Business Segments and Major Customers - Reconciliation of Segment Profit (loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	$ 15,240	$ 10,062	$ 43,916	$ 28,996
Interest income	852	49	1,064	65
Interest expense	(24,848)	(16,734)	(58,701)	(42,630)
Depreciation and amortization	(26,779)	(22,224)	(76,042)	(61,814)
Amortization of deferred airborne lease incentives	7,765	5,143	20,650	13,740
Stock-based compensation expense	(5,000)	(4,544)	(12,986)	(10,843)
Adjustment to deferred financing costs			792
Loss on extinguishment of debt			(15,406)
Other income (expense)	(34)	(377)	137	(287)
Loss before income taxes	(32,804)	(28,625)	(96,576)	(72,773)
CA-NA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	14,509	11,825	46,966	32,685
CA-ROW [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	(19,924)	(19,927)	(62,945)	(56,199)
BA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment profit (loss)	$ 20,655	$ 18,164	$ 59,895	$ 52,510