Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Numerator:
Net income (loss)	$ 32,665	$ 53,546	$ 42,326	$ 36,029	$ (10,819)	$ 42,808	$ 48,638	$ 38,891	$ 164,565	$ 119,519	$ 104,488
Weighted average shares outstanding
Basic (in shares)									24,870	22,687	22,559
Effect of dilutive securities (in shares)									365	244	168
Diluted (in shares)									25,235	22,931	22,727
Earnings Per Share:
Basic earnings per share (in dollars per share)									$ 6.62	$ 5.27	$ 4.63
Diluted earnings per share (in dollars per share)									$ 6.52	$ 5.21	$ 4.60