Quarterly report pursuant to Section 13 or 15(d)

ESCROW DEPOSITS Narrative (Details)

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ESCROW DEPOSITS Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
helicopter
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Significant Acquisitions and Disposals [Line Items]        
Deposits in like-kind exchange escrow accounts $ 6,300,000 $ 6,300,000   $ 0
Proceeds from disposition of property and equipment   $ 8,384,000 $ 6,978,000  
Light Twin Helicopter        
Significant Acquisitions and Disposals [Line Items]        
Number of disposals | helicopter   1    
Proceeds from disposition of property and equipment   $ 2,800,000    
AW139 Helicopter        
Significant Acquisitions and Disposals [Line Items]        
Withdrawal from escrow account $ 8,400,000      
AW139 Helicopter | Hauser        
Significant Acquisitions and Disposals [Line Items]        
Number of disposals | helicopter   1    
Escrow deposit by Hauser   $ 11,800,000