INCOME TAXES (TAX RATE RECONCILIATION TABLE) (Details) - USD ($) $ 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	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective tax rate reconciliation
Income tax per U.S. federal statutory rate (21%, 21%, 35%)									$ 23,186	$ 11,810	$ 31,110
State income taxes, net of federal deduction									3,144	2,003	460
Change in valuation allowances									9,832	2,191	(924)
Foreign income taxes at different rates than the U.S.									(3,356)	(3,758)	(14,417)
Foreign withholding taxes									600	785	323
Losses in international markets without tax benefits									(2,651)	(68)	1,098
Nondeductible compensation under Section 162(m)									668	615	647
Liabilities for uncertain tax positions									661	1,105	1,607
Permanent difference related to foreign exchange gains									36	136	142
(Income)/losses of foreign branch operations									55	475	(824)
Non-taxable earnings of minority interest									(1,294)	(594)	(1,030)
Foreign dividend less foreign tax credits									(1,681)	(1,748)	(4,798)
Decrease (increase) to deferred tax asset - change in state tax rate	$ 2,800								(2,848)	(1,944)	1,101
State income tax credits									(1,176)	19	207
Foreign earnings taxed currently in U.S.									2,172	3,976	3,143
Taxes related to prior year filings									(1,643)	(1,659)	(865)
Tax related to acquisition accounting									978	2,110	0
Transition tax											61,569
Other					$ 900	$ 100		$ 200	(1,006)	1,029	(474)
Income Tax Expense (Benefit), Total	$ 5,670	$ 5,196	$ 7,345	$ 7,466	$ 11,835	$ 1,893	$ 653	$ 2,102	$ 25,677	$ 16,483	$ 78,075
Effective income tax rate									23.30%	29.30%	87.80%