Earnings Per Share - Reconciliation of Basic and Diluted EPS Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Earnings Per Share [Abstract]
Net income	$ 36,277	$ 32,798	$ 23,653
Weighted average shares outstanding for basic EPS	80,565	78,608	75,899
Effect of dilutive securities:
Stock options	1,737	3,019	3,129
Restricted Stock	183	56	13
2025 Notes	308	0	0
Weighted average shares outstanding for diluted EPS	82,793	81,683	79,041
Basic EPS (in usd per share)	$ 0.45	$ 0.42	$ 0.31
Diluted EPS (in usd per share)	$ 0.44	$ 0.40	$ 0.30
Options, RSUs, and 2025 Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options, RSUs outstanding, and 2025 Notes excluded from EPS	13,325	294	0