Summary of Significant Accounting Policies - Schedule of Deferred Maintenance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Beginning Balance			$ 184,279
Deferred maintenance costs			24,307
Amortization of deferred maintenance	$ (10,300)	$ (5,300)	(18,237)	$ (9,700)
Ending Balance	$ 190,349		$ 190,349