EQUITY-BASED INCENTIVE AWARDS - Omnibus Plans and Stock Options (Details)	12 Months Ended
	Sep. 30, 2022 USD ($) item $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares
Omnibus Plans
EQUITY-BASED INCENTIVE AWARD
Number of incentive plans | item	3
Number of shares of the company's common stock permitted for issuance under the plan	195,000
Number of shares awarded pursuant to the plan	111,420
Number of additional shares that may be awarded under the plan	83,580
Stock Options
Stock options issued and outstanding
Awards issued (in shares)	0	0
Expiration period	10 years
Vesting period	5 years
Number of Outstanding (in shares)	0	22,250
Number of Exercisable (in shares)	0
Number of Shares
Outstanding at the beginning of the period (in shares)	22,250
Granted (in shares)	0	0
Exercised (in shares)	(22,250)
Outstanding at the end of the period (in shares)	0	22,250
Weighted Average Exercise Price
Outstanding at beginning of the period (in dollars per share) | $ / shares	$ 86.76
Exercised (in dollars per share) | $ / shares	$ 86.76
Outstanding at the end of the period (in dollars per share) | $ / shares		$ 86.76
Aggregate intrinsic value and fair value of options outstanding
Compensation expense | $	$ 100,000	$ 100,000
Total unamortized compensation expense | $	0
Aggregate intrinsic value of options outstanding | $		1,100,000
Aggregate intrinsic value of options exercisable | $		900,000
Total intrinsic value of options exercised | $	2,700,000	900,000
Total fair value of options vested | $	$ 1,400,000	$ 700,000