Assets Held for Sale - Components (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	$ 1,366	$ 1,442
Discontinued Operations, Held-for-sale
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	1,366	1,442
Discontinued Operations, Held-for-sale | Parcels On East Ranch
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	$ 1,366	$ 1,442