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. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Numerator:
Net income as reported	$ 22,654	$ 35,647	$ 43,792	$ 36,989	$ 32,665	$ 53,546	$ 42,326	$ 36,029	$ 139,082	$ 164,565	$ 119,519
Weighted average shares outstanding
Basic (in shares)									24,576	24,870	22,687
Effect of dilutive securities (in shares)									242	365	244
Diluted (in shares)									24,818	25,235	22,931
Earnings Per Share:
Basic earnings per share (in dollars per share)									$ 5.66	$ 6.62	$ 5.27
Diluted earnings per share (in dollars per share)									$ 5.60	$ 6.52	$ 5.21