SHAREHOLDERS' EQUITY - Narrative (Details)					3 Months Ended		6 Months Ended		55 Months Ended
	Apr. 26, 2023 shares	Nov. 17, 2022 USD ($) $ / shares shares	Jul. 18, 2021	Feb. 04, 2020 USD ($) sales_agent	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Aug. 02, 2022 USD ($)	Aug. 01, 2022 USD ($)	Aug. 31, 2021 USD ($)	Jul. 28, 2021 USD ($)	May 26, 2021 USD ($)	Mar. 04, 2019 USD ($)
Subsidiary or Equity Method Investee [Line Items]
Repurchase authorized amount												$ 20,000,000	$ 20,000,000
Cancellation of treasury stock (in shares) | shares	2,339,512
Public Equity Offering
Subsidiary or Equity Method Investee [Line Items]
Number of shares sold (in shares) | shares		2,534,436
Par value, common stock (in usd per share) | $ / shares		$ 18.15
Gross proceeds received (in thousands)		$ 46,000,000
Net proceeds received		$ 44,100,000
Equity ATM Program
Subsidiary or Equity Method Investee [Line Items]
Number of shares sold (in shares) | shares					1,100,000	1,381,716	3,627,458	3,644,568	20,240,580
Gross proceeds received (in thousands)					$ 22,844,000	$ 26,913,000	$ 68,416,000	$ 73,666,000	$ 413,100,000
Net proceeds received					$ 22,501,000	$ 26,509,000	$ 67,390,000	$ 72,561,000	$ 406,500,000
Maximum consideration threshold				$ 100,000,000						$ 650,000,000	$ 250,000,000			$ 250,000,000	$ 50,000,000
Number of additional sales agents | sales_agent				2
Gross sales commission percentage														1.50%	2.00%
Weighted average price per share (in usd per share) | $ / shares					$ 20.77	$ 19.48	$ 18.86	$ 20.21	$ 20.41
Available under the Equity ATM Program					$ 236,900,000		$ 236,900,000		$ 236,900,000
2010 Plan | Restricted Stock
Subsidiary or Equity Method Investee [Line Items]
Right to grant period			10 years