Note 10 - Retirement Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 01, 2023	Jul. 02, 2022
Service cost including administration	$ 1,736	$ 2,435
Interest cost	2,818	2,374
Expected return on plan assets	(4,174)	(4,025)
Amortization of prior service cost	19	23
Amortization of net loss	0	102
Net periodic benefit cost	$ 399	$ 909