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STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Nov. 20, 2019
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	2,598,194	3,497,565
Stock repurchased during the period (in shares)		88,784	89,775
Stock repurchased during the period, value		$ 2.9	$ 3.0
Treasury Stock
Class of Stock [Line Items]
Average cost per share (in dollars per share)	$ 34.71	$ 34.53
Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				7,500,000

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