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STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jun. 25, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 20, 2019
Class of Stock [Line Items]
Stock repurchased during period (in shares)		103,830	104,219
Stock repurchased during period, value		$ 3.2	$ 3.4
Treasury Stock, Common
Class of Stock [Line Items]
Stock repurchased and retired during the period (in shares)	114,558
Retirement of treasury stock	$ 5.0
Common Stock
Class of Stock [Line Items]
Stock repurchased and retired during the period (in shares)		3,669,597
Average cost per share (in dollars per share)		$ 33.04
Number of shares authorized to be repurchased (in shares)				7,500,000
Remaining number of shares authorized to be repurchased (in shares)		4,149,631

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