CONCENTRATION OF RISK, Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	[1]	Sep. 30, 2015	Jun. 30, 2015	[1]	Mar. 31, 2015	Dec. 31, 2014	[2]	Sep. 30, 2014	Jun. 30, 2014	[2]	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Concentration Risk [Line Items]
Revenues	$ 62,312		$ 39,419	$ 58,092		$ 31,223	$ 56,173		$ 32,892	$ 64,127		$ 37,839	$ 191,046	$ 191,031	$ 146,639
UNITED STATES
Concentration Risk [Line Items]
Revenues													1,218	706	1,552
South Korea [Member]
Concentration Risk [Line Items]
Revenues													168,267	141,922	102,948
Japan [Member]
Concentration Risk [Line Items]
Revenues													16,542	44,903	40,539
Taiwan [Member]
Concentration Risk [Line Items]
Revenues													2,175	1,596	904
Other [Member]
Concentration Risk [Line Items]
Revenues													2,844	1,904	696
All Countries [Domain]
Concentration Risk [Line Items]
Revenues													$ 189,828	$ 190,325	$ 145,087

[1] (1) The Company receives significant license revenue in the second and fourth quarters; see Note 2 for further details.

[2] (1) The Company receives significant license revenue in the second and fourth quarters; see Note 2 for further details.