XML 77 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
Information with Respect to Ordinary Shares that were Surrendered, Repurchased or Redeemed (Detail) - Ordinary Shares A - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased 45,233 28,965
Average Price Paid Per Share $ 40.07 $ 39.25
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program 0 0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs $ 0 $ 0
January 1 - 31, 2017    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased [1]   13,656
Average Price Paid Per Share [2]   $ 38.21
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
February 1 - 28, 2017    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased [1]   15,309
Average Price Paid Per Share [2]   $ 40.18
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program   0
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs   $ 0
January 1 -31, 2018    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased [1] 26,639  
Average Price Paid Per Share [2] $ 42.02  
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program 0  
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs $ 0  
March 1 -31, 2018    
Equity, Class of Treasury Stock [Line Items]    
Total Number of Shares Purchased [1] 18,594  
Average Price Paid Per Share [2] $ 37.27  
Total Number of Shares Purchased as Part of Publicly Announced Plan or Program 0  
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs $ 0  
[1] Surrendered by employees as payment of taxes withheld on the vesting of restricted stock.
[2] Based on settlement date.