Subsequent Events (Details) - aircraft	1 Months Ended	6 Months Ended	12 Months Ended
	Aug. 31, 2021	Jun. 30, 2021	Jun. 30, 2023
E175
Subsequent Event [Line Items]
Number of aircraft under purchase agreement		29
CRJ 900 | Forecast
Subsequent Event [Line Items]
Number of aircraft to be replaced			16
Subsequent event | Delta Capacity Purchase Agreement | E175
Subsequent Event [Line Items]
Number of aircraft under purchase agreement	16