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Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2016
Sep. 30, 2015
Sep. 28, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Net income $ 9,726 $ 8,950 $ 8,128 $ 27,217
Weighted average shares outstanding - basic (in shares) 74,851 82,923 76,214 83,952
Effect of dilutive share-based compensation awards 1,940 2,133 1,838 2,115
Weighted average shares outstanding - diluted (in shares) 76,791 85,056 78,052 86,067
Basic net income per share $ 0.13 $ 0.11 $ 0.11 $ 0.32
Diluted net income per share $ 0.13 $ 0.11 $ 0.10 $ 0.32
Antidilutive share-based compensation awards (in shares) 0 0 0 0