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Schedule of Revenues by Country (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | [1],[2] | Oct. 02, 2016 | [2],[3] | Jul. 03, 2016 | [2],[4] | Apr. 03, 2016 | [2],[5] | Dec. 31, 2015 | [6],[7] | Oct. 04, 2015 | [8] | Jul. 05, 2015 | [9] | Apr. 05, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers |  | $ 379,989 | $ 410,475 | $ 531,792 | $ 430,994 | $ 318,444 | $ 465,994 | $ 512,739 | $ 342,401 | $ 1,753,250 | [10] | $ 1,639,578 | [10] | $ 1,647,824 | [10]
TAIWAN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 653,076 |  | 436,389 |  | 495,942 |
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 221,948 |  | 217,386 |  | 213,104 |
CHINA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 174,876 |  | 264,898 |  | 292,145 |
KOREA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 147,882 |  | 120,224 |  | 145,608 |
JAPAN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 135,978 |  | 128,228 |  | 63,761 |
Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 117,671 |  | 111,903 |  | 111,043 |
MALAYSIA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 103,472 |  | 76,707 |  | 83,910 |
SINGAPORE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 73,172 |  | 105,216 |  | 119,421 |
PHILIPPINES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 54,705 |  | 96,103 |  | 68,662 |
THAILAND |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | 43,097 |  | 59,104 |  | 44,117 |
Rest Of The World |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from unaffiliated customers | [10] |  |  |  |  |  |  |  |  | $ 27,373 |  | $ 23,420 |  | $ 10,111 |
[1] | Restructuring and other includes a $5.4 million fair value adjustment to increase the Universal Robots acquisition contingent consideration.
[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] | Restructuring and other includes an $8.0 million fair value adjustment to increase the Universal Robots acquisition contingent consideration.
[4] | 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.
[5] | Restructuring and other includes a $1.2 million fair value adjustment to increase the Universal Robots acquisition contingent consideration.
[6] | In the fourth quarter ended December 31, 2015, Teradyne recorded pension and post retirement net actuarial losses of $17.7 million. See Note B: "Accounting Policies" for a discussion of Teradyne's accounting policy.
[7] | Restructuring and other includes a $5.3 million fair value adjustment to increase the Universal Robots acquisition contingent consideration, and a $(0.3) million fair value adjustment to decrease the AIT acquisition contingent consideration.
[8] | Restructuring and other includes a $(1.0) million fair value adjustment to decrease the AIT acquisition contingent consideration.
[9] | Restructuring and other includes a $(1.6) million fair value adjustment to decrease the ZTEC acquisition contingent consideration.
[10] | Revenues attributable to a country are based on location of customer site.

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