INCOME TAXES (NARRATIVE) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement Narrative [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent								21.00%	21.00%	21.00%
Effective income tax rate								21.00%	21.00%	21.00%
Total deferred tax assets, net	$ 57,332			$ 60,392				$ 57,332	$ 60,392
Valuation allowances	18,697			17,051				$ 18,697	17,051	$ 10,867	$ 9,526
Net Change in Valuation Allowance	1,000	$ 900	$ 300	2,200		$ 2,300
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 2020 and 2022.
Income Tax Holiday Termination Date								2020 and 2022
Aggregate Effect on Income Tax Expense for Income Tax Holiday Jurisdictions								$ 4,400	$ 8,400	$ 8,200
Diluted Net Income Per Share Effect For Income Tax Holiday Jurisdictions								$ 0.09	$ 0.18	$ 0.18
Total Interest and Penalties Accrued Related to Uncertain Tax Positions Recorded in Balance Sheets	3,000			2,100				$ 3,000	$ 2,100	$ 1,400
Reserve for Uncertain Tax Benefits, Net								7,500	$ 4,800
Decrease of Unrecognized Tax Benefits over Next 12 Months	10,500							10,500
Decrease in Unrecognized Tax Benefits is Reasonably Possible	3,900							3,900
Tax Adjustments, Settlements, and Unusual Provisions	2,300	$ 400	$ 100	$ 1,600	$ 200	$ 100	$ 100
United States [Member]
Income Statement Narrative [Line Items]
Total deferred tax assets, net	1,200							$ 1,200
Income Tax Examination Years Under Audit								2017 and 2018
Foreign Jurisdictions [Member]
Income Statement Narrative [Line Items]
Total deferred tax assets, net	$ 8,500							$ 8,500
Canada [Member]
Income Statement Narrative [Line Items]
Income Tax Examination Years Under Audit								2009 and 2010
Philippines [Member]
Income Statement Narrative [Line Items]
Income Tax Examination Years Under Audit								2017 and 2018
New Zealand and United Kingdom [Member]
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								$ 1,100
UK Ireland Canada Luxembourg Turkey, US and Australia [Member] | Not Realizable Standard [Member]
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								3,600
Luxembourg Ireland and Various [Member] | Not Realizable Standard [Member]
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								$ (1,900)
NEW YORK
Income Statement Narrative [Line Items]
Income Tax Examination Years Under Audit								2015 through 2017