Property And Equipment, Net (Schedule Of Property And Equipment, Net) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Property and Equipment [Line Items]
Property and equipment	$ 899,300,000	$ 863,400,000
Less accumulated depreciation and amortization	(389,700,000)	(375,300,000)
Property and equipment, net	509,585,000	488,132,000
Land [Member]
Property and Equipment [Line Items]
Property and equipment	4,600,000	4,800,000
Building and Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and equipment	17,600,000	18,000,000
Machinery and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	752,200,000	727,100,000
Office Furniture and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	108,000,000	102,500,000
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment	$ 16,900,000	$ 11,000,000