Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND DISPOSITIONS Sicher Helicopters SAS ("Sicher") (Details)

v3.8.0.1
ACQUISITIONS AND DISPOSITIONS Sicher Helicopters SAS ("Sicher") (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 09, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]        
Cash   $ 0 $ 0 $ 1,747
Hauser        
Business Acquisition [Line Items]        
Cash $ 3,200      
Remaining ownership percentage acquired 75.00%      
Other intangible assets $ 1,200      
Partner's ownership percent 25.00%      
Other        
Business Acquisition [Line Items]        
Remaining ownership percentage acquired 100.00%