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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 25, 2019
Sep. 30, 2019
Sep. 30, 2018
Nov. 20, 2019
Mar. 26, 2019
Class of Stock [Line Items]          
Stock repurchased during period, shares   104,219 20,947    
Stock repurchased during period, value   $ 3.4 $ 1.7    
Treasury Stock, Common          
Class of Stock [Line Items]          
Stock repurchased and retired during period $ 5.0        
Stock repurchased and retired during the period, shares 114,558        
Common Stock          
Class of Stock [Line Items]          
Stock repurchased and retired during period   $ 46.5      
Stock repurchased and retired during the period, shares   1,680,772      
Number of shares authorized to be repurchased         2,000,000
Outstanding shares authorized to be repurchased, percent         5.00%
Average cost per share   $ 27.67      
Remaining number of shares authorized to be repurchased   319,228      
Subsequent Event | Common Stock          
Class of Stock [Line Items]          
Number of shares authorized to be repurchased       7,500,000