Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Narrative) (Details)

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Commitments And Contingencies (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 3 Months Ended
Apr. 30, 2014
Jun. 30, 2014
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Total unfunded capital commitments   $ 299.8
Purchase commitments payable during the period   66.4
Deposits paid on options not yet exercised   2.3
Potential reduction amount of liability   146.3
Liquidated amount liability   9.6
Aircraft Maintenance Credits Period 4 years  
Aircraft Maintenance Credits Utilized for the Period   $ 1.6
AW189 Heavy Helicopters [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Number of helicopters (in helicopters)   10
Additional number of helicopters (in helicopters)   10
S92 Heavy Helicopters [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Number of helicopters (in helicopters)   4
Additional number of helicopters (in helicopters)   5
AW169 Light Twin Helicopters [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Number of helicopters (in helicopters)   5
AW139 Medium Helicopter [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Additional number of helicopters (in helicopters)   4
Minimum [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Expected Duration of Aircraft Maintenance Credits 18 months  
Maximum [Member]
    
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Expected Duration of Aircraft Maintenance Credits 30 months