Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Significant Accounting Policies [Line Items]
Deferred maintenance amortization expense		$ 10,300	$ 5,300	$ 18,237	$ 9,700
Customer warrant liability reclassified as additional paid in capital	$ 14,600
Percentage of customer warrant liability	60.00%
Customer warrant liability	$ 24,300
Dry Leases [Member]
Significant Accounting Policies [Line Items]
Percentage of customer warrant liability	40.00%
Customer warrant liability	$ 9,700