Intangible Assets (Schedule Of Goodwill And Net Carrying Amount Of Intangible Assets With Indefinite Lives) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Trade Name [Member]	Dec. 31, 2012 Trade Name [Member]	Dec. 31, 2013 U.S. [Member]	Dec. 31, 2012 U.S. [Member]	Dec. 31, 2013 U.S. [Member] Trade Name [Member]	Dec. 31, 2011 U.S. [Member] Trade Name [Member]	Dec. 31, 2013 Europe [Member]		Dec. 31, 2012 Europe [Member]		Dec. 31, 2013 Europe [Member] Trade Name [Member]	Dec. 31, 2012 Europe [Member] Trade Name [Member]	Dec. 31, 2013 Other International [Member]		Dec. 31, 2012 Other International [Member]
Indefinite-lived Intangible Assets by Segment [Line Items]
Goodwill gross, beginning balance	$ 335,699	$ 321,565			$ 268,454	$ 255,465			$ 64,142	[1]	$ 63,364	[1]			$ 3,103	[2]	$ 2,736	[2]
Accumulated impairment loss, beginning balance	(50,003)	(50,003)							(50,003)	[1]	(50,003)	[1]
Goodwill net, beginning balance	285,696	271,562			268,454	255,465			14,139	[1]	13,361	[1]			3,103	[2]	2,736	[2]
Acquisitions	111,245	12,832			13,316	12,306			97,929	[1]	199	[1]					327	[2]
Purchase price adjustments	170	685			29	683									141	[2]	2	[2]
Allocation adjustment					6,640				(6,860)	[1]					220	[2]
Foreign currency translation adjustments	7,380	617							7,552	[1]	579	[1]			(172)	[2]	38	[2]
Goodwill gross, ending balance	454,494	335,699			288,439	268,454			162,763	[1]	64,142	[1]			3,292	[2]	3,103	[2]
Accumulated impairment loss, ending balance	(50,003)	(50,003)							(50,003)	[1]	(50,003)	[1]
Goodwill net, ending balance	404,491	285,696			288,439	268,454			112,760	[1]	14,139	[1]			3,292	[2]	3,103	[2]
Indefinite lived intangible asset, Beginning balance			3,431	3,298			200	200					3,231	3,098
Acquisitions			513										513
Indefinite-lived Intangible Assets Reclassification to Definite-lived			(3,298)										(3,298)
Indefinite lived intangible asset, foreign currency translation adjustments			114	133									114	133
Indefinite lived intangible asset, Ending balance			$ 760	$ 3,431			$ 200	$ 200					$ 560	$ 3,231

[1] The Europe segment is comprised of the Company’s operations in U.K. and Germany.

[2] The Other International segment is comprised of the Company’s operations in Mexico and Canada.