SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 02, 2022	Feb. 28, 2022	Mar. 31, 2022	Dec. 31, 2020	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Stockholders' Equity Note [Abstract]
Number of common shares authorized to be repurchased (up to) (in shares)			4,000,000		4,000,000
Shares of common stock repurchased (in shares)			600,000		3,200,000	0
Aggregate cost of repurchased shares			$ 16,600		$ 77,000
Cash dividends paid (in dollars per share)		$ 0.25
Cash dividends declared (in dollars per share)	$ 0.25		$ 0.25	$ 0.25
Dividends payable			$ 26,697		$ 26,697		$ 27,332