Debt, Related-Party Transactions and Other Obligations - Debt (Narrative) (Details) (USD $)	12 Months Ended						12 Months Ended
	Dec. 31, 2012 leases	Dec. 31, 2013	Dec. 31, 2013 Line of credit Corporate credit cards	Dec. 31, 2012 Line of credit Corporate credit cards	Dec. 31, 2013 Line of credit Aircraft fuel	Dec. 31, 2012 Line of credit Aircraft fuel	Dec. 31, 2013 Quick Engine Change Kit leases
Line of Credit Facility [Line Items]
Long-term debt outstanding	$ 0	$ 0
Number of capital leases	0						2
2014		1,000,000
2015		1,100,000
2016		1,000,000
2017		0
2018		0
2019 and thereafter		0
Capital lease obligations outstanding	0
Line of credit, maximum borrowing capacity			18,600,000.0	18,600,000.0	34,500,000.0	18,000,000
Line of credit, amount outstanding			$ 3,700,000	$ 3,200,000	$ 13,800,000	$ 11,200,000