Summary of Significant Accounting Policies - Narrative (Details) - USD ($)		6 Months Ended	12 Months Ended
	Sep. 27, 2019	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2021
Revenue from External Customer [Line Items]
Depreciation expense			$ 70,568,000	$ 64,093,000	$ 61,873,000
Residual value			0
Impairment loss	$ 700,000		657,000	0	610,000
Statutorily-required minimum benefits charge	200,000
Amortization - financing costs			2,913,000	3,537,000	2,907,000
Revenues			189,161,000	177,032,000	153,786,000
Revenues			74,874,000	69,265,000	49,981,000
Deferred revenue			2,300,000	4,800,000
Capital lease obligations			28,100,000
Major repair disposal			$ 2,216,000	1,436,000	0
Minimum
Revenue from External Customer [Line Items]
Useful life			3 years
Maximum
Revenue from External Customer [Line Items]
Useful life			15 years
Forecast | Minimum
Revenue from External Customer [Line Items]
ROU assets						$ 8,000,000.0
Operating lease liability						8,000,000
Forecast | Maximum
Revenue from External Customer [Line Items]
ROU assets						10,000,000.0
Operating lease liability						$ 10,000,000
Rental revenue
Revenue from External Customer [Line Items]
Revenues			$ 189,161,000	177,032,000	153,786,000
Revenues			8,835,000	7,531,000	7,102,000
Rental revenue | Reclassification Adjustment
Revenue from External Customer [Line Items]
Revenues			2,900,000	3,200,000	2,600,000
Parts sales and services
Revenue from External Customer [Line Items]
Revenues			0	0	0
Revenues			31,964,000	17,366,000	15,624,000
Rental Equipment
Revenue from External Customer [Line Items]
Revenues			0	0	0
Revenues			23,767,000	26,019,000	17,162,000
New Equipment
Revenue from External Customer [Line Items]
Revenues			0	0	0
Revenues			$ 10,308,000	18,349,000	10,093,000
Parts, tools and accessories inventory
Revenue from External Customer [Line Items]
Useful life			5 years
Rental Equipment
Revenue from External Customer [Line Items]
Useful life			7 years
Estimated residual value, percentage			15.00%
Assets Leased to Others
Revenue from External Customer [Line Items]
Depreciation expense			$ 70,600,000	64,100,000	61,900,000
Impairment loss	$ 700,000
Term of operating lease			28 days
Payment term for lease			30 days
Non-Rental Property and Equipment
Revenue from External Customer [Line Items]
Depreciation expense			$ 900,000	$ 900,000	$ 800,000
V&H Acquisition
Revenue from External Customer [Line Items]
Impairment loss		$ 600,000