Annual report pursuant to Section 13 and 15(d)

Restricted Stock Unit Outstanding (Parenthetical) (Detail)

v2.4.0.8
Restricted Stock Unit Outstanding (Parenthetical) (Detail) (Restricted Stock Units (RSUs), Restricted Stock Units subject to service and other requirements)
12 Months Ended
Dec. 31, 2013
Minimum | 2014
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Restricted Stock Units adjustments, percentage 0.00%
Minimum | 2015
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Restricted Stock Units adjustments, percentage 0.00%
Maximum | 2014
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Restricted Stock Units adjustments, percentage 200.00%
Maximum | 2015
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Restricted Stock Units adjustments, percentage 200.00%