Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2019	Mar. 28, 2018
Earnings Per Share [Abstract]
Net income	$ 15,490	$ 9,759
Weighted average shares outstanding - basic (in shares)	61,651	64,432
Effect of dilutive share-based compensation awards	2,032	2,514
Weighted average shares outstanding - diluted (in shares)	63,683	66,946
Basic net income per share	$ 0.25	$ 0.15
Diluted net income per share	$ 0.24	$ 0.15
Antidilutive share-based compensation awards (in shares)	630	471