net	$ 282,142	$ 228,950	$ 203,204

Accrued Expenses And Other Cu39

Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 34,230	$ 39,365	$ 36,861
Current portion of accrued warranty	25,319	23,055	21,705
Income taxes payable	2,591	3,561	19,235
Customer rebates	12,063	11,124	11,397
Other	30,078	25,744	25,256
Accrued expenses and other current liabilities	$ 104,281	$ 102,849	$ 114,454

Accrued Expenses And Other Cu40

Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 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	16,132	11,833
Warranty liability from acquired businesses	482	150
Warranty costs paid	(11,510)	(9,079)
Balance at end of period	43,606	35,297
Less long-term portion	18,287	13,592
Current portion of accrued warranty	$ 25,319	$ 21,705	$ 23,055

Long-Term Indebtedness (Schedul

Long-Term Indebtedness (Schedule of Long-term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Debt Instrument [Line Items]
Unamortized deferred financing fees	$ (707)	$ (76)	$ (89)
Long-term debt	215,801	49,924	49,911
Less current portion	(474)	0	0
Long-term debt, excluding current maturities	215,327	49,924	49,911
Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	161,999	0	0
Shelf Loan
Debt Instrument [Line Items]
Long-term debt, gross	50,000	50,000	50,000
Other
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,509	$ 0	$ 0

Long-Term Indebtedness (Narrati

Long-Term Indebtedness (Narrative) (Details) - USD ($)	Apr. 27, 2016	Mar. 20, 2015	Feb. 24, 2014	Jun. 30, 2018	Feb. 28, 2018	Jan. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 30, 2017	Mar. 03, 2015
Line of Credit Facility
Long-term indebtedness				$ 215,327,000			$ 49,924,000	$ 49,911,000
Maximum
Line of Credit Facility
Equity interest percentage	65.00%
Line of Credit
Line of Credit Facility
Debt weighted average interest rate				3.00%
Remaining availability under the facilities				$ 260,600,000
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
Remaining availability under the facilities				$ 160,600,000
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 Contingencies43

Commitments And Contingencies (Narrative) (Details)	1 Months Ended	3 Months Ended
	Jul. 31, 2015	Jun. 30, 2018	Jun. 30, 2017
Loss Contingencies
Percentage of weighted average cost of capital		12.40%	13.60%
Furrion Limited [Member]
Loss Contingencies
Long-term purchase commitment, time period	6 years

Commitments And Contingencies44

Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period	$ 12,545	$ 9,241
Acquisitions	0	7,288
Payments	(4,870)	(2,569)
Accretion	536	716
Fair value adjustments	(1,081)	1,137
Net foreign currency translation adjustment	(135)	353
Balance at end of the period	6,995	16,166
Less current portion in accrued expenses and other current liabilities	(47)	(6,263)
Total long-term portion in other long-term liabilities	6,948	$ 9,903
Contingent consideration, total remaining estimated payments	$ 8,900

Stockholders' Equity (Summary O

Stockholders' Equity (Summary Of Common Stock Information) (Details) - shares shares in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
Common stock authorized (in shares)	75,000	75,000	75,000
Common stock issued (in shares)	27,900	27,674	27,610
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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
Weighted average shares outstanding for basic earnings per share (in shares)	25,233	24,992	25,195	24,959
Common stock equivalents pertaining to stock options and deferred stock units (in shares)	221	313	332	337
Weighted average shares outstanding for diluted earnings per share (in shares)	25,454	25,305	25,527	25,296

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 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		463,711	144,046	463,479	143,658
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 (Summary48

Stockholders' Equity (Summary of Regular Quarterly Dividend) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended		12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividend (in usd per share)	$ 0.6	$ 0.55	$ 0.55	$ 0.5	$ 0.5	$ 0.5	$ 1.15		$ 2.05
Payment of dividends							$ 28,985	$ 24,887
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payment of dividends	$ 15,127	$ 13,858	$ 13,711	$ 12,459	$ 12,445	$ 12,442	$ 28,985		$ 51,057

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) $ in Thousands, lb in Millions	6 Months Ended
	Jun. 30, 2018USD ($)lb$ / lb	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)
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	11.00%
Combined carrying value	$ 282,142	$ 228,950	$ 203,204
Derivative, Nonmonetary Notional Amount, Mass | lb	6
Underlying, Derivative Mass | $ / lb	0.25
Derivative Asset	$ 1,300
Derivative, Gain (Loss) on Derivative, Net	$ 300

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Derivative instruments	$ 1,272	$ 930
Liabilities
Contingent consideration	6,995	12,545
Level 1
Assets
Derivative instruments	0	0
Liabilities
Contingent consideration	0	0
Level 2
Assets
Derivative instruments	1,272	930
Liabilities
Contingent consideration	0	0
Level 3
Assets
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	Jun. 30, 2018	Jun. 30, 2017
Assets
Assets, carrying value	$ 126,268	$ 35,224
Assets, non-recurring losses (gains)	$ 0	$ 0

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details) - segment	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information
Number of reportable segments	2
Net sales | OEM Segment
Segment Reporting Information
Concentration risk, percentage	91.00%	92.00%
Net sales | Aftermarket Segment
Segment Reporting Information
Concentration risk, percentage	9.00%	8.00%
Product Concentration Risk | Net sales | Travel trailers and fifth-wheels
Segment Reporting Information
Concentration risk, percentage	66.00%

Segment Reporting (Disaggregati

Segment Reporting (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 684,455	$ 547,483	$ 1,334,947	$ 1,045,819
OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	616,918	502,775	1,217,097	964,804
Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	399,464	357,251	804,421	687,525
Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	49,071	36,248	101,986	73,292
Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	168,383	109,276	310,690	203,987
Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	67,537	44,708	117,850	81,015
Chassis, chassis parts and slide-out mechanisms | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	247,811	235,516	500,514	458,465
Windows and doors | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	169,372	109,393	318,892	206,593
Furniture and mattresses | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	105,278	82,740	210,796	153,914
Axles and suspension solutions | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	33,148	32,359	66,753	64,540
Other | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	61,309	42,767	120,142	81,292
U.S.
Disaggregation of Revenue [Line Items]
Net sales	658,373	537,828	1,286,275	1,027,402
U.S. | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	593,944	495,818	1,174,500	951,431
U.S. | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	397,511	356,689	801,253	686,007
U.S. | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	37,553	32,741	80,959	66,503
U.S. | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	158,880	106,388	292,288	198,921
U.S. | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	64,429	42,010	111,775	75,971
International
Disaggregation of Revenue [Line Items]
Net sales	26,082	9,655	48,672	18,417
International | OEM Segment
Disaggregation of Revenue [Line Items]
Net sales	22,974	6,957	42,597	13,373
International | Travel trailers and fifth-wheels
Disaggregation of Revenue [Line Items]
Net sales	1,953	562	3,168	1,518
International | Motorhomes
Disaggregation of Revenue [Line Items]
Net sales	11,518	3,507	21,027	6,789
International | Adjacent industries OEMs
Disaggregation of Revenue [Line Items]
Net sales	9,503	2,888	18,402	5,066
International | Aftermarket Segment
Disaggregation of Revenue [Line Items]
Net sales	$ 3,108	$ 2,698	$ 6,075	$ 5,044

Segment Reporting (Schedule of

Segment Reporting (Schedule of Operating Profit by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information
Operating profit	$ 64,088	$ 63,040	$ 123,908	$ 122,169
Operating Segments | OEM Segment
Segment Reporting Information
Operating profit	53,591	56,445	107,531	110,842
Operating Segments | Aftermarket Segment
Segment Reporting Information
Operating profit	$ 10,497	$ 6,595	$ 16,377	$ 11,327