Bradley Agreement (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Apr. 30, 2000	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Deficiency payments
Deficiency payments:
Balance at the beginning of the year		$ 14,598	$ 13,407
Deficiency payments made		924	1,658
Deficiency payments received		(873)	(467)
Balance at the end of the year		14,649	14,598
Bradley International Airport parking facilities operating agreement
Agreement
Agreement period with the State of Connecticut for operation of parking spaces	25 years
Number of garage parking spaces at Bradley International Airport operated		3,500
Annual minimum guaranteed payment to the State by the trustee		10,593	10,375
Deficiency payments:
Maximum premium percentage on initial deficiency payment		10.00%
Period after notification to deliver deficiency amount to trustee		3 days
Net deficiency payments received (paid)		51	1,991
Interest income on deficiency payment received from trustee		477	85
Premium income on deficiency payment received from trustee		69
Estimated accrued deficiency payments		100	0
Compensation
Number of operating profit tiers		3
Management fee apportioned to the entity (as a percent)		60.00%
Management fee apportioned to an un-affiliated entity (as a percent)		40.00%
Unrecognized cumulative management fees		13,733	12,733
Management fees		0	0	0
Bradley International Airport parking facilities operating agreement | Low end of the range
Agreement
Annual minimum guaranteed payment to the State by the trustee		8,300
Bradley International Airport parking facilities operating agreement | High end of the range
Agreement
Annual minimum guaranteed payment to the State by the trustee		13,200
Bradley International Airport parking facilities operating agreement | State of Connecticut special facility revenue bonds | Low end of the range
Agreement
Annual principal and interest on revenue bonds		3,600
Bradley International Airport parking facilities operating agreement | State of Connecticut special facility revenue bonds | High end of the range
Agreement
Annual principal and interest on revenue bonds		$ 4,500