Commitments And Contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of outstanding letters of credit | item	1	1
Letters of credit outstanding	$ 100	$ 100
Rental equipment payable	$ 100,509	$ 25,137	$ 74,139
Loss Contingency, Pending Claims, Number | item	0
Containers [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Commitments to purchase rental equipment	$ 140,900