NET INCOME PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Reconciliation of the numerator and denominator of basic and diluted net income per share
Net (loss) income	$ (47,667)	$ 20,387
Weighted-average shares - basic	428,999	440,265
Dilutive effect of incremental shares and share equivalents	0	4,662
Weighted-average shares - diluted	428,999	444,927
Basic
Net (loss) income per share	$ (0.11)	$ 0.05
Diluted
Net (loss) income per share	$ (0.11)	$ 0.05
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 (in shares)	9,818	2,842

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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