XML 80 R69.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fully Vested Stock Options and Stock Options Expected to Vest (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Number of Shares    
Outstanding 2,958 3,169
Exercisable 2,593  
Weighted Average Exercise Price    
Outstanding $ 32.70 $ 32.49
Exercisable $ 33.01  
Weighted Average Remaining Contractual Term (In years)    
Outstanding 5 years 3 months 14 days  
Exercisable 4 years 10 months 24 days  
Aggregate Intrinsic Value    
Outstanding $ 33,534  
Exercisable $ 28,662