XML 59 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Income per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Dec. 31, 2017
Earnings Per Share, Diluted [Line Items]                
Net income attributable to shareholders $ 169,915 $ 53,653 $ 134,064 $ 99,722 $ 114,737 $ 309,009 $ 214,459 $ 402,176
Weighted average shares outstanding - basic 87,802     88,876   87,878 89,079  
Net effect of various dilutive stock-based compensation awards 850     961   963 1,067  
Weighted average shares outstanding - diluted 88,652     89,837   88,841 90,146  
Net income per share:                
Basic $ 1.94     $ 1.12   $ 3.52 $ 2.41  
Diluted [1] $ 1.92     $ 1.11   $ 3.48 $ 2.38  
Stock Compensation Plan [Member]                
Net income per share:                
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 915     432   515 328  
[1] Stock-based compensation awards for the issuance of 915 and 515 shares for the second quarter and first six months of 2018 and 432 and 328 shares for the second quarter and first six months of 2017, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.