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INCOME TAXES (NARRATIVE) (DETAILS) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total deferred tax assets, net | $ 34,758 |  |  |  | $ 71,754 |  |  |  | $ 34,758 | $ 71,754 |  |
Valuation allowances | 9,526 |  |  |  | 9,949 |  |  |  | $ 9,526 | 9,949 | $ 10,139 | $ 10,721
Net Change in Valuation Allowance | 600 |  |  |  | 400 |  | $ 1,000 | $ 100 |  |  |  |
Income Tax Holidays Description |  |  |  |  |  |  |  |  | The Company has been granted "Tax Holidays" as an incentive to attract foreign investment by the governments of the Philippines and Costa Rica. Generally, a Tax Holiday is an agreement between the Company and a foreign government under which the Company receives certain tax benefits in that country, such as exemption from taxation on profits derived from export-related activities. In the Philippines, the Company has been granted multiple agreements with an initial period of four years and additional periods for varying years, expiring at various times between 2017 and 2019. |  |  |
Income Tax Holiday Termination Date |  |  |  |  |  |  |  |  | 2017 and 2019 |  |  |
Aggregate Effect on Income Tax Expense for Income Tax Holiday Jurisdictions |  |  |  |  |  |  |  |  | $ 11,900 | $ 12,400 | $ 12,200 |
Diluted Net Income Per Share Effect For Income Tax Holiday Jurisdictions |  |  |  |  |  |  |  |  | $ 0.26 | $ 0.27 | $ 0.25 |
Total Interest and Penalties Accrued Related to Uncertain Tax Positions Recorded in Balance Sheets | 1,800 |  |  |  | $ 693 |  |  |  | $ 1,800 | $ 693 | $ 709 |
Reserve for Uncertain Tax Benefits, Net |  |  |  |  |  |  |  |  | 3,300 | $ 3,500 |  |
Decrease of Unrecognized Tax Benefits over Next 12 Months | 5,100 |  |  |  |  |  |  |  | 5,100 |  |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 3,900 |  |  |  |  |  |  |  | 3,900 |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 300 | $ (200) | $ 700 | $ (300) |  |  |  |  |  |  |  |
Settlement with Taxing Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions |  |  |  |  |  | $ 800 |  |  |  |  |  |
Expired statute of limitations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions |  |  |  |  |  | $ 500 | $ 300 |  |  |  |  |
State Tax Credits And Nol [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net Change in Valuation Allowance |  |  |  |  |  |  |  |  | 100 |  |  |
United States |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total deferred tax assets, net | 4,200 |  |  |  |  |  |  |  | $ 4,200 |  |  |
Income Tax Examination Years Under Audit |  |  |  |  |  |  |  |  | 2014 through 2016 |  |  |
Foreign Jurisdictions |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total deferred tax assets, net | $ 3,500 |  |  |  |  |  |  |  | $ 3,500 |  |  |
Canada |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination Years Under Audit |  |  |  |  |  |  |  |  | 2009 and 2010 |  |  |
United Kingdom Ireland Australia | Not Realizable Standard [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net Change in Valuation Allowance |  |  |  |  |  |  |  |  | $ 2,100 |  |  |
Argentina New Zealand Belgium Turkey UK | Not Realizable Standard [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Narrative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net Change in Valuation Allowance |  |  |  |  |  |  |  |  | $ (2,500) |  |  |

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