Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Business Acquisitions) (Details) - USD ($) $ in Thousands			1 Months Ended					9 Months Ended
	Jun. 30, 2017	Feb. 01, 2017	May 31, 2017	Feb. 28, 2017	May 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	May 01, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Cash consideration net of cash acquired								$ 67,876	$ 34,237
Goodwill								123,001	$ 93,925		$ 89,198
Metallarte S.p.A.
Business Acquisition [Line Items]
Cash consideration	$ 14,100
Cash consideration net of cash acquired	13,501
Contingent consideration	2,366
Total fair value of consideration given	$ 15,867
Net other assets								167
Total fair value of net assets acquired								9,317
Goodwill								6,550
Lexington
Business Acquisition [Line Items]
Cash consideration			$ 40,062
Total fair value of consideration given			$ 40,100
Net other assets										$ 4,928
Total fair value of net assets acquired										23,648
Goodwill										16,414
SessaKlein S.p.A.
Business Acquisition [Line Items]
Cash consideration net of cash acquired		$ 6,502
Contingent consideration		4,922
Total fair value of consideration given		11,424		$ 8,500
Net other assets		585
Total fair value of net assets acquired		5,103
Goodwill		6,321
Project 2000
Business Acquisition [Line Items]
Cash consideration					$ 18,800
Cash consideration net of cash acquired					16,618
Contingent consideration					1,322
Total fair value of consideration given					17,940
Net other assets					(3,482)
Total fair value of net assets acquired					12,355
Goodwill					5,585
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							593
Flair Interiors
Business Acquisition [Line Items]
Cash consideration						$ 8,100
Net other assets						2,378
Total fair value of net assets acquired						6,078
Goodwill						2,022
Customer Relationships | Metallarte S.p.A.
Business Acquisition [Line Items]
Identifiable intangible assets								7,000
Customer Relationships | Lexington
Business Acquisition [Line Items]
Identifiable intangible assets										16,900
Customer Relationships | SessaKlein S.p.A.
Business Acquisition [Line Items]
Identifiable intangible assets		3,189
Customer Relationships | Project 2000
Business Acquisition [Line Items]
Identifiable intangible assets					9,696
Customer Relationships | Highwater Marine Furniture
Business Acquisition [Line Items]
Identifiable intangible assets							$ 8,100
Customer Relationships | Flair Interiors
Business Acquisition [Line Items]
Identifiable intangible assets						$ 3,700
Other Intangible Assets | Metallarte S.p.A.
Business Acquisition [Line Items]
Identifiable intangible assets								$ 2,150
Other Intangible Assets | Lexington
Business Acquisition [Line Items]
Identifiable intangible assets										$ 1,820
Other Intangible Assets | SessaKlein S.p.A.
Business Acquisition [Line Items]
Identifiable intangible assets		$ 1,329
Other Intangible Assets | Project 2000
Business Acquisition [Line Items]
Identifiable intangible assets					$ 6,141