Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022	Jun. 01, 2020
Earnings Per Share:
Net income		$ 10,348	$ 20,999	$ 35,271	$ 66,041
Shares used in computing basic earnings per share		31,796	34,079	31,789	35,935
Effect of dilutive securities:
Convertible debt and stock-based awards		282	700	1,130	1,033
Shares used in computing diluted earnings per share		32,078	34,779	32,919	36,968
Earnings per share:
Basic (in dollars per share)		$ 0.33	$ 0.62	$ 1.11	$ 1.84
Diluted (in dollars per share)		$ 0.32	$ 0.60	$ 1.07	$ 1.79
Shares attributable to dilutive effect of conversion of debt securities		0	700	400	700
0.625% Convertible Senior Notes (2025 Notes)
Earnings per share:
Interest rate (as a percent)		0.625%		0.625%		0.625%
Repayment of convertible senior notes	$ 535,000
Number of shares of common stock issued in connection with redemption of convertible senior notes	900