Property and Equipment, net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 261,708	$ 225,907
Less: Accumulated depreciation	(117,428)	(96,412)
Net property and equipment	144,280	129,495
Total property and equipment, net	157,124	142,054
Land
Property, Plant and Equipment [Line Items]
Gross property and equipment	3,203	3,614
Buildings and improvements
Property, Plant and Equipment [Line Items]
Gross property and equipment	21,497	20,803
Machinery and equipment
Property, Plant and Equipment [Line Items]
Gross property and equipment	54,264	47,606
Finance lease right-of-use asset
Property, Plant and Equipment [Line Items]
Gross property and equipment	26,001	25,165
Rental equipment
Property, Plant and Equipment [Line Items]
Gross property and equipment	151,764	124,002
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Gross property and equipment	1,693	1,623
Computers and software
Property, Plant and Equipment [Line Items]
Gross property and equipment	3,286	3,094
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment, net	$ 12,844	$ 12,559