INCOME TAXES (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Anticipated change in unrecognized tax benefits
U.S. tax impact of foreign operations	6.70%	12.30%
Deferred tax assets, valuation allowance	$ 15,262,000	$ 21,388,000
Decrease in valuation allowance, deferred tax asset	6,100,000
Foreign tax and withholding credits	14,453,000	14,640,000
Net operating losses	5,978,000	7,139,000
Unrecognized tax benefits that would impact effective tax rate	100,000	1,500,000
Unrecognized tax benefits, income tax penalties and interest accrued	36,000	100,000
Unrecognized tax benefits, income tax penalties and interest expense period decrease	100,000	33,000
Unrecognized tax benefits, increase in period	0	200,000
Unrecognized tax benefits, income tax penalties and interest expense	0	100,000
Income tax benefit resulting from lapse of applicable statute of limitations	1,300,000	$ 800,000
Commissions and transfer pricing | Minimum
Anticipated change in unrecognized tax benefits
Increase in unrecognized tax benefits within the next twelve months	0
Commissions and transfer pricing | Maximum
Anticipated change in unrecognized tax benefits
Increase in unrecognized tax benefits within the next twelve months	100,000
Audits or the expiration of statutes of limitations in various foreign jurisdictions | Minimum
Anticipated change in unrecognized tax benefits
Decrease in unrecognized tax benefits within the next twelve months	0
Audits or the expiration of statutes of limitations in various foreign jurisdictions | Maximum
Anticipated change in unrecognized tax benefits
Decrease in unrecognized tax benefits within the next twelve months	100,000
Domestic Tax Authority
Anticipated change in unrecognized tax benefits
Decrease in valuation allowance, deferred tax asset	2,700,000
Foreign Tax Authority
Anticipated change in unrecognized tax benefits
Decrease in valuation allowance, deferred tax asset	3,400,000
Foreign tax and withholding credits	$ 14,100,000