SEGMENT, GEOGRAPHIC, MAJOR CUSTOMER AND PRODUCT INFORMATION (Schedule of Long-Lived Assets) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	[1]	$ 119,329	$ 51,182	$ 36,122
ISRAEL
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		59,126	43,273	35,055
KOREA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		41,268
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		10,433	5,985	36
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		6,600	1,219	466
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		1,369	567	515
Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets		$ 533	$ 138	$ 50

[1] Long-lived assets are comprised of property and equipment, net (marketable securities, other non-current assets, goodwill, intangible assets and deferred tax assets are not included).