Quarterly report pursuant to Section 13 or 15(d)

Goodwill (Details)

v3.10.0.1
Goodwill (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2018
Jun. 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)     0    
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) 0    
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              
Goodwill [Roll Forward]              
Gross beginning balance         83,529    
Accumulated impairment loss beginning balance         0    
Net beginning balance         83,529    
Impairment loss         0    
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