Property, Plant and Equipment (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 528,023	$ 514,926
Accumulated depreciation and amortization		(375,957)	(356,499)
Property, plant and equipment, net		152,066	158,427
Depreciation and amortization		48,347	46,721	$ 43,945
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		188,022	176,031
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		65,946	61,624
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		23,698	23,724
Computer hardware/software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		108,830	111,846
Land, buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		127,736	124,309
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		6,125	7,754
Finance lease right-of-use assets (1)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	[1]	$ 7,666	$ 9,638

[1] Finance lease right-of-use assets are recorded net of accumulated amortization.