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Schedule of Amortizable Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 11, 2015 | Jul. 03, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets |  |  |  |  |  |  |
Fully amortized intangible assets wrote off |  | $ 83,339 | [1],[2] | $ 83,339 |  | $ 98,200 |
Gross Carrying Amount |  |  |  | 414,208 | [3] | 546,388 |
Accumulated Amortization |  |  |  | 306,868 | [3],[4] | 303,227 | [5],[6]
Net Carrying Amount |  |  |  | 100,401 |  | 239,831 |
Universal Robots |  |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |  |
Intangible assets | $ 121,590 |  |  |  |  | $ 121,600 |
Wireless Test |  |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |  |
Fully amortized intangible assets wrote off |  |  |  | 83,339 |  |  |
Net Carrying Amount |  | $ 5,000 |  |  |  |  |
Fully Amortized Intangibles |  |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |  |
Gross Carrying Amount |  |  |  | 48,100 |  |  |
Accumulated Amortization |  |  |  | 48,100 |  |  |
Net Carrying Amount |  |  |  | $ 0 |  |  |
[1] | Restructuring and other includes $4.2 million for an impairment of fixed assets, $0.9 million for expenses related to an earthquake in Kumamoto, Japan, and $1.4 million for the increase in the fair value of contingent consideration liability of which $0.8 million related to Universal Robots, and $0.6 million related to AIT, partially offset by $5.1 million of property insurance recovery related to the Japan earthquake.
[2] | Teradyne recorded pension and post retirement net actuarial (gains) losses of $(1.2) million, $(0.7) million, $0.7 million and $(2.0) million for the first, second, third and fourth quarter in 2016, respectively. See Note B: "Accounting Policies" for a discussion of Teradyne's accounting policy.
[3] | During the year ended December 31, 2016, Teradyne recorded an $83.3 million impairment of Wireless Test amortizable intangible assets. The impairment assets have been eliminated from the gross carrying amount and accumulated amortization.
[4] | In 2016, $48.1 million of amortizable intangible assets became fully amortized and has been eliminated from the gross carrying amount and accumulated amortization.
[5] | During the year ended December 31, 2015, Teradyne recorded intangible assets in the amount of $121.6 million related to its Universal Robots acquisition.
[6] | During the year ended December 31, 2015, Teradyne wrote off $98.2 million of fully amortized intangible assets.

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