Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-term Purchase Commitment [Line Items]
Non-cancelable, purchase commitments	$ 6.8
Cost Of Rental Revenue Excluding Depreciation
Long-term Purchase Commitment [Line Items]
Rent expense	1.9	$ 1.5	$ 1.3
Selling, General and Administrative Expenses
Long-term Purchase Commitment [Line Items]
Rent expense	$ 0.4	0.3	0.3
Property Subject to Operating Lease
Long-term Purchase Commitment [Line Items]
Term of operating lease	5 years
Property Subject to Operating Lease | Cost Of Rental Revenue Excluding Depreciation
Long-term Purchase Commitment [Line Items]
Rent expense	$ 2.2	$ 5.0	$ 2.6