Property and Equipment, Net (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Gross amount	$ 1,142,081	$ 1,052,875
Less accumulated depreciation and amortization	586,914	519,030
Total property and equipment, net	555,167	533,845
Land and improvements
Property, Plant and Equipment [Line Items]
Gross amount	13,982	8,725
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross amount	319,384	249,918
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross amount	82,459	74,602
Machinery and equipment
Property, Plant and Equipment [Line Items]
Gross amount	353,301	322,814
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Gross amount	67,527	53,210
Computer hardware and software
Property, Plant and Equipment [Line Items]
Gross amount	265,664	240,406
Construction in progress
Property, Plant and Equipment [Line Items]
Gross amount	$ 39,764	$ 103,200