Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND DISPOSITIONS Dispositions (Details)

v3.8.0.1
ACQUISITIONS AND DISPOSITIONS Dispositions (Details) - Subsequent Event
$ in Thousands
Feb. 23, 2018
USD ($)
operating_facility
helicopter
Property, Plant and Equipment [Line Items]  
Number of operating facilities | operating_facility 2
Property, plant and equipment, disposals | $ $ 10,000
AS350 Single Helicopter Engines  
Property, Plant and Equipment [Line Items]  
Number of disposals | helicopter 8