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Retirement Plans and Employee Stock Purchase Plans (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Retirement Plans and Employee Stock Purchase Plans      
Service period required to be completed for an employee to be eligible to participate in plan, minimum 90 days    
Ownership interest in Company common stock to disqualify employee from participation in plan, maximum (as a percent) 5.00%skyw_EmployeeStockPurchasePlanMaximumOwnershipPercentageInCommonStockToDisqualifyForParticipationInPlan    
Maximum percentage of base salary which can be contributed by the employees 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate    
Maximum amount of base salary which can be contributed annually by the employees $ 25,000skyw_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionAmount    
Discount rate at which common stock can be purchased by the plan participant (as a percent) 5.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate    
Summary of purchases made under the 2010 and 1995 Employee Stock Purchase Plans      
Number of shares purchased 295,035us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 299,786us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 487,451us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
Average price of shares purchased (in dollars per share) $ 12.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased $ 12.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased $ 8.35us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased