SHARE-BASED COMPENSATION 1 (Details) (USD $)	9 Months Ended
Sep. 30, 2011 number	Sep. 30, 2010
Number of Restricted Stock Units [Roll Forward]
RSUs beginning	2,329,174
RSUs awarded	445,213
RSUs released	(868,211)
RSUs forfeited	(23,057)
RSUs ending	1,883,119
Weighted Average Purchase Price RSUs	$ 0
Weighted Average Remaining Contractual Term (Years) RSUs	1.7
Aggregate Intrinsic Value RSUs	$ 9,886,375
Number of RSUs vested and expected to vest	1,698,384
Weighted Average Purchase Price of RSUs vested and expected to vest	$ 0
Weighted Average Remaining Contractual Term (Years) of RUSs vested and expected to vest	1.7
Aggregate Intrinsic Value RSUs vested and expected to vest	8,459,788
Number of RSUs exercisable	86,996
Weighted Average Purchase Price of RUSs exercisable	$ 0
Weighted Average Remaining Contractual Term (Years) of RUSs exercisable	0.0
Aggregate Intrinsic Value RSUs exercisable	456,729
Weighted average remaining recognition period in years	2.3
Unamortized compensation expense, net of estimated forfeitures	10,016,230
Other Options Disclosure [Abstract]
Intrinsic value of options exercised	520,000	811,000
Tax benefit from options exercised, before impact of valuation allowance	198,000	320,000
Cash received from exercise price of options exercised	$ 69,000	$ 115,000

Share based compensation for restricted stock units aggregate instinsic value.

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Unamortized compensation expense for restricted stock units net of estimated forfeitures.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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