Nature of Operations and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2013 item
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	757
United
Agreements with other airlines
Number of aircrafts held by entity	449
Percentage of aggregate capacity operated	60.90%
Delta
Agreements with other airlines
Number of aircrafts held by entity	254
Percentage of aggregate capacity operated	33.60%
American
Agreements with other airlines
Number of aircrafts held by entity	23
Percentage of aggregate capacity operated	2.60%
US Airways
Agreements with other airlines
Number of aircrafts held by entity	15
Percentage of aggregate capacity operated	1.60%
Alaska
Agreements with other airlines
Number of aircrafts held by entity	7
Percentage of aggregate capacity operated	1.30%
Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
Unassigned
Agreements with other airlines
Number of aircrafts held by entity	7
CRJ 200
Agreements with other airlines
Number of aircrafts held by entity	260
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	125
CRJ 200 | American
Agreements with other airlines
Number of aircrafts held by entity	23
CRJ 200 | US Airways
Agreements with other airlines
Number of aircrafts held by entity	11
CRJ 200 | Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
CRJ 200 | Unassigned
Agreements with other airlines
Number of aircrafts held by entity	7
ERJ145
Agreements with other airlines
Number of aircrafts held by entity	242
ERJ145 | United
Agreements with other airlines
Number of aircrafts held by entity	242
ERJ135
Agreements with other airlines
Number of aircrafts held by entity	9
ERJ135 | United
Agreements with other airlines
Number of aircrafts held by entity	9
CRJ700
Agreements with other airlines
Number of aircrafts held by entity	137
CRJ700 | United
Agreements with other airlines
Number of aircrafts held by entity	70
CRJ700 | Delta
Agreements with other airlines
Number of aircrafts held by entity	60
CRJ700 | Alaska
Agreements with other airlines
Number of aircrafts held by entity	7
CRJ 900
Agreements with other airlines
Number of aircrafts held by entity	64
CRJ 900 | Delta
Agreements with other airlines
Number of aircrafts held by entity	60
CRJ 900 | US Airways
Agreements with other airlines
Number of aircrafts held by entity	4
EMB 120
Agreements with other airlines
Number of aircrafts held by entity	45
EMB 120 | United
Agreements with other airlines
Number of aircrafts held by entity	36
EMB 120 | Delta
Agreements with other airlines
Number of aircrafts held by entity	9