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Fair Value Disclosures (Details) - USD ($)
$ in Thousands
Aug. 01, 2020
Feb. 01, 2020
Aug. 03, 2019
Fair value disclosures      
Subordinated debentures $ 200,000 $ 200,000 $ 200,000
Fair Value of Assets      
Fair value disclosures      
Long-term debt, including current portion, fair value 391,000    
Subordinated debentures 158,000    
Carrying value      
Fair value disclosures      
Long-term debt, including current portion 365,800    
Subordinated debentures $ 200,000