XML 22 R50.htm IDEA: XBRL DOCUMENT v2.4.0.6
Retirement Plans and Employee Stock Purchase Plans (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended
Dec. 31, 2007
Y
Nov. 30, 2007
Y
Dec. 31, 2012
Y
Dec. 31, 2012
Minimum
Y
Dec. 31, 2012
Maximum
Y
Dec. 31, 2012
SkyWest Plan
Y
D
Dec. 31, 2011
SkyWest Plan
Dec. 31, 2010
SkyWest Plan
Dec. 31, 2012
Atlantic Southeast and the ExpressJet Plans
Dec. 31, 2011
Atlantic Southeast and the ExpressJet Plans
Dec. 31, 2010
Atlantic Southeast and the ExpressJet Plans
Dec. 31, 2012
Atlantic Southeast Plan
Y
D
Dec. 31, 2012
Atlantic Southeast Plan
Minimum
Dec. 31, 2012
Atlantic Southeast Plan
Maximum
Retirement Plans                            
Service period required to be completed to be eligible to participate in plan (in days)           90           90    
Required age for an employee to be eligible to participate in plan (in years)           18           18    
Percentage of employer matching contribution based on length of service           100.00%             20.00% 75.00%
Percentage of participant's compensation eligible for employer's matching contribution based upon length of service, threshold one           2.00%                
Percentage of participant's compensation eligible for employer's matching contribution based upon length of service, threshold two           4.00%                
Percentage of participant compensation eligible for employer's matching contribution based upon length of service, threshold three           6.00%                
Company's combined contributions           $ 16.0 $ 14.4 $ 13.3 $ 26.4 $ 25.1 $ 5.8      
Maximum percentage of participant's total compensation eligible for employer matching contribution                       6.00%    
Minimum service period required to be completed for eight percent matching contribution by the employer (in years)                       10    
Maximum percentage of participant's total compensation eligible for employer matching contribution after requisite service period                       8.00%    
Percentage of vesting for plan participants' elective deferrals and rollover amounts                       100.00%    
Percentage of vesting of company matching contribution based on length of service                         10.00% 100.00%
ExpressJet Plan                            
Eligible age to provide medical bridge coverage (in years)       60 65                  
Minimum period of service required to be completed by retired employees for availing medical bridge coverage (in years)     10                      
Mandatory retirement age for commercial pilots (in years) 65 60                        
Company's combined contributions           $ 16.0 $ 14.4 $ 13.3 $ 26.4 $ 25.1 $ 5.8