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Employee Benefit Plans (Schedule of Stock Option Activity) (Details) - Stock Options
shares in Thousands
3 Months Ended
Apr. 01, 2018
$ / shares
shares
Number of shares  
Beginning balance (in shares) | shares 1,879
Granted (in shares) | shares 348
Exercised (in shares) | shares (73)
Cancelled (in shares) | shares 0
Expired (in shares) | shares (5)
Ending balance (in shares) | shares 2,149
Weighted Average Exercise Price Per Share  
Beginning balance (in dollars per share) | $ / shares $ 34.08
Granted (in dollars per share) | $ / shares 70.15
Exercised (in dollars per share) | $ / shares 25.56
Cancelled (in dollars per share) | $ / shares 0.00
Expired (in dollars per share) | $ / shares 20.07
Ending balance (in dollars per share) | $ / shares $ 40.25