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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Aug. 01, 2020
Apr. 17, 2020
Feb. 01, 2020
Aug. 03, 2019
Fair Value Measurements        
Convertible Senior Notes, carrying value $ 404,573   $ 0 $ 0
Par value 575,000 $ 575,000    
Level 1        
Fair Value Measurements        
Deferred compensation plan assets held in trust 107,200   $ 99,700  
Level 2        
Fair Value Measurements        
Convertible Senior Notes, fair value $ 866,000