Goodwill (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 29, 2017 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2018 |
|
| Goodwill [Roll Forward] | |||||||||||||
| Goodwill, beginning balance | $ 159,696,000 | $ 327,836,000 | $ 159,696,000 | $ 327,836,000 | |||||||||
| Impairment loss | $ 0 | $ 0 | $ 0 | 0 | $ (89,000,000) | $ 0 | $ 0 | (78,000,000) | 0 | (167,000,000) | $ (64,000,000) | ||
| Settlement received related to acquisition | (1,250,000) | ||||||||||||
| Foreign currency translation and other | (134,000) | 110,000 | |||||||||||
| Goodwill, ending balance | 159,562,000 | 159,696,000 | 159,562,000 | 159,696,000 | 327,836,000 | ||||||||
| Gross carrying amount | $ 390,562,000 | ||||||||||||
| Accumulated impairment loss | (231,000,000) | ||||||||||||
| Goodwill, Net | 159,562,000 | 159,696,000 | 159,696,000 | 327,836,000 | 159,696,000 | 327,836,000 | 327,836,000 | 159,562,000 | |||||
| Working capital settlement adjustment | 0 | 15,483,000 | 0 | ||||||||||
| Aviation Connectivity | |||||||||||||
| Goodwill [Roll Forward] | |||||||||||||
| Goodwill, beginning balance | 54,037,000 | 98,037,000 | 54,037,000 | 98,037,000 | |||||||||
| Impairment loss | (44,000,000) | (44,000,000) | |||||||||||
| Settlement received related to acquisition | 0 | ||||||||||||
| Foreign currency translation and other | (15,000) | 0 | |||||||||||
| Goodwill, ending balance | 54,022,000 | 54,037,000 | 54,022,000 | 54,037,000 | 98,037,000 | ||||||||
| Gross carrying amount | 98,022,000 | ||||||||||||
| Accumulated impairment loss | (44,000,000) | ||||||||||||
| Goodwill, Net | 54,022,000 | 54,037,000 | 54,037,000 | 98,037,000 | 54,037,000 | 98,037,000 | 98,037,000 | 54,022,000 | |||||
| Maritime & Land Connectivity | |||||||||||||
| Goodwill [Roll Forward] | |||||||||||||
| Goodwill, beginning balance | 22,130,000 | 146,380,000 | 22,130,000 | 146,380,000 | |||||||||
| Impairment loss | (45,000,000) | (78,000,000) | (123,000,000) | (64,000,000) | |||||||||
| Settlement received related to acquisition | (1,250,000) | ||||||||||||
| Foreign currency translation and other | 0 | 0 | |||||||||||
| Goodwill, ending balance | 22,130,000 | 22,130,000 | 22,130,000 | 22,130,000 | 146,380,000 | ||||||||
| Gross carrying amount | 209,130,000 | ||||||||||||
| Accumulated impairment loss | (187,000,000) | ||||||||||||
| Goodwill, Net | 22,130,000 | 22,130,000 | 22,130,000 | 146,380,000 | 22,130,000 | 146,380,000 | 146,380,000 | 22,130,000 | |||||
| Media & Content | |||||||||||||
| Goodwill [Roll Forward] | |||||||||||||
| Goodwill, beginning balance | 83,529,000 | 83,419,000 | 83,529,000 | 83,419,000 | |||||||||
| Impairment loss | 0 | ||||||||||||
| Settlement received related to acquisition | 0 | ||||||||||||
| Foreign currency translation and other | (119,000) | 110,000 | |||||||||||
| Goodwill, ending balance | 83,410,000 | 83,529,000 | 83,410,000 | 83,529,000 | 83,419,000 | ||||||||
| Gross carrying amount | 83,410,000 | ||||||||||||
| Accumulated impairment loss | 0 | ||||||||||||
| Goodwill, Net | $ 83,410,000 | $ 83,529,000 | $ 83,529,000 | $ 83,419,000 | $ 83,529,000 | $ 83,419,000 | $ 83,419,000 | $ 83,410,000 | |||||
| Emerging Markets Communications LLC | |||||||||||||
| Goodwill [Roll Forward] | |||||||||||||
| Working capital settlement adjustment | $ 1,300,000 | ||||||||||||