Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Gross amount	$ 550,015	$ 478,309
Less accumulated depreciation and amortization	268,801	233,132
Total property and equipment, net	281,214	245,177
Land And Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross amount	7,471	7,471
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross amount	158,382	123,677
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross amount	39,266	32,144
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross amount	162,144	142,127
Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross amount	35,271	29,317
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Gross amount	136,008	113,512
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Gross amount	$ 11,473	$ 30,061