NET INCOME PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reconciliation of the numerator and denominator of basic and diluted net income per share
Net income (loss)	$ 2,166	$ (47,667)
Weighted-average shares - basic	425,390	428,999
Dilutive effect of incremental shares and share equivalents	1,886	0
Weighted-average shares - diluted	427,276	428,999
Basic
Net income per share (in dollars per share)	$ 0.01	$ (0.11)
Diluted
Net income (loss) per share	$ 0.01	$ (0.11)
Anti-dilutive securities not included in the "Weighted-average shares - diluted" used for calculation of diluted net income per share
Employee stock options and restricted stock units outstanding	4,788	9,818