Segment Information (Schedule Of Net Sales And Assets By Geographic Region) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 629,788		$ 645,981	$ 657,686	$ 645,613	$ 619,804		$ 647,088	$ 633,189	$ 600,288	$ 2,579,068		$ 2,500,369		$ 2,179,319
Assets	2,889,878					2,843,531					2,889,878		2,843,531		2,706,697
United States [Member]
Segment Reporting Information [Line Items]
Net sales											1,522,135	[1]	1,419,662	[1]	1,281,287	[1]
Assets	1,165,233	[1]				1,203,644	[1]				1,165,233	[1]	1,203,644	[1]	1,110,668	[1]
Canada [Member]
Segment Reporting Information [Line Items]
Net sales											299,955	[1]	271,825	[1]	248,380	[1]
Assets	219,770	[1]				211,663	[1]				219,770	[1]	211,663	[1]	259,957	[1]
Europe [Member]
Segment Reporting Information [Line Items]
Net sales											612,163	[1]	656,816	[1]	531,037	[1]
Assets	634,711	[1]				615,200	[1]				634,711	[1]	615,200	[1]	435,406	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Net sales											144,815	[1]	152,066	[1]	118,615	[1]
Assets	$ 129,413	[1]				$ 111,367	[1]				$ 129,413	[1]	$ 111,367	[1]	$ 264,055	[1]

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