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Share Repurchases - Additional information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2016
Apr. 29, 2016
Apr. 14, 2015
Nov. 30, 2010
Equity Class Of Treasury Stock [Line Items]        
Purchase of treasury stock (in shares) 3,690      
Purchase of treasury stock $ 249,481      
Purchase of treasury stock, average price per share $ 67.61      
Share repurchase program, authorized amount     $ 725,944 $ 274,056
Subsequent Event        
Equity Class Of Treasury Stock [Line Items]        
Share repurchase program, outstanding authorizations available for share repurchase   $ 259,252