Property and Equipment, Net (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property and Equipment [Line Items]
Property and equipment	$ 2,127,600	$ 1,923,500
Less accumulated depreciation and amortization	(1,133,400)	(1,017,700)
Property and equipment, net	994,193	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	40,800	35,800
Machinery and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	1,834,700	1,659,400
Office Furniture and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment	216,300	197,300
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment	$ 29,800	$ 26,100