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SUBSEQUENT EVENT	3 Months Ended
SUBSEQUENT EVENT	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS See discussion of the pending acquisition of Virgin America at Note 2. On April 11, 2016 Horizon placed an order for 30 Embraer E 175 regional aircraft (E175s), with the option to purchase an additional 33. The E175s will be flown by Horizon exclusively for Alaska beginning in 2017. An estimate of the future financial impacts related to the purchase agreement is included in our forward looking capital expenditures table within Item 2, MD&A.