Annual report pursuant to Section 13 and 15(d)

Restricted Stock Unit Outstanding (Detail)

v2.4.0.8
Restricted Stock Unit Outstanding (Detail) (Restricted Stock Units (RSUs))
 12 Months Ended
Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Awards expected to vest by period 1,331,753
2014 | Restricted Stock Units subject to service requirements
  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Awards expected to vest by period 359,785
2014 | Restricted Stock Units subject to service and other requirements
  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Awards expected to vest by period 67,877 [1]
2015 | Restricted Stock Units subject to service requirements
  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Awards expected to vest by period 719,971
2015 | Restricted Stock Units subject to service and other requirements
  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Awards expected to vest by period 184,120 [1]
[1] In addition to service requirements, these RSUs are also subject to TSR performance requirements not yet measureable, with awards ranging from 0% to 200% of amounts granted.