Note 3 - Fair Value Measurement Fair Value Measurements Recurring with Unobservable Inputs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Seats Aircraft	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value - Begin	$ 79.6	$ 86.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	12.0
Fair value gain on restructuring asset	18.4	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(16.8)	(18.8)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value - End	81.2	79.6	86.4
Chautauqua Seats on Aircraft	50
Convertible Notes Payable - EMB Fair Value		25.0
CHQ restructuring call rights provided on owned aircraft	28
Debt Instrument, Interest Rate, Stated Percentage	1.00%
change in fair value of the restructuring asset per a 100 basis point change in discount rate	2.0
possible gain or loss if there is a change in assumed probability of call option on restructured aircrat	3.2
number of seats on E140 aircraft flying for American Airlines	44
Seats on E145 aircraft under CPA with United	50
Number of E140 and E145 aircraft which were grounded during the year	27
Number of aircraft that were grounded and subject to the agreement and callable by the counterparty	15
CHQ Restrucuring - possible voluntary repayment under circumstances of non-performance	$ 36.7