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Segment, Product and Geographic Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating segments [line items] |  |  |
Segment revenues | $ 887,282 | $ 671,835 | $ 723,605
Segment operating income (loss) | 57,926 | (18,307) | 3,385
Non operating income, net | (1,054) | 2,539 | 3,635
Consolidated profits before income taxes | 56,872 | (15,768) | 7,020
Significant noncash items: |  |  |
Share-based compensation | 763 | 457 | 408
Depreciation and amortization | 23,596 | 24,399 | 20,327
Driver IC [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Segment revenues | 756,522 | 544,727 | 586,258
Segment operating income (loss) | 98,687 | 29,070 | 56,023
Significant noncash items: |  |  |
Share-based compensation | 481 | 221 | 189
Depreciation and amortization | 5,959 | 5,511 | 3,248
Non-driver products [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Segment revenues | 130,760 | 127,108 | 137,347
Segment operating income (loss) | (40,761) | (47,377) | (52,638)
Significant noncash items: |  |  |
Share-based compensation | 282 | 236 | 219
Depreciation and amortization | $ 17,637 | $ 18,888 | $ 17,079

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