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STOCK-BASED COMPENSATION - Performance Share Awards – Peer Group Market Condition Vesting (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Jan. 23, 2019
Jan. 24, 2018
Aug. 04, 2017
Feb. 03, 2017
Sep. 30, 2019
Peer Group Market Condition Vesting | Equity Award Agreements          
Award agreements          
Period after change of control for equity award to fully vest upon termination of employment without cause or resignation     24 months    
Performance Shares          
Stock-based compensation          
Performance period 3 years        
Performance Shares | Peer Group Market Condition Vesting          
Stock-based compensation          
Performance period   3 years   3 years  
Shares          
Outstanding (in shares)         28,080
Granted (in shares) 21,195 15,445   12,635 21,195
Outstanding (in shares)         49,275
Weighted Average Fair Value          
Outstanding (in dollars per share)         $ 66.29
Granted (in dollars per share         64.66
Outstanding (in dollars per share)         $ 65.59
Compensation cost          
Unrecognized compensation cost         $ 1.6
Weighted average period of recognition of unrecognized compensation cost         1 year 10 months 24 days
Performance Shares | Minimum | Peer Group Market Condition Vesting          
Stock-based compensation          
Vesting percentage 0.00% 0.00%   0.00%  
Performance Shares | Maximum | Peer Group Market Condition Vesting          
Stock-based compensation          
Vesting percentage 150.00% 150.00%   150.00%