Note 10 - Retirement Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 27, 2025	Dec. 28, 2024
Service cost including administrative expenses	$ 866	$ 1,173	$ 3,511	$ 4,354
Interest cost	2,504	3,092	8,329	8,975
Expected return on plan assets	(5,307)	(5,034)	(14,944)	(13,879)
Amortization of net loss	0	411	0	563
Amortization of prior service cost	0	2	0	7
Amortization of net loss	$ (1,937)	$ (356)	$ (3,104)	$ 20