Nature of Operations and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012 aircraft departures
Nature of Operations and Summary of Significant Accounting Policies
Number of daily departures to different destinations	4,000
Agreements with other airlines
Number of aircrafts held by entity	744
American Agreement
Agreements with other airlines
Percentage of aggregate capacity operated	0.20%
United
Agreements with other airlines
Number of aircrafts held by entity	445
Percentage of aggregate capacity operated	64.80%
Delta
Agreements with other airlines
Number of aircrafts held by entity	261
Percentage of aggregate capacity operated	32.20%
US Airways
Agreements with other airlines
Number of aircrafts held by entity	15
Percentage of aggregate capacity operated	1.40%
American
Agreements with other airlines
Number of aircrafts held by entity	12
Alaska
Agreements with other airlines
Number of aircrafts held by entity	5
Percentage of aggregate capacity operated	1.40%
Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
Subleased to an affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	4
CRJ 200
Agreements with other airlines
Number of aircrafts held by entity	268
CRJ 200 | United
Agreements with other airlines
Number of aircrafts held by entity	92
CRJ 200 | Delta
Agreements with other airlines
Number of aircrafts held by entity	147
CRJ 200 | US Airways
Agreements with other airlines
Number of aircrafts held by entity	15
CRJ 200 | American
Agreements with other airlines
Number of aircrafts held by entity	12
CRJ 200 | Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
ERJ 145 | ExpressJet
Agreements with other airlines
Number of aircrafts held by entity	242
ERJ 145 | United | ExpressJet
Agreements with other airlines
Number of aircrafts held by entity	242
ERJ135
Agreements with other airlines
Number of aircrafts held by entity	7
ERJ135 | United
Agreements with other airlines
Number of aircrafts held by entity	7
CRJ 700s
Agreements with other airlines
Number of aircrafts held by entity	135
CRJ 700s | United
Agreements with other airlines
Number of aircrafts held by entity	70
CRJ 700s | Delta
Agreements with other airlines
Number of aircrafts held by entity	60
CRJ 700s | Alaska
Agreements with other airlines
Number of aircrafts held by entity	5
CRJ 900
Agreements with other airlines
Number of aircrafts held by entity	50
CRJ 900 | Delta
Agreements with other airlines
Number of aircrafts held by entity	46
CRJ 900 | Subleased to an affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	4
EMB 120
Agreements with other airlines
Number of aircrafts held by entity	42
EMB 120 | United
Agreements with other airlines
Number of aircrafts held by entity	34
EMB 120 | Delta
Agreements with other airlines
Number of aircrafts held by entity	8