Fixed Assets (Schedule of Fixed Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 750,138	$ 678,367
Less accumulated depreciation and amortization	362,920	312,058
Fixed assets, net	387,218	366,309
Land
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	23,063	23,868
Buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	197,291	185,744
Leasehold improvements
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	27,606	23,012
Machinery and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	369,990	311,554
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	94,055	85,901
Construction in progress
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 38,133	$ 48,288
Minimum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful life in years	10 years
Minimum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Maximum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful life in years	40 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life in years	20 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life in years	15 years
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life in years	15 years