v2.4.0.6

SHARE-BASED COMPENSATION - RSU Activity (Details) (USD $) | 6 Months Ended
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Jun. 30, 2012 number | Jun. 30, 2011
Number of Restricted Stock Units [Roll Forward] |  |
RSUs beginning | 1,860,577 |
RSUs awarded | 288,056 |
RSUs released | (329,755) |
RSUs forfeited | (13,014) |
RSUs ending | 1,805,864 |
Weighted Average Purchase Price RSUs | $ 0 |
Weighted Average Remaining Contractual Term (Years) RSUs | 1.5 |
Aggregate Intrinsic Value RSUs | $ 10,871,301 |
Number of RSUs vested and expected to vest | 1,659,512 |
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 | 9,466,549 |
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 | 523,716 |
Weighted average remaining recognition period in years | 2.1 |
Unamortized compensation expense, net of estimated forfeitures | 7,854,915 |
Other Options Disclosure [Abstract] |  |
Intrinsic value of options exercised | 331,000 | 512,000
Tax benefit from options exercised, before impact of valuation allowance | 126,000 | 195,000
Cash received from exercise price of options exercised | $ 89,000 | $ 66,000

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