Rental Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 172,004		$ 172,004		$ 169,372
Depreciation			10,648	$ 10,546
Rental Equipment
Property, Plant and Equipment [Line Items]
Accumulated depreciation	20,500		20,500		$ 20,100
Depreciation	$ 1,900	$ 2,200	$ 3,800	$ 4,400