XML 67 R39.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share-Based Compensation - Summary of Activity Related to Stock Options Granted under Company's Incentive Plan (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Total Shares outstanding, Beginning balance 4,229
Total Shares, Granted 25
Total Shares, Exercised (1,025)
Total Shares, Forfeited, canceled or expired (25)
Total Shares outstanding, Ending balance 3,204
Total Shares, Exercisable 1,699
Weighted Average Exercise Price per Share Outstanding, Beginning balance $ 14.57
Weighted Average Exercise Price per Share, Granted $ 24.97
Weighted Average Exercise Price per Share, Exercised $ 13.74
Weighted Average Exercise Price per Share, Forfeited, canceled or expired $ 16.17
Weighted Average Exercise Price per Share Outstanding, Ending balance $ 14.90
Weighted Average Exercise Price per Share, Exercisable $ 14.18
Weighted Average Remaining Contractual Term (Years), Outstanding 6 years 4 months 10 days
Weighted Average Remaining Contractual Term (Years), Exercisable 5 years 11 months 27 days
Aggregate Intrinsic Value, Outstanding $ 55,531
Aggregate Intrinsic Value, Exercisable $ 30,661
Employee Stock Option [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Total Shares, Available for issuance 2,235