NET INCOME (LOSS) PER SHARE (Details) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Reconciliation of the numerator and denominator of basic and diluted net income (loss) per share
Net income (loss)	$ 90,870	$ (36,443)	$ 165,423	$ (19,828)
Weighted-average shares - basic (in shares)	456,753	460,249	456,622	458,508
Incremental shares and share equivalents (in shares)	13,129		13,519
Weighted-average shares - diluted (in shares)	469,882	460,249	470,141	458,508
Basic
Net income (loss) per share - basic (in dollars per share)	$ 0.20	$ (0.08)	$ 0.36	$ (0.04)
Diluted
Net income (loss) per share - diluted (in dollars per share)	$ 0.19	$ (0.08)	$ 0.35	$ (0.04)
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)	1,663	40,960	1,417	41,598

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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