Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Business Acquisitions) (Details) - USD ($) $ in Thousands	1 Months Ended					3 Months Ended
	Apr. 30, 2015	Jan. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Feb. 28, 2014	Dec. 31, 2014	Jun. 30, 2015	Apr. 30, 2014
Business Acquisition
Goodwill (tax deductible)			$ 61,930			$ 66,521	$ 72,922
Spectal Industries
Business Acquisition
Cash consideration	$ 22,335
Contingent consideration	1,093
Total fair value of consideration given	$ 23,428
Net tangible assets								$ 5,027
Total fair value of net assets acquired								17,027
Goodwill (tax deductible)								6,401
EA Technologies
Business Acquisition
Cash consideration		$ 9,248				$ 6,600
Net tangible assets		8,868
Total fair value of net assets acquired		9,348
Power Gear and Kwikee Brands
Business Acquisition
Cash consideration			35,500
Net tangible assets			2,227
Total fair value of net assets acquired			21,957
Goodwill (tax deductible)			13,543
Star Designs
Business Acquisition
Cash consideration				$ 12,232
Net tangible assets				2,108
Total fair value of net assets acquired				7,118
Goodwill (tax deductible)				5,114
Innovative Design Solutions
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
Customer Relationships | Spectal Industries
Business Acquisition
Intangible assets, excluding goodwill								$ 12,000
Customer Relationships | EA Technologies
Business Acquisition
Intangible assets, excluding goodwill		400
Customer Relationships | Power Gear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill			12,300
Customer Relationships | Star Designs
Business Acquisition
Intangible assets, excluding goodwill				4,400
Customer Relationships | Innovative Design Solutions
Business Acquisition
Intangible assets, excluding goodwill					4,000
Patents | Power Gear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill			5,300
Patents | Innovative Design Solutions
Business Acquisition
Intangible assets, excluding goodwill					6,000
Other Identifiable Intangible Assets | EA Technologies
Business Acquisition
Intangible assets, excluding goodwill		80
Gain on bargain purchase		$ 100
Other Identifiable Intangible Assets | Power Gear and Kwikee Brands
Business Acquisition
Intangible assets, excluding goodwill			$ 2,130
Other Identifiable Intangible Assets | Star Designs
Business Acquisition
Intangible assets, excluding goodwill				$ 610
Other Identifiable Intangible Assets | Innovative Design Solutions
Business Acquisition
Intangible assets, excluding goodwill					$ 3,180