Note 13 - Retirement and Other Benefit Plans - Components of Net Periodic Benefit Income (Details) - USD ($) $ in Thousands	3 Months Ended
	May 02, 2020	May 04, 2019
Pension Plan [Member]
Service cost	$ 2,160	$ 1,854
Interest cost	3,154	3,725
Expected return on assets	(7,443)	(6,892)
Actuarial loss (gain)	1,083	928
Prior service income	(350)	(365)
Total net periodic benefit income	(1,396)	(750)
Other Postretirement Benefits Plan [Member]
Service cost	0	0
Interest cost	10	15
Expected return on assets	0	0
Actuarial loss (gain)	(39)	(30)
Prior service income	0	0
Total net periodic benefit income	$ (29)	$ (15)