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SEGMENT INFORMATION, Depreciation and Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | $ 17,445 | $ 18,718 | $ 52,525 | $ 53,402
Capital expenditures | 11,214 | 10,305 | 38,965 | 35,019
Reportable Geographic Region [Member] | Mainland China [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 3,550 | 4,218 | 11,202 | 12,362
Capital expenditures | 688 | 1,711 | 2,351 | 8,709
Reportable Geographic Region [Member] | South Korea [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 1,586 | 1,773 | 4,872 | 5,137
Capital expenditures | 0 | 141 | 464 | 520
Reportable Geographic Region [Member] | Americas [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 341 | 672 | 1,319 | 2,010
Capital expenditures | 133 | 96 | 697 | 585
Reportable Geographic Region [Member] | South Asia/Pacific [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 585 | 636 | 1,733 | 1,796
Capital expenditures | 284 | 235 | 814 | 1,978
Reportable Geographic Region [Member] | Japan [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 898 | 1,002 | 2,677 | 2,848
Capital expenditures | 109 | 49 | 206 | 916
Reportable Geographic Region [Member] | Hong Kong/Taiwan [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 353 | 558 | 999 | 1,669
Capital expenditures | 2 | 179 | 1,119 | 444
Reportable Geographic Region [Member] | EMEA [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 226 | 356 | 820 | 1,027
Capital expenditures | 571 | 131 | 882 | 798
Corporate and Other [Member] |  |  |  |
Summarized Financial Information [Abstract] |  |  |  |
Depreciation and amortization | 9,906 | 9,503 | 28,903 | 26,553
Capital expenditures | $ 9,427 | $ 7,763 | $ 32,432 | $ 21,069

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