INVESTMENTS - SALE OF INTEREST IN LEASEHOLD LAND (Details)	12 Months Ended
	Sep. 30, 2021 USD ($) lot	Mar. 07, 2019 USD ($) day singleFamilyResidentialLot
KD Acquisition II, LP | Investments in land development partnerships
Investment Holdings [Line Items]
Collaborative agreement, percentage of distributions		15.00%
Collaborative agreement, percentage of cumulative net profits, priority payment		10.00%
Collaborative agreement, percentage of cumulative net profits, priority payment, maximum amount		$ 3,000,000
KD Acquisition II, LP | KD Kaupulehu, LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired		55.00%
KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Aggregate gross proceeds from sale of Increment I single family lots for calculating payments entitled to be received	$ 237,038,000
Number of single family lots sold | lot	8
Number of lots remaining to be sold | lot	9
Number of lots developed | lot	80
KD Kaupulehu LLLP Increment II Phase 2A | Investments in land development partnerships
Investment Holdings [Line Items]
Number of single family lots, rights to | singleFamilyResidentialLot		3
KD Kaupulehu LLLP Increment II Phase 2A, lots completed subsequent to Phase 2A | Investments in land development partnerships
Investment Holdings [Line Items]
Number of single family lots, rights to | singleFamilyResidentialLot		4
Collaborative agreement, commitment to construct improvements term | day		90
KD Development, LLC | Investments in land development partnerships
Investment Holdings [Line Items]
Collaborative agreement, fees, percentage of cumulative net profits		0.72%
Pool Of Various Individuals | Investments in land development partnerships
Investment Holdings [Line Items]
Collaborative agreement, fees, percentage of cumulative net profits		0.20%
Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 | KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Payments entitled to be received as percentage of gross proceeds from sale of single family lots	10.00%
Aggregate gross proceeds in excess of $300,000,000 | KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Payments entitled to be received as percentage of gross proceeds from sale of single family lots	14.00%
Minimum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 | KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Aggregate gross proceeds from sale of Increment I single family lots for calculating payments entitled to be received	$ 100,000,000
Minimum | Aggregate gross proceeds in excess of $300,000,000 | KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Aggregate gross proceeds from sale of Increment I single family lots for calculating payments entitled to be received	300,000,000
Maximum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 | KD Kaupulehu LLLP Increment I | Kaupulehu Developments
Investment Holdings [Line Items]
Aggregate gross proceeds from sale of Increment I single family lots for calculating payments entitled to be received	$ 300,000,000