Annual report pursuant to Section 13 and 15(d)

Awards Granted Assumptions (Detail)

v2.4.0.8
Awards Granted Assumptions (Detail)
12 Months Ended
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rates, minimum 0.80%
Risk-free interest rates, maximum 2.50%
Dividend yield 0.00%
Expected volatility, minimum 48.00%
Expected volatility, maximum 53.00%
Minimum
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected option life (in years) 5 years
Maximum
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected option life (in years) 6 years