Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands			1 Months Ended											12 Months Ended
	Jun. 30, 2017	Feb. 01, 2017	Feb. 28, 2018	Jan. 31, 2018	Jun. 30, 2017	May 31, 2017	Nov. 30, 2016	May 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Aug. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Metallarte S.r.l.
Business Acquisition
Percentage of outstanding shares acquired	100.00%				100.00%
Purchase price	$ 15,867
Cash consideration	$ 14,100
Metallarte S.r.l. | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets					15 years
Lexington
Business Acquisition
Purchase price						$ 40,100
Cash consideration						$ 40,062
Lexington | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets						15 years
Sessa Klein S.p.A.
Business Acquisition
Percentage of outstanding shares acquired		100.00%
Purchase price		$ 11,424
Cash consideration		$ 8,500
Sessa Klein S.p.A. | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets		15 years
Camping Connection, Inc.
Business Acquisition
Purchase price							$ 2,000
Atwood Mobile Products, LLC
Business Acquisition
Purchase price							12,500
Cash consideration							$ 12,463
Atwood Mobile Products, LLC | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets							15 years
Project 2000
Business Acquisition
Percentage of outstanding shares acquired								100.00%
Purchase price								$ 17,940
Cash consideration								$ 18,800
Project 2000 | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets								15 years
Flair Interiors
Business Acquisition
Cash consideration									$ 8,100
Flair Interiors | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets									15 years
Highwater
Business Acquisition
Cash consideration										$ 10,000
Highwater | Customer Relationships
Business Acquisition
Weighted average useful life of acquired intangible assets										15 years
Signature Seating
Business Acquisition
Purchase price											$ 19,556
Cash consideration											$ 16,000
Signature Seating | Customer Relationships
Business Acquisition
Estimated useful life in years											15 years
Spectal Industries, Inc.
Business Acquisition
Purchase price												$ 23,546
Cash consideration												$ 22,335
Spectal Industries, Inc. | Customer Relationships
Business Acquisition
Estimated useful life in years												15 years
EA Technologies, LLC
Business Acquisition
Purchase price													$ 9,200
Cash consideration													$ 9,248	$ 6,600
Subsequent Event | Hehr International Inc.
Business Acquisition
Cash consideration			$ 49,900
Subsequent Event | Taylor Made Group, LLC
Business Acquisition
Percentage of outstanding shares acquired				100.00%
Cash consideration				$ 88,900
Operating Segments | OEM Segment
Business Acquisition
Accumulated impairment															$ (50,500)