v2.4.0.6

SHARE-BASED COMPENSATION 1 (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 number | Dec. 31, 2010 | Dec. 31, 2009
Number of Restricted Stock Units [Roll Forward] |  |  |
RSUs beginning | 2,329,174 |  |
RSUs awarded | 445,213 |  |
RSUs released | (885,878) |  |
RSUs forfeited | (27,932) |  |
RSUs ending | 1,860,577 | 2,329,174 |
Weighted Average Purchase Price RSUs | $ 0 |  |
Weighted Average Remaining Contractual Term (Years) RSUs | 1.5 |  |
Aggregate Intrinsic Value RSUs | $ 11,442,549 |  |
Number of RSUs vested and expected to vest | 1,705,617 |  |
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 | 1.4 |  |
Aggregate Intrinsic Value RSUs vested and expected to vest | 9,954,522 |  |
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 | 535,025 |  |
Weighted average remaining recognition period in years | 2.1 |  |
Unamortized compensation expense, net of estimated forfeitures | 8,646,401 |  |
Other Options Disclosure [Abstract] |  |  |
Cash received from exercise price of options exercised | $ 71,000 | $ 130,000 | $ 0

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