Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)	1 Months Ended												3 Months Ended		12 Months Ended
	Feb. 29, 2016	Jan. 31, 2016	Aug. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Aug. 31, 2014	Jun. 30, 2014	Apr. 30, 2014	Mar. 31, 2014	Feb. 28, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2015
Business Acquisition
Long-term purchase commitment, time period													6 years
Pre-tax loss on sale of business assets													$ 2,000,000
Proceeds from sale of aluminum extrusion assets, cash received								$ 300,000
Proceeds from sale of aluminum extrusion assets, note receivable								$ 7,200,000
Term of note receivable								4 years
Proceeds from first installment of note receivable													3,800,000		$ 2,000,000	$ 1,750,000	$ 0
Present value of note receivable								$ 6,400,000					$ 3,200,000		$ 3,200,000
Note payable term (in years)										3 years
Gain (loss) on contract termination														$ 1,600,000
Signature Seating
Business Acquisition
Annual sales of acquired entity			$ 16,000,000
Cash consideration			16,000,000
Purchase price			$ 19,556,000
Signature Seating | Customer Relationships
Business Acquisition
Estimated useful life in years			15 years
Spectal Industries, Inc.
Business Acquisition
Annual sales of acquired entity				$ 25,000,000
Cash consideration				22,335,000
Purchase price				$ 23,546,000
Spectal Industries, Inc. | Customer Relationships
Business Acquisition
Estimated useful life in years				15 years
EA Technologies, LLC
Business Acquisition
Annual sales of acquired entity					$ 17,000,000
Cash consideration					9,248,000											$ 6,600,000
Purchase price					$ 9,200,000
Duncan Systems, Inc.
Business Acquisition
Annual sales of acquired entity						$ 26,000,000
Cash consideration						18,000,000
Purchase price						$ 19,914,000
Duncan Systems, Inc. | Customer Relationships
Business Acquisition
Estimated useful life in years													14 years
PowerGear and Kwikee Brands
Business Acquisition
Annual sales of acquired entity							$ 28,000,000
Cash consideration							35,500,000
Purchase price							$ 35,500,000
PowerGear and Kwikee Brands | Patents
Business Acquisition
Estimated useful life in years													8 years
PowerGear and Kwikee Brands | Customer Relationships
Business Acquisition
Estimated useful life in years													14 years
Star Designs, LLC
Business Acquisition
Annual sales of acquired entity									$ 10,000,000
Cash consideration									12,232,000
Purchase price									$ 12,200,000
Star Designs, LLC | Customer Relationships
Business Acquisition
Estimated useful life in years													14 years
Fortress Technologies LLC
Business Acquisition
Annual sales of acquired entity											$ 3,000,000
Cash consideration											$ 3,299,000
Innovative Design Solutions, Inc
Business Acquisition
Annual sales of acquired entity										$ 19,000,000
Revenue from acquired entity to company for last annual period										15,000,000
Consideration transferred total, less future payments										35,900,000
Cash consideration										34,175,000
Purchase price										$ 36,624,000
Innovative Design Solutions, Inc | Patents
Business Acquisition
Estimated useful life in years													10 years
Innovative Design Solutions, Inc | Customer Relationships
Business Acquisition
Estimated useful life in years													12 years
Midstates Tool & Die and Engineering Inc.
Business Acquisition
Annual sales of acquired entity												$ 2,000,000
Cash consideration												$ 1,451,000
Note Receivable For Contract Termination
Business Acquisition
Principal amount of note receivable																		$ 2,000,000.0
Present value of note receivable														$ 1,600,000				$ 1,600,000
Subsequent Event | Flair Interiors, Inc.
Business Acquisition
Annual sales of acquired entity	$ 25,000,000
Cash consideration	$ 8,100,000
Subsequent Event | Highwater Marine, LLC
Business Acquisition
Annual sales of acquired entity		$ 20,000,000
Cash consideration		$ 10,000,000