Earnings Per Share - Net Income and Weighted Average Shares for Basic and Diluted EPS (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 03, 2021	Oct. 04, 2020	Jul. 05, 2020	Apr. 05, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Earnings Per Share, Two Class Method [Line Items]
Net income (loss)	$ 19,616	$ 5,913	$ 4,709	$ (102,167)	$ 16,432	$ 26,210	$ 29,499	$ 7,059	$ (71,929)	$ 79,200	$ 50,253
Weighted Average Shares Outstanding (in shares)									58,110	58,475	58,995
Participating Securities (in shares)									437	468	549
Shares for Basic Earnings Per Share (in shares)									58,547	58,943	59,544
Dilutive Effect of Stock Options (in shares)									0	5	22
Shares for Diluted Earnings Per Share (in shares)									58,547	58,948	59,566
Participating Securities
Earnings Per Share, Two Class Method [Line Items]
Net income (loss)									$ 0	$ 600	$ 500