Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Increase in goodwill related to acquisitions associated with the valuation of Robuschi			$ 112,221,000
Amortization of intangible assets	7,500,000	4,300,000
Anticipated amortization of intangible assets, remainder of fiscal year	19,600,000
Anticipated amortization of intangible assets in 2013	16,100,000
Anticipated amortization of intangible assets in 2014	16,100,000
Anticipated amortization of intangible assets in 2015	16,100,000
Anticipated amortization of intangible assets in 2016	16,100,000
Robuschi S.P.A. [Member]
Amortization of intangible assets	$ 3,400,000