Variable Interest Entities (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Sep. 30, 2017
Variable Interest Entity [Line Items]
Real estate properties, net		$ 931,996	$ 902,281
Cash and cash equivalents		13,687	12,383
Deposits and escrows		23,630	27,839
Other assets		8,933	9,359
Real estate property held for sale		0	8,969
Total Assets	[1]	1,012,785	993,897
Mortgages payable, net of deferred costs of $6,220 and $6,345		712,061	697,826
Accounts payable and accrued liabilities		20,354	22,348
Total Liabilities	[1]	769,438	757,192
Real estate properties, net of accumulated depreciation		72,938	64,290
Deferred mortgage costs		(6,597)	(6,727)
Variable interest entity
Variable Interest Entity [Line Items]
Real estate properties, net		738,940	707,546
Cash and cash equivalents		8,282	8,626
Deposits and escrows		14,013	13,873
Other assets		8,139	8,148
Real estate property held for sale		0	8,969
Total Assets		769,374	747,162
Mortgages payable, net of deferred costs of $6,220 and $6,345		573,078	558,568
Accounts payable and accrued liabilities		12,852	14,419
Total Liabilities		585,930	572,987
Real estate properties, net of accumulated depreciation		52,873	52,873
Mortgages
Variable Interest Entity [Line Items]
Deferred mortgage costs		(6,220)	(6,345)
Mortgages | Variable interest entity
Variable Interest Entity [Line Items]
Deferred mortgage costs		$ (5,088)	$ (5,170)

[1] The Company's consolidated balance sheets include the assets and liabilities of consolidated variable interest entities (VIEs). See note 6. The consolidated balance sheets include the following amounts related to the Company's VIEs as of December 31, 2017 and September 30, 2017, respectively: $738,940 and $707,546 of real estate properties, $8,282 and $8,626 of cash and cash equivalents, $14,013 and $13,873 of deposits and escrows, $8,139 and $8,148 of other assets, $0 and $8,969 of real estate properties held for sale, $573,078 and $558,568 of mortgages payable and $12,852 and $14,419 of accounts payable and accrued liabilities.