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SEGMENT REPORTING (Schedule of Segment Reporting Infomation by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 13, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 253,335 | $ 234,636 | $ 199,574 |  |
Operating income | 62,378 | 56,535 | 47,998 |  |
Assets | 137,660 | 112,576 | 100,570 |  |
Goodwill | 62,896 | 3,777 | 3,406 | [1] | $ 59,402
Expenditures for assets | 16,214 | 10,027 | 9,331 |  |
Depreciation and amortization | 9,116 | 10,358 | 9,160 |  |
Telematics Services [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 181,357 | 169,752 | 141,940 |  |
Operating income | 56,913 | 55,012 | 44,045 |  |
Assets | 101,305 | 95,384 | 84,777 |  |
Goodwill | 55,069 | 1,732 | 1,562 |  |
Expenditures for assets | 15,677 | 9,346 | 9,063 |  |
Depreciation and amortization | 8,630 | 10,030 | 8,980 |  |
Telematics Products [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 71,978 | 64,884 | 57,634 |  |
Operating income | 5,465 | 1,523 | 3,953 |  |
Assets | 36,355 | 17,192 | 15,793 |  |
Goodwill | 7,827 | 2,045 | 1,844 |  |
Expenditures for assets | 537 | 681 | 268 |  |
Depreciation and amortization | $ 486 | $ 328 | $ 180 |  |
[1] | The accumulated amount of goodwill impairment loss as of December 31, 2018, 2017 and 2016 was US$ 7,098,000.

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