BASIC AND DILUTED NET INCOME PER SHARE (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
BASIC AND DILUTED NET INCOME PER SHARE
Weighted-average common shares outstanding used in calculation of basic earnings per share	93,316	86,116	93,175	69,054
Dilutive stock options			878	755
Shares potentially issuable as deferred acquisition consideration			8,282
Weighted-average common shares outstanding used in calculation of diluted earnings per share	93,316	86,116	102,335	69,809
Weighted-average outstanding stock options and warrants not included in diluted net income per share calculation as they had an antidilutive effect	15,682	14,877	12,114	9,764
Change in deferred acquisition consideration recorded in general and administrative expenses			$ 206,000

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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+ Details

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details