Summary of Significant Accounting Policies - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]
Credit shell, term of expiration	60 days
Amortization of heavy maintenance and major overhaul costs	$ 23,607,000	$ 9,100,000	$ 2,574,000
Deferred costs for heavy maintenance	70,800,000	61,600,000	22,100,000
Deferred heavy maintenance, gross	165,300,000	94,500,000
Accumulated heavy maintenance amortization	(40,000,000)	(14,000,000)
Marketing and advertising expenses	2,100,000	2,400,000	2,500,000
Related-party interest expense	0	0	21,000,000
Non-related party interest expense	200,000	1,400,000	3,800,000
Insurance Deductible	$ 800,000
Aircraft fuel expenditure concentration risk | Total operating expenses
Concentration Risk [Line Items]
Concentration of risk	40.00%	41.00%	42.00%
Unionized employees concentration risk | Number of employees, total
Concentration Risk [Line Items]
Concentration of risk	59.00%	54.00%
Union-represented employee groups	3	3