Note 6 - Retirement and Other Benefit Plans - Pension Plan Assets (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Feb. 02, 2019
Plan assets		$ 368,217
Investments	$ 16,410	13,233
Total investments at fair value	428,186	381,450
Fair Value, Inputs, Level 1 [Member]
Plan assets		294,682
Investments	0	0
Total investments at fair value	335,002	294,682
Fair Value, Inputs, Level 2 [Member]
Plan assets		73,300
Investments	0	0
Total investments at fair value	75,897	73,300
Fair Value, Inputs, Level 3 [Member]
Plan assets		235
Investments	0	0
Total investments at fair value	877	235
Defined Benefit Plan, Cash and Cash Equivalents [Member]
Plan assets	31,588	17,312
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	31,588	17,312
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	87,455
Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	0	14,155
Mutual Fund [Member]
Plan assets	32,551	31,966
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	32,551	31,966
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	0
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	0	0
Defined Benefit Plan, Real Estate [Member]
Plan assets		232
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets		232
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets		0
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets		0
US Government Agencies Debt Securities [Member]
Plan assets	94,285
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	18,388
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	75,897
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	0
Exchange Traded Funds [Member]
Plan assets	71,505	65,464
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	71,505	65,464
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	0
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	0	0
Defined Benefit Plan, Equity Securities, Common Stock [Member]
Plan assets	177,743	169,721
Defined Benefit Plan, Equity Securities, Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	177,718	169,721
Defined Benefit Plan, Equity Securities, Common Stock [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	0
Defined Benefit Plan, Equity Securities, Common Stock [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	25	0
Preferred Securities [Member]
Plan assets	852	639
Preferred Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	0	404
Preferred Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	0
Preferred Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	852	235
S&P 500 Index Options [Member]
Plan assets	3,252	(4,572)
S&P 500 Index Options [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	3,252	(4,572)
S&P 500 Index Options [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	0	0
S&P 500 Index Options [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	0	0
Alternative Investment Fund [Member]
Plan assets	411,776
Investments	16,335	13,160
Alternative Investment Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Plan assets	335,002
Investments	0	0
Alternative Investment Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Plan assets	75,897
Investments	0	0
Alternative Investment Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Plan assets	877
Investments	0	0
Unallocated Insurance Contracts [Member]
Investments	75	73
Unallocated Insurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Investments	0	0
Unallocated Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Investments	0	0
Unallocated Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Investments	$ 0	$ 0