Bradley Agreement - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 29, 2000	Dec. 31, 2020
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