Acquisitions, Goodwill And Other Intangible Assets (Schedule of Business Acquisitions) (Details) - USD ($) $ in Thousands	1 Months Ended									12 Months Ended
	Aug. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Aug. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Feb. 28, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2015	Jun. 13, 2014	Apr. 30, 2014	Feb. 27, 2014	Dec. 13, 2013
Business Acquisition
Goodwill (tax deductible)										$ 66,521	$ 83,619
Signature Seating
Business Acquisition
Cash consideration	$ 16,000
Contingent consideration	3,556
Total fair value of consideration given	19,556
Net tangible assets	3,633
Total fair value of net assets acquired	11,523
Gain on bargain purchase	8,033
Spectal Industries, Inc.
Business Acquisition
Cash consideration		$ 22,335
Contingent consideration		1,211
Total fair value of consideration given		$ 23,546
Net tangible assets													$ 3,681
Total fair value of net assets acquired													14,481
Goodwill (tax deductible)													9,065
EA Technologies, LLC
Business Acquisition
Cash consideration			$ 9,248							$ 6,600
Total fair value of consideration given			9,200
Net tangible assets			8,868
Total fair value of net assets acquired			9,348
Gain on bargain purchase			100
Duncan Systems, Inc.
Business Acquisition
Cash consideration				$ 18,000
Contingent consideration				1,914
Total fair value of consideration given				19,914
Net tangible assets				4,070
Total fair value of net assets acquired				15,500
Goodwill (tax deductible)				4,414
PowerGear and Kwikee Brands
Business Acquisition
Cash consideration					$ 35,500
Total fair value of consideration given					$ 35,500
Net tangible assets												$ 2,227
Total fair value of net assets acquired												21,957
Goodwill (tax deductible)												13,543
Star Designs, LLC
Business Acquisition
Cash consideration						$ 12,232
Total fair value of consideration given						12,200
Net tangible assets						2,108
Total fair value of net assets acquired						7,118
Goodwill (tax deductible)						5,114
Innovative Design Solutions, Inc
Business Acquisition
Cash consideration							$ 34,175
Present value of future payments							1,739
Contingent consideration							710
Total fair value of consideration given							$ 36,624
Net tangible assets														$ 1,894
Total fair value of net assets acquired														15,074
Goodwill (tax deductible)														21,550
Fortress Technologies LLC
Business Acquisition
Cash consideration								$ 3,299
Net tangible assets															$ 3,410
Total fair value of net assets acquired															3,299
Midstates Tool & Die and Engineering Inc.
Business Acquisition
Cash consideration									$ 1,451
Net tangible assets									1,043
Total fair value of net assets acquired									1,083
Goodwill (tax deductible)									368
Customer Relationships | Signature Seating
Business Acquisition
Intangible assets, excluding goodwill	7,500
Customer Relationships | Spectal Industries, Inc.
Business Acquisition
Intangible assets, excluding goodwill													10,100
Customer Relationships | EA Technologies, LLC
Business Acquisition
Intangible assets, excluding goodwill			400
Customer Relationships | Duncan Systems, Inc.
Business Acquisition
Intangible assets, excluding goodwill				10,500
Customer Relationships | PowerGear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill												12,300
Customer Relationships | Star Designs, LLC
Business Acquisition
Intangible assets, excluding goodwill						4,400
Customer Relationships | Innovative Design Solutions, Inc
Business Acquisition
Intangible assets, excluding goodwill														4,000
Patents | PowerGear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill												5,300
Patents | Innovative Design Solutions, Inc
Business Acquisition
Intangible assets, excluding goodwill														6,000
Other Identifiable Intangible Assets | Signature Seating
Business Acquisition
Intangible assets, excluding goodwill	$ 390
Other Identifiable Intangible Assets | Spectal Industries, Inc.
Business Acquisition
Intangible assets, excluding goodwill													$ 700
Other Identifiable Intangible Assets | EA Technologies, LLC
Business Acquisition
Intangible assets, excluding goodwill			$ 80
Other Identifiable Intangible Assets | Duncan Systems, Inc.
Business Acquisition
Intangible assets, excluding goodwill				$ 930
Other Identifiable Intangible Assets | PowerGear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill												$ 2,130
Other Identifiable Intangible Assets | Star Designs, LLC
Business Acquisition
Intangible assets, excluding goodwill						$ 610
Other Identifiable Intangible Assets | Innovative Design Solutions, Inc
Business Acquisition
Intangible assets, excluding goodwill														$ 3,180
Working capital, net | Fortress Technologies LLC
Business Acquisition
Net tangible assets															$ (111)
Non-compete Agreement | Midstates Tool & Die and Engineering Inc.
Business Acquisition
Intangible assets, excluding goodwill									$ 40