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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share Reconciliation [Abstract]                      
Net income $ (353,172) $ 136,104 $ 131,822 $ 105,557 $ 174,378 $ 124,856 $ 128,217 $ 94,052 $ 20,311 $ 521,503 $ 469,053
Net income per basic common share $ (4.44) $ 1.71 $ 1.65 $ 1.32 $ 2.17 $ 1.55 $ 1.59 $ 1.16 $ 0.25 $ 6.46 $ 5.7
Effect of dilutive stock option, restricted stock, performance stock unit and restricted stock unit securities on earnings per share                   (0.05) (0.05)
Net income per diluted common share $ (4.44) $ 1.69 $ 1.63 $ 1.31 $ 2.15 $ 1.53 $ 1.57 $ 1.15 $ 0.25 $ 6.41 $ 5.65
Weighted-average number of basic common shares 79,454 79,712 79,979 80,073 80,366 80,677 80,804 81,275 79,793 80,786 82,336
Effect of dilutive stock option, restricted stock and restricted stock unit securities on shares outstanding                 811 631 751
Weighted-average number of diluted common shares and equivalents 79,454 80,521 80,756 80,769 80,954 81,388 81,455 81,974 80,604 81,417 83,087
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]                      
Antidilutive securities excluded from computation of earnings per share                 400 900 1,200