Note 5 - Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 30, 2024	Mar. 31, 2023
Net income	$ 71,435	$ 71,435	$ 96,007
Basic weighted-average number of common shares outstanding (in shares)	72,673,974		72,533,239
Dilutive effect of weighted-average outstanding common share equivalents RSUs (in shares)	297,183		366,423
Diluted weighted-average number of common shares outstanding (in shares)	72,971,157		72,899,662
Average restricted stock units with anti-dilutive effect (in shares)	0		777
Basic (in dollars per share)	$ 0.98		$ 1.32
Diluted (in dollars per share)	$ 0.98		$ 1.32