Property and Equipment, Net (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property and Equipment [Line Items]
Property and equipment	$ 2,169,700	$ 1,923,500
Less accumulated depreciation and amortization	(1,187,400)	(1,017,700)
Property and equipment, net	982,328	905,835
Land [Member]
Property and Equipment [Line Items]
Property and equipment	6,000	4,900
Building and Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property and equipment	$ 40,500	35,800
Building and Leasehold Improvements [Member] | Minimum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	3 years
Building and Leasehold Improvements [Member] | Maximum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	40 years
Machinery and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	$ 1,875,500	1,659,400
Machinery and Equipment [Member] | Minimum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	2 years
Machinery and Equipment [Member] | Maximum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	20 years
Office Furniture and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	$ 221,600	197,300
Office Furniture and Equipment [Member] | Minimum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	3 years
Office Furniture and Equipment [Member] | Maximum [Member]
Property and Equipment [Line Items]
Estimated useful lives (in years)	7 years
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment	$ 26,100	$ 26,100