Segment Information (Schedule Of Net Sales And Assets By Geographic Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010		Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Net sales	$ 631,618		$ 659,456	$ 643,773	$ 611,020	$ 574,006		$ 560,714	$ 552,814	$ 530,291	$ 2,545,867	[1]	$ 2,217,825	[1]	$ 2,196,343	[1]
Assets	2,843,531	[1]				2,706,697	[1]				2,843,531	[1]	2,706,697	[1]	2,712,898	[1]
United States [Member]
Segment Reporting Information [Line Items]
Net sales											1,465,160	[1]	1,319,793	[1]	1,322,433	[1]
Assets	1,203,644	[1]				1,110,668	[1]				1,203,644	[1]	1,110,668	[1]	998,827	[1]
Canada [Member]
Segment Reporting Information [Line Items]
Net sales											271,825	[1]	248,380	[1]	227,091	[1]
Assets	211,663	[1]				259,957	[1]				211,663	[1]	259,957	[1]	288,793	[1]
Europe [Member]
Segment Reporting Information [Line Items]
Net sales											656,816	[1]	531,037	[1]	544,561	[1]
Assets	615,200	[1]				435,406	[1]				615,200	[1]	435,406	[1]	422,844	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Net sales											152,066	[1]	118,615	[1]	102,258	[1]
Assets	111,367	[1]				264,055	[1]				111,367	[1]	264,055	[1]	186,244	[1]
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 701,657	[1]				$ 636,611	[1]				$ 701,657	[1]	$ 636,611	[1]	$ 816,190	[1]

[1] Net sales and assets by geographic region are based on the location of the business unit.