XML 66 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Number and Weighted Average Exercise Price of Options Issued and Outstanding under all Stock Option Plans (Detail)
shares in Thousands
 9 Months Ended
Sep. 30, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Options outstanding, beginning of period 8,521
Granted 847
Canceled (220)
Exercised (2,009)
Options outstanding, end of period 7,139
Options exercisable, end of period 3,991
Options available for grant, end of period 4,000
Average Exercise Price  
Options outstanding, beginning of period | $ / shares $ 28.56
Granted | $ / shares 86.80
Canceled | $ / shares 36.49
Exercised | $ / shares 27.66
Options outstanding, end of period | $ / shares 35.48
Options exercisable, end of period | $ / shares $ 26.26