EQUITY-BASED INCENTIVE AWARDS - Omnibus Plans and Stock Options (Details)	3 Months Ended
	Dec. 31, 2020 item $ / shares shares
EQUITY-BASED INCENTIVE AWARD
Number of incentive plans | item	2
Omnibus Plans
EQUITY-BASED INCENTIVE AWARD
Number of shares of the company's common stock permitted for issuance under the plan	135,000
Number of shares awarded pursuant to the plan	120,751
Number of additional shares that may be awarded under the plan	14,249
Stock Options
Number of Shares
Outstanding at the beginning of the period (in shares)	34,350
Exercised (in shares)	(7,300)
Forfeited/ Expired (in shares)	(500)
Outstanding at the end of the period (in shares)	26,550
Weighted Average Exercise Price
Outstanding at beginning of the period (in dollars per share) | $ / shares	$ 80.33
Exercised (in dollars per share) | $ / shares	59.19
Forfeited/ Expired (in dollars per share) | $ / shares	84.00
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 86.07