COMMON STOCK EQUITY - NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	9 Months Ended
	May 26, 2021	Mar. 03, 2021	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			6,545,454
Proceeds from issuance of common stock - public equity offering			$ 212,900	$ 0	$ 212,900
Forward sale agreement payout				$ 2,823	$ 0
Directly Issued Common Stock
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			5,333,334
Forward Sales Agreements
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)			1,212,120
Conversion price per share (usd per share)			$ 40.0125
Forward sale agreement payout	$ 2,400	$ 388
Forward sales agreement, settlement (in shares)	484,848	727,272