Note 14 - Retirement and Other Benefit Plans - Components of Net Periodic Benefit Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Pension Plan [Member]
Service cost	$ 1,755	$ 2,097	$ 3,609	$ 4,479
Interest cost	3,680	3,550	7,405	7,091
Expected return on assets	(6,967)	(7,272)	(13,859)	(14,504)
Actuarial loss (gain)	1,024	1,048	1,952	2,061
Prior service income	(378)	(386)	(743)	(784)
Total net periodic benefit income	(886)	(963)	(1,636)	(1,657)
Other Postretirement Benefits Plan [Member]
Service cost	0	0	0	0
Interest cost	15	14	30	29
Expected return on assets	0	0	0	0
Actuarial loss (gain)	(24)	(32)	(54)	(62)
Prior service income	0	0	0	0
Total net periodic benefit income	$ (9)	$ (18)	$ (24)	$ (33)