Quarterly report pursuant to Section 13 or 15(d)

Goodwill (Details)

v3.10.0.1
Goodwill (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Mar. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Goodwill [Roll Forward]              
Gross beginning balance         $ 390,696    
Accumulated impairment loss beginning balance         (231,000)    
Net beginning balance         159,696    
Impairment loss $ 0   $ 0   0 $ (78,000) $ (167,000)
Foreign currency translation adjustments         (86)    
Gross ending balance 390,610 $ 390,696     390,610   390,696
Accumulated impairment loss ending balance (231,000) (231,000)     (231,000)   (231,000)
Net ending balance 159,610 159,696     159,610   159,696
Aviation Connectivity Reporting Unit              
Goodwill [Roll Forward]              
Gross beginning balance         98,037    
Accumulated impairment loss beginning balance         (44,000)    
Net beginning balance         54,037    
Impairment loss   (44,000)          
Foreign currency translation adjustments         (15)    
Gross ending balance 98,022 98,037     98,022   98,037
Accumulated impairment loss ending balance (44,000) (44,000)     (44,000)   (44,000)
Net ending balance 54,022 54,037     54,022   54,037
Maritime & Land Connectivity Reporting Unit              
Goodwill [Roll Forward]              
Gross beginning balance         209,130    
Accumulated impairment loss beginning balance         (187,000)    
Net beginning balance         22,130    
Impairment loss   (45,000)   $ (78,000)      
Foreign currency translation adjustments         0    
Gross ending balance 209,130 209,130     209,130   209,130
Accumulated impairment loss ending balance (187,000) (187,000)     (187,000)   (187,000)
Net ending balance 22,130 22,130     22,130   22,130
Media & Content Reporting Unit              
Goodwill [Roll Forward]              
Gross beginning balance         83,529    
Accumulated impairment loss beginning balance         0    
Net beginning balance         83,529    
Foreign currency translation adjustments         (71)    
Gross ending balance 83,458 83,529     83,458   83,529
Accumulated impairment loss ending balance 0 0     0   0
Net ending balance $ 83,458 $ 83,529     $ 83,458   $ 83,529