Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_RealEstateHeldforsale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Real Estate Property Held For Sale - Narrative (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations $ in Thousands	Jun. 30, 2017 USD ($) property	Sep. 30, 2016 USD ($)
Humble and Pasadena, TX
Real Estate [Line Items]
Number of properties, under contract for sale \| property	3
Real estate held for sale	$ 21,515
Atlanta, GA
Real Estate [Line Items]
Real estate held for sale		$ 27,076
Panama City, FL
Real Estate [Line Items]
Real estate held for sale		$ 6,920