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Intangible Assets - Changes in Carrying Amount of Trademarks (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Indefinite-lived Intangible Assets [Line Items] |  |  |
Goodwill | $ 1,385,995 | $ 1,385,115 | $ 943,374
Goodwill, Acquired During Period | 8,492 | 476,040 |
Goodwill, Foreign Currency Translation Gain (Loss) | (2,135) | (34,299) |
Goodwill, Written off Related to Sale of Business Unit | 5,477 |  |
Broadcast Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Goodwill | 544,042 | 536,388 | 550,362
Goodwill, Acquired During Period | 8,492 | 11,481 |
Goodwill, Foreign Currency Translation Gain (Loss) | (838) | (25,455) |
Goodwill, Written off Related to Sale of Business Unit | 0 |  |
Enterprise Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Goodwill | 73,278 | 73,278 | 73,278
Goodwill, Acquired During Period | 0 | 0 |
Goodwill, Foreign Currency Translation Gain (Loss) | 0 | 0 |
Goodwill, Written off Related to Sale of Business Unit | 0 |  |
Industrial Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Goodwill | 191,322 | 196,719 | 200,053
Goodwill, Acquired During Period | 0 | 1,614 |
Goodwill, Foreign Currency Translation Gain (Loss) | 80 | (4,948) |
Goodwill, Written off Related to Sale of Business Unit | 5,477 |  |
Network Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Goodwill | 577,353 | 578,730 | $ 119,681
Goodwill, Acquired During Period | 0 | 462,945 |
Goodwill, Foreign Currency Translation Gain (Loss) | (1,377) | (3,896) |
Goodwill, Written off Related to Sale of Business Unit | 0 |  |
Trademarks [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Trademarks, Beginning Balance | 129,671 | 103,040 |
Acquisitions and purchase accounting adjustments |  | 31,000 |
Translation impact | (4,794) | (4,369) |
Reclassify to assets held for sale | (2,905) |  |
Trademarks, Ending Balance | 121,972 | 129,671 |
Trademarks [Member] | Broadcast Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Trademarks, Beginning Balance | 80,922 | 83,120 |
Acquisitions and purchase accounting adjustments |  | 0 |
Translation impact | (4,635) | (2,198) |
Reclassify to assets held for sale | 0 |  |
Trademarks, Ending Balance | 76,287 | 80,922 |
Trademarks [Member] | Enterprise Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Trademarks, Beginning Balance | 4,063 | 4,063 |
Acquisitions and purchase accounting adjustments |  | 0 |
Translation impact | 0 | 0 |
Reclassify to assets held for sale | 0 |  |
Trademarks, Ending Balance | 4,063 | 4,063 |
Trademarks [Member] | Industrial Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Trademarks, Beginning Balance | 9,090 | 10,744 |
Acquisitions and purchase accounting adjustments |  | 0 |
Translation impact | 40 | (1,654) |
Reclassify to assets held for sale | (2,905) |  |
Trademarks, Ending Balance | 6,225 | 9,090 |
Trademarks [Member] | Network Solutions [Member] |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Trademarks, Beginning Balance | 35,596 | 5,113 |
Acquisitions and purchase accounting adjustments |  | 31,000 |
Translation impact | (199) | (517) |
Reclassify to assets held for sale | 0 |  |
Trademarks, Ending Balance | $ 35,397 | $ 35,596 |

X
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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