Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Business Acquisitions) (Details) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended
	Feb. 29, 2016	Jan. 31, 2016	Jan. 31, 2015	Dec. 31, 2014	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Business Acquisition [Line Items]
Goodwill (tax deductible)					$ 86,112	$ 83,619	$ 66,521
Highwater Marine Furniture
Business Acquisition [Line Items]
Cash consideration		$ 10,000
Net tangible assets	$ 1,307
Total fair value of net assets acquired	9,407
Goodwill (tax deductible)	593
Flair Interiors
Business Acquisition [Line Items]
Cash consideration	8,100
Net other assets	2,200
Total fair value of net assets acquired			$ 6,200
Goodwill (tax deductible)	1,900
EA Technologies
Business Acquisition [Line Items]
Cash consideration			9,248	$ 6,600
Net tangible assets			8,868
Total fair value of net assets acquired			9,348
Gain on bargain purchase			100
Customer Relationships | Highwater Marine Furniture
Business Acquisition [Line Items]
Intangible assets, excluding goodwill	8,100
Customer Relationships | Flair Interiors
Business Acquisition [Line Items]
Intangible assets, excluding goodwill	$ 4,000
Customer Relationships | EA Technologies
Business Acquisition [Line Items]
Intangible assets, excluding goodwill			400
Other Intangible Assets | EA Technologies
Business Acquisition [Line Items]
Intangible assets, excluding goodwill			$ 80