v3.10.0.1
Earnings Per Share (Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Net income attributable to FOX stockholders $ 18,369 $ 13,726 $ 39,593 $ 24,254
Weighted average shares used to compute basic earnings per share (in shares) 37,722 37,330 37,674 37,232
Dilutive effect of employee stock plans (in shares) 1,134 1,395 1,172 1,411
Weighted average shares used to compute diluted earnings per share (in shares) 38,856 38,725 38,846 38,643
Basic (in dollars per share) $ 0.49 $ 0.37 $ 1.05 $ 0.65
Diluted (in dollars per share) $ 0.47 $ 0.35 $ 1.02 $ 0.63