Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Option Activity (Detail)

v2.4.0.8
Stock-Based Compensation - Stock Option Activity (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number of Shares Underlying Options, Outstanding at beginning of period 4,927  
Number of Shares Underlying Options, Granted 1,060  
Number of Shares Underlying Options, Exercised     
Number of Shares Underlying Options, Forfeited (26)  
Number of Shares Underlying Options, Outstanding at end of period 5,961 4,927
Vested and expected to vest - end of period 4,366  
Weighted Average Exercise Price Per Share, Outstanding at beginning of period $ 6.95  
Weighted Average Exercise Price Per Share, Granted $ 6.98  
Weighted Average Exercise Price Per Share, Exercisd     
Weighted Average Exercise Price Per Share, Forfeited $ 8.50  
Weighted Average Exercise Price Per Share, Outstanding at end of period $ 6.95 $ 6.95
Vested and expected to vest - end of period $ 6.82  
Weighted Average Remaining Contractual Term, Outstanding balance 3 years 4 days 2 years 10 months 6 days
Weighted Average Remaining Contractual Term, Granted 4 years 11 months 5 days  
Weighted Average Remaining Contractual Term, Forfeited 2 years 10 months 28 days  
Vested and expected to vest - end of period 2 years 6 months 26 days  
Aggregate Intrinsic Value, Outstanding at beginning of period $ 2.81  
Aggregate Intrinsic Value, Outstanding at end of period 2.92 2.81
Vested and expected to vest - end of period $ 2.75