Property and Equipment, Net (Schedule of Property and Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment	$ 2,409,600	$ 2,169,700
Less accumulated depreciation and amortization	(1,308,400)	(1,187,400)
Property and equipment, net	1,101,234	982,328
Land
Property and Equipment [Line Items]
Property and equipment	11,100	6,000
Buildings and leasehold improvements
Property and Equipment [Line Items]
Property and equipment	49,200	40,500
Machinery and equipment
Property and Equipment [Line Items]
Property and equipment	2,088,800	1,875,500
Office furniture and equipment
Property and Equipment [Line Items]
Property and equipment	232,400	221,600
Construction in progress
Property and Equipment [Line Items]
Property and equipment	$ 28,100	$ 26,100