Goodwill (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 29, 2017 |
Jul. 27, 2016 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2017 |
|
| Goodwill [Roll Forward] | ||||||||||||||
| Goodwill, beginning balance | $ 327,836,000 | $ 93,796,000 | $ 327,836,000 | $ 93,796,000 | ||||||||||
| Goodwill related to the EMC acquisition | 298,847,000 | |||||||||||||
| Impairment loss | $ (89,000,000) | $ 0 | $ 0 | (78,000,000) | $ (64,000,000) | $ 0 | $ 0 | 0 | (167,000,000) | (64,000,000) | $ 0 | |||
| Adjustment to RMG goodwill | (1,250,000) | (812,000) | ||||||||||||
| Foreign currency translation and other | 110,000 | 5,000 | ||||||||||||
| Goodwill, ending balance | 159,696,000 | 327,836,000 | 159,696,000 | 327,836,000 | 93,796,000 | |||||||||
| Gross carrying amount | $ 390,696,000 | |||||||||||||
| Accumulated impairment loss | (231,000,000) | |||||||||||||
| Goodwill, Net | 159,696,000 | 327,836,000 | 327,836,000 | 93,796,000 | 327,836,000 | 93,796,000 | 93,796,000 | 159,696,000 | ||||||
| Working capital settlement adjustment | 15,483,000 | 0 | 0 | |||||||||||
| Aviation Connectivity | ||||||||||||||
| Goodwill [Roll Forward] | ||||||||||||||
| Goodwill, beginning balance | 98,037,000 | 19,273,000 | 98,037,000 | 19,273,000 | ||||||||||
| Goodwill related to the EMC acquisition | 78,764,000 | |||||||||||||
| Impairment loss | (44,000,000) | 0 | ||||||||||||
| Adjustment to RMG goodwill | 0 | 0 | ||||||||||||
| Foreign currency translation and other | 0 | 0 | ||||||||||||
| Goodwill, ending balance | 54,037,000 | 98,037,000 | 54,037,000 | 98,037,000 | 19,273,000 | |||||||||
| Gross carrying amount | 98,037,000 | |||||||||||||
| Accumulated impairment loss | (44,000,000) | |||||||||||||
| Goodwill, Net | 54,037,000 | 98,037,000 | 98,037,000 | 19,273,000 | 98,037,000 | 19,273,000 | 19,273,000 | 54,037,000 | ||||||
| Maritime & Land Connectivity | ||||||||||||||
| Goodwill [Roll Forward] | ||||||||||||||
| Goodwill, beginning balance | 146,380,000 | 0 | 146,380,000 | 0 | ||||||||||
| Goodwill related to the EMC acquisition | 210,380,000 | |||||||||||||
| Impairment loss | (45,000,000) | (78,000,000) | (123,000,000) | (64,000,000) | ||||||||||
| Adjustment to RMG goodwill | (1,250,000) | 0 | ||||||||||||
| Foreign currency translation and other | 0 | 0 | ||||||||||||
| Goodwill, ending balance | 22,130,000 | 146,380,000 | 22,130,000 | 146,380,000 | 0 | |||||||||
| Gross carrying amount | 209,130,000 | |||||||||||||
| Accumulated impairment loss | (187,000,000) | |||||||||||||
| Goodwill, Net | 22,130,000 | 146,380,000 | 146,380,000 | 0 | 146,380,000 | 0 | 0 | 22,130,000 | ||||||
| Media & Content | ||||||||||||||
| Goodwill [Roll Forward] | ||||||||||||||
| Goodwill, beginning balance | 83,419,000 | 74,523,000 | 83,419,000 | 74,523,000 | ||||||||||
| Goodwill related to the EMC acquisition | 9,703,000 | |||||||||||||
| Impairment loss | 0 | 0 | ||||||||||||
| Adjustment to RMG goodwill | 0 | (812,000) | ||||||||||||
| Foreign currency translation and other | 110,000 | 5,000 | ||||||||||||
| Goodwill, ending balance | 83,529,000 | 83,419,000 | 83,529,000 | 83,419,000 | 74,523,000 | |||||||||
| Gross carrying amount | 83,529,000 | |||||||||||||
| Accumulated impairment loss | 0 | |||||||||||||
| Goodwill, Net | $ 83,529,000 | $ 83,419,000 | $ 83,419,000 | $ 74,523,000 | $ 83,419,000 | $ 74,523,000 | $ 74,523,000 | $ 83,529,000 | ||||||
| Emerging Markets Communications LLC | ||||||||||||||
| Goodwill [Roll Forward] | ||||||||||||||
| Goodwill, ending balance | $ 297,597,000 | |||||||||||||
| Goodwill, Net | 297,597,000 | |||||||||||||
| Working capital settlement adjustment | $ 1,300,000 | $ 1,250,000 | ||||||||||||