Nature of Operations and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015 item aircraft
Agreements with other airlines
Number of daily departures to different destinations | item	3,400
Number of aircrafts held by entity	702
United
Agreements with other airlines
Number of aircrafts held by entity	364
Percentage of aggregate capacity operated	57.50%
Delta
Agreements with other airlines
Number of aircrafts held by entity	235
Percentage of aggregate capacity operated	33.20%
American
Agreements with other airlines
Number of aircrafts held by entity	47
Percentage of aggregate capacity operated	6.40%
Alaska
Agreements with other airlines
Number of aircrafts held by entity	14
Percentage of aggregate capacity operated	2.90%
Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	660
Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
Other
Agreements with other airlines
Number of aircrafts held by entity	40
CRJ 200
Agreements with other airlines
Number of aircrafts held by entity	237
CRJ 200 | United
Agreements with other airlines
Number of aircrafts held by entity	83
CRJ 200 | Delta
Agreements with other airlines
Number of aircrafts held by entity	111
CRJ 200 | American
Agreements with other airlines
Number of aircrafts held by entity	31
CRJ 200 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	225
CRJ 200 | Subleased to an un-affiliated entity
Agreements with other airlines
Number of aircrafts held by entity	2
CRJ 200 | Other
Agreements with other airlines
Number of aircrafts held by entity	10
CRJ 700
Agreements with other airlines
Number of aircrafts held by entity	139
CRJ 700 | United
Agreements with other airlines
Number of aircrafts held by entity	70
CRJ 700 | Delta
Agreements with other airlines
Number of aircrafts held by entity	60
CRJ 700 | Alaska
Agreements with other airlines
Number of aircrafts held by entity	9
CRJ 700 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	139
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	64
CRJ 900 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	64
ERJ135
Agreements with other airlines
Number of aircrafts held by entity	9
ERJ135 | United
Agreements with other airlines
Number of aircrafts held by entity	5
ERJ135 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	5
ERJ135 | Other
Agreements with other airlines
Number of aircrafts held by entity	4
ERJ 145
Agreements with other airlines
Number of aircrafts held by entity	182
ERJ 145 | United
Agreements with other airlines
Number of aircrafts held by entity	166
ERJ 145 | American
Agreements with other airlines
Number of aircrafts held by entity	16
ERJ 145 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	182
E 175
Agreements with other airlines
Number of aircrafts held by entity	45
E 175 | United
Agreements with other airlines
Number of aircrafts held by entity	40
E 175 | Alaska
Agreements with other airlines
Number of aircrafts held by entity	5
E 175 | Aircraft in scheduled service
Agreements with other airlines
Number of aircrafts held by entity	45
EMB 120
Agreements with other airlines
Number of aircrafts held by entity	26
EMB 120 | Other
Agreements with other airlines
Number of aircrafts held by entity	26