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Operating Segment, Geographic and Significant Customer Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Information | Segment information for the years ended December 31, 2018, 2017, and 2016 is as follows:
|  | Semiconductor Test |  |  | System Test |  |  | Industrial Automation |  |  | Wireless Test |  |  | Corporate And Other |  |  | Consolidated |
|  | (in thousands) |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,492,417 |  |  | $ | 216,132 |  |  | $ | 261,452 |  |  | $ | 132,006 |  |  | $ | (1,205 | ) |  | $ | 2,100,802 |
Income (loss) before taxes (1)(2) |  |  | 397,645 |  |  |  | 48,857 |  |  |  | 7,670 |  |  |  | 29,052 |  |  |  | (15,423 | ) |  |  | 467,801 |
Total assets (3) |  |  | 669,452 |  |  |  | 88,098 |  |  |  | 607,502 |  |  |  | 77,570 |  |  |  | 1,263,984 |  |  |  | 2,706,606 |
Property additions |  |  | 94,496 |  |  |  | 3,469 |  |  |  | 11,188 |  |  |  | 5,226 |  |  |  | — |  |  |  | 114,379 |
Depreciation and amortization expense |  |  | 58,095 |  |  |  | 6,430 |  |  |  | 36,755 |  |  |  | 5,328 |  |  |  | 6,616 |  |  |  | 113,224 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,662,549 |  |  | $ | 192,135 |  |  | $ | 170,056 |  |  | $ | 111,866 |  |  | $ | — |  |  | $ | 2,136,606 |
Income (loss) before taxes (1)(2) |  |  | 491,361 |  |  |  | 10,305 |  |  |  | 8,763 |  |  |  | 17,350 |  |  |  | (3,368 | ) |  |  | 524,411 |
Total assets (3) |  |  | 597,480 |  |  |  | 97,018 |  |  |  | 368,037 |  |  |  | 59,912 |  |  |  | 1,987,098 |  |  |  | 3,109,545 |
Property additions |  |  | 87,920 |  |  |  | 5,976 |  |  |  | 7,044 |  |  |  | 4,435 |  |  |  | — |  |  |  | 105,375 |
Depreciation and amortization expense |  |  | 58,901 |  |  |  | 6,646 |  |  |  | 25,711 |  |  |  | 5,392 |  |  |  | 11,425 |  |  |  | 108,075 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,368,169 |  |  | $ | 189,846 |  |  | $ | 99,031 |  |  | $ | 96,204 |  |  | $ | — |  |  | $ | 1,753,250 |
Income (loss) before taxes (1)(2) |  |  | 311,939 |  |  |  | 28,916 |  |  |  | (16,783 | ) |  |  | (371,409 | ) |  |  | (7,723 | ) |  |  | (55,060 | )
Total assets (3) |  |  | 557,546 |  |  |  | 110,361 |  |  |  | 317,635 |  |  |  | 62,366 |  |  |  | 1,714,585 |  |  |  | 2,762,493 |
Property additions |  |  | 70,543 |  |  |  | 3,788 |  |  |  | 6,755 |  |  |  | 4,186 |  |  |  | — |  |  |  | 85,272 |
Depreciation and amortization expense |  |  | 58,087 |  |  |  | 6,551 |  |  |  | 26,869 |  |  |  | 25,921 |  |  |  | 2,581 |  |  |  | 120,009 |
(1) | Included in Corporate and Other are: contingent consideration adjustments, pension and postretirement plans actuarial gains (losses), severance charges, impairment of fixed assets and expenses related to the Japan earthquake, property insurance recovery, interest income, interest expense, net foreign exchange gains (losses), intercompany eliminations and acquisition related charges.
(2) | Included in income (loss) before taxes are charges and credits related to restructuring and other, and inventory charges. In 2016, loss before income taxes in Wireless Test also included charges related to goodwill and acquired intangible assets impairment.
(3) | Total assets are attributable to each segment. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.
Revenues by Country | Information as to Teradyne’s revenues by country is as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Revenues from customers (1): |  |  |  |  |  |  |  |  |  |  |  |
Taiwan |  | $ | 516,322 |  |  | $ | 687,031 |  |  | $ | 653,076 |
China |  |  | 348,942 |  |  |  | 260,451 |  |  |  | 174,876 |
United States |  |  | 282,869 |  |  |  | 252,516 |  |  |  | 221,948 |
Europe |  |  | 223,207 |  |  |  | 163,715 |  |  |  | 117,671 |
Korea |  |  | 163,224 |  |  |  | 206,819 |  |  |  | 147,882 |
Japan |  |  | 158,281 |  |  |  | 169,093 |  |  |  | 135,978 |
Malaysia |  |  | 122,797 |  |  |  | 124,048 |  |  |  | 103,472 |
Singapore |  |  | 108,618 |  |  |  | 101,085 |  |  |  | 73,172 |
Philippines |  |  | 77,996 |  |  |  | 105,850 |  |  |  | 54,705 |
Thailand |  |  | 59,184 |  |  |  | 29,566 |  |  |  | 43,097 |
Rest of the World |  |  | 39,362 |  |  |  | 36,432 |  |  |  | 27,373 |
|  | $ | 2,100,802 |  |  | $ | 2,136,606 |  |  | $ | 1,753,250 |
(1) | Revenues attributable to a country are based on location of customer site.
Long-Lived Assets by Geographic Area | Long-lived assets by geographic area:
|  | United States |  |  | Foreign(1) |  |  | Total |
|  | (in thousands) |
December 31, 2018 |  | $ | 209,368 |  |  | $ | 70,453 |  |  | $ | 279,821 |
December 31, 2017 |  | $ | 198,855 |  |  | $ | 69,592 |  |  | $ | 268,447 |
(1) | As of December 31, 2018 and 2017, long-lived assets attributable to Singapore were $19.4 million and $23.6 million, respectively.
Wireless Test |
Schedule of Segment Reporting Information by Segment Charges | Included in the Wireless Test segment are charges in the following accounts:
|  | For the Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Cost of revenues—inventory charge |  | $ | 2,565 |  |  | $ | 2,190 |  |  | $ | 7,207 |
Restructuring and other—lease impairment |  |  | — |  |  |  | 972 |  |  |  | — |
Restructuring and other—employee severance |  |  | — |  |  |  | — |  |  |  | 2,650 |
Goodwill impairment charge |  |  | — |  |  |  | — |  |  |  | 254,946 |
Intangible assets impairment charge |  |  | — |  |  |  | — |  |  |  | 83,339 |
Semiconductor Test |
Schedule of Segment Reporting Information by Segment Charges | Included in the Semiconductor Test segment are charges in the following accounts:
|  | For the Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Restructuring and other—employee severance |  | $ | 8,429 |  |  | $ | 1,779 |  |  | $ | 2,860 |
Cost of revenues—inventory charge |  |  | 6,822 |  |  |  | 4,606 |  |  |  | 9,656 |
Restructuring and other—impairment of fixed assets |  |  | — |  |  |  | 1,124 |  |  |  | — |
System Test |
Schedule of Segment Reporting Information by Segment Charges | Included in the System Test segment are charges in the following accounts:
|  | For the Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Cost of revenues—inventory charge |  | $ | 1,175 |  |  | $ | 1,918 |  |  | $ | 630 |
Industrial Automation |
Schedule of Segment Reporting Information by Segment Charges | Included in the Industrial Automation segment are charges in the following accounts:
|  | For the Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Restructuring and other—acquisition related expenses and compensation |  | $ | 1,163 |  |  | $ | — |  |  | $ | — |
Cost of revenues—inventory charge |  |  | 680 |  |  |  | — |  |  |  | — |
Restructuring and other—employee severance |  |  | — |  |  |  | 1,414 |  |  |  | 585 |
Corporate And Eliminations |
Schedule of Segment Reporting Information by Segment Charges | Included in Corporate and Other are charges and credits in the following accounts:
|  | For the Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (in thousands) |
Restructuring and other—MiR contingent consideration adjustment |  | $ | 17,666 |  |  | $ | — |  |  | $ | — |
Restructuring and other—Universal Robots contingent consideration adjustment |  |  | (16,679 | ) |  |  | 7,820 |  |  |  | 15,346 |
Restructuring and other—acquisition related expenses |  |  | 3,422 |  |  |  | — |  |  |  | — |
Restructuring and other |  |  | 872 |  |  |  | — |  |  |  | — |
Restructuring and other—expense related to Japan earthquake and impairment of fixed assets |  |  | — |  |  |  | 755 |  |  |  | 5,051 |
Restructuring and other—property insurance recovery |  |  | — |  |  |  | (5,064 | ) |  |  | (5,051 | )

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