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STOCK-BASED COMPENSATION - Performance Share Awards – Peer Group Market Condition Vesting (Details) - Performance Shares - Peer Group Market Condition Vesting - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jan. 24, 2018
Feb. 03, 2017
Jun. 30, 2018
Stock-based compensation      
Performance period 3 years   3 years
Shares      
Outstanding (in shares)     12,635
Granted (in shares) 15,445 12,635 15,445
Outstanding (in shares)     28,080
Weighted Average Fair Value      
Outstanding (in dollars per share)     $ 55.66
Granted (in dollars per share     74.99
Outstanding (in dollars per share)     $ 66.29
Compensation cost      
Unrecognized compensation cost     $ 1.3
Weighted average period of recognition of unrecognized compensation cost     2 years 2 months 12 days
Minimum      
Stock-based compensation      
Vesting percentage 0.00% 0.00%  
Maximum      
Stock-based compensation      
Vesting percentage 150.00% 150.00%