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INCOME TAXES (NARRATIVE) (DETAILS) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2015
Income Tax Narrative [Line Items]            
Income Tax Examination, Penalties and Interest Accrued           $ 1,750
Total deferred tax assets, net of valuation allowance $ 55,300     $ 55,300    
Valuation allowance on deferred tax assets 9,900     9,900    
Deferred tax assets, net of valuation allowance and deferred tax liabilities $ 53,200     $ 53,200    
Effective income tax rate (6.90%)   8.70% 15.20% 21.90%  
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 2011 and 2020.    
Income Tax Holiday Termination Date       2011 and 2020    
Aggregate Effect on Income Tax Expense for Income Tax Holiday Jurisdictions $ 2,000   $ 1,800 $ 4,500 $ 4,100  
Diluted Net Income Per Share Effect For Income Tax Holiday Jurisdictions $ 0.04   $ 0.04 $ 0.10 $ 0.09  
Settlement with Taxing Authority [Member]            
Income Tax Narrative [Line Items]            
Tax Adjustments, Settlements, and Unusual Provisions $ 800          
Expired statute of limitations [Member]            
Income Tax Narrative [Line Items]            
Tax Adjustments, Settlements, and Unusual Provisions $ 500 $ 300        
United States            
Income Tax Narrative [Line Items]            
Income Tax Years under Audit       2013 to present    
Hong Kong rogenSi            
Income Tax Narrative [Line Items]            
Income Tax Years under Audit       2014,    
Canada            
Income Tax Narrative [Line Items]            
Income Tax Years under Audit       2009 and 2010    
NEW ZEALAND            
Income Tax Narrative [Line Items]            
Income Tax Years under Audit       2013