Bradley Agreement - Narrative (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	May 31, 2020	Feb. 29, 2000	Sep. 30, 2021
Bradley International Airport Parking Facilities Operating Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Agreement period for operation of parking spaces		25 years
Effective date of agreement termination			May 31, 2020
Cash consideration to minority partners	$ 1.7
Connecticut Airport Authority
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Agreement effective date			Jun. 01, 2020