OPERATING SEGMENTS AND GEOGRAPHIC INFORMATION (Information Related To Reportable Operating Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 312,766	$ 261,064	$ 967,614	$ 872,216
Total income from operations	39,884	13,895	120,293	76,881
Foreign currency gains (losses), net	585	233	(893)	1,587
Interest income	167	422	493	847
Interest expense	(2,505)	(126)	(6,743)	(371)
Other income (expense), net	(34)	160	(48)	229
Income before income taxes	38,097	14,584	113,102	79,173
Total consolidated depreciation and amortization	5,643	6,661	17,508	21,535
Total long-lived assets	274,062		274,062		$ 69,515
Total consolidated assets	685,515		685,515		468,901
Americas
Segment Reporting Information [Line Items]
Total consolidated revenues	185,192	136,957	484,758	398,549
Asia Pacific
Segment Reporting Information [Line Items]
Total consolidated revenues	74,251	75,163	283,722	288,645
EMEA
Segment Reporting Information [Line Items]
Total consolidated revenues	53,274	47,419	198,959	182,889
Reportable Operating Segments
Segment Reporting Information [Line Items]
Total consolidated revenues	312,717	259,539	967,439	870,083
Total income from operations	93,507	71,511	286,402	239,273
Total consolidated depreciation and amortization	1,294	1,821	3,919	6,248
Total long-lived assets	171,132		171,132		17,933
Total consolidated assets	515,932		515,932		362,716
Reportable Operating Segments | Americas
Segment Reporting Information [Line Items]
Total consolidated revenues	185,192	136,957	484,758	398,549
Total income from operations	66,760	42,586	157,314	110,814
Total consolidated depreciation and amortization	849	1,098	2,627	3,613
Total long-lived assets	133,352		133,352		12,977
Total consolidated assets	331,539		331,539		157,016
Reportable Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total consolidated revenues	74,251	75,163	283,722	288,645
Total income from operations	13,124	16,861	67,888	74,640
Total consolidated depreciation and amortization	254	422	686	1,655
Total long-lived assets	23,123		23,123		1,831
Total consolidated assets	105,866		105,866		139,679
Reportable Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total consolidated revenues	53,274	47,419	198,959	182,889
Total income from operations	13,623	12,064	61,200	53,819
Total consolidated depreciation and amortization	191	301	606	980
Total long-lived assets	14,657		14,657		3,125
Total consolidated assets	78,527		78,527		66,021
Reportable Operating Segments | Other businesses
Segment Reporting Information [Line Items]
Total consolidated revenues	49	1,525	175	2,133
Total income from operations	(11,958)	(14,092)	(38,428)	(41,557)
Total consolidated depreciation and amortization	965	1,213	3,346	4,168
Unallocated corporate and other
Segment Reporting Information [Line Items]
Total income from operations	(41,665)	(43,524)	(127,681)	(120,835)
Total consolidated depreciation and amortization	3,384	$ 3,627	10,243	$ 11,119
Total long-lived assets	45,736		45,736		39,586
Total consolidated assets	98,998		98,998		75,077
Supply Chain
Segment Reporting Information [Line Items]
Total long-lived assets	57,194		57,194		11,996
Total consolidated assets	$ 70,585		$ 70,585		$ 31,108