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STOCK BASED COMPENSATION - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Stock Options [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation expenses related to non-vested option awards $ 42.0
Weighted average period of recognition for unrecognized compensation expenses 3 years 5 months 16 days
Restricted Stock Units (RSUs) [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation expenses related to RSUs $ 5.1
Weighted average period of recognition for unrecognized compensation expenses 3 years 7 months 13 days
Ratio of share reserve related to RSUs granted 2
Restricted Stock Units (RSUs) [Member] | Minimum
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
Restricted Stock Units (RSUs) [Member] | Maximum
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 5 years