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EMPLOYEE BENEFITS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 02, 2019
Feb. 03, 2018
Jan. 28, 2017
401(K) Profit Sharing Plan [Member]      
Schedule Of Deferred Compensation Plans [Line Items]      
Description of deferred compensation plan The Company has a 401(k) profit sharing plan covering all eligible employees who elect to participate. Contributions to the plan are based upon the amount of the employees’ deferrals and the employer’s discretionary matching formula. The Company may contribute to the plan at its discretion.    
Plan expense for the period $ 1,624 $ 1,743 $ 1,473
Deferred Compensation Plan for Executives [Member]      
Schedule Of Deferred Compensation Plans [Line Items]      
Description of deferred compensation plan The Buckle, Inc. Deferred Compensation Plan covers the Company’s executive officers. The plan is funded by participant contributions and a specified annual Company matching contribution not to exceed 6% of the participant’s compensation.    
Annual maximum percentage limitation based on participant's contribution 6.00%    
Employer contributions during the period $ 176 $ 183 $ 193