INVESTMENTS - PERCENTAGE OF SALES PAYMENTS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017 USD ($) a	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($) a increment	Mar. 31, 2016 USD ($)
Investment Holdings [Line Items]
Revenues - sale of interest in leasehold land	$ 0	$ 330	$ 1,678	$ 480
Kaupulehu Developments
Investment Holdings [Line Items]
Area of land (in acres) | a	870		870
Number of development increments | increment			2
Revenues - sale of interest in leasehold land	$ 0	330	$ 1,678	480
Fees - included in general and administrative expenses	0	(46)	(260)	(67)
Proceeds from sale of interest in leasehold land, net of fees paid	$ 0	$ 284	$ 1,418	$ 413
Land Interest
Investment Holdings [Line Items]
Area of land (in acres) | a	1,000		1,000