INCOME TAXES (NARRATIVE) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement Narrative [Line Items]
Tax Cuts and Jobs Act, Other Tax Effect, Description								In 2017, the United States enacted comprehensive tax reform legislation known as the Tax Cuts and Jobs Act (the "2017 Tax Act") that, among other things, reduces the U.S. federal corporate income tax rate from 35% to 21% and implements a territorial tax system, but imposes an alternative "base erosion and anti-abuse tax" ("BEAT"), and an incremental tax on global intangible low taxed foreign income ("GILTI") effective January 1, 2018. In addition, the law imposed a one-time mandatory repatriation tax on accumulated post-1986 foreign earnings on domestic corporations effective for the 2017 tax year.
Tax Cuts and Jobs Act, Accounting Complete [true false]					true				true
Tax Cuts and Jobs Act, Accounting Complete, Date					Dec. 31, 2018				Dec. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent								21.00%	21.00%	35.00%
Effective income tax rate								21.00%	21.00%	35.00%
Total deferred tax assets, net	$ 60,392				$ 45,295			$ 60,392	$ 45,295
Valuation allowances	17,051				10,867			$ 17,051	10,867	$ 9,526	$ 9,949
Net Change in Valuation Allowance	2,200		$ 2,300		1,500
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								$ 8,400	$ 8,200	$ 11,900
Diluted Net Income Per Share Effect For Income Tax Holiday Jurisdictions								$ 0.18	$ 0.18	$ 0.26
Total Interest and Penalties Accrued Related to Uncertain Tax Positions Recorded in Balance Sheets	2,100				1,400			$ 2,100	$ 1,400	$ 1,800
Reserve for Uncertain Tax Benefits, Net								4,800	$ 4,800
Decrease of Unrecognized Tax Benefits over Next 12 Months	6,800							6,800
Decrease in Unrecognized Tax Benefits is Reasonably Possible	1,400							1,400
Tax Adjustments, Settlements, and Unusual Provisions	1,600	$ 200	$ 100	$ 100	3,000	$ 200	$ 500
Expired statute of limitations [Member]
Income Statement Narrative [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions		$ 2,000					$ 1,100
New uncertain tax positions
Income Statement Narrative [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions					$ 3,600
United States [Member]
Income Statement Narrative [Line Items]
Total deferred tax assets, net	3,900							$ 3,900
Income Tax Examination Years Under Audit								2017
Foreign Jurisdictions [Member]
Income Statement Narrative [Line Items]
Total deferred tax assets, net	$ 6,600							$ 6,600
Canada [Member]
Income Statement Narrative [Line Items]
Income Tax Examination Years Under Audit								2009 and 2010
Brazil and Canada
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								$ 4,600
United Kingdom Ireland Canada Luxembourg Turkey United States Australia [Member] | Not Realizable Standard [Member]
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								$ 2,700
NEW YORK
Income Statement Narrative [Line Items]
Income Tax Examination Years Under Audit								2015 through 2017
Argentina New Zealand the Netherlands | Not Realizable Standard [Member]
Income Statement Narrative [Line Items]
Net Change in Valuation Allowance								$ (1,100)