Basis of Preparation	9 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Preparation	Basis of Preparation The accompanying interim unaudited consolidated financial statements as of June 30, 2017, and for the three and nine months ended June 30, 2017 and 2016, reflect all normal recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the results for such interim periods. The results of operations for the three and nine months ended June 30, 2017 and 2016, are not necessarily indicative of the results for the full year. The consolidated balance sheet as of September 30, 2016, has been derived from the audited financial statements at that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States ("GAAP") for complete financial statements. The consolidated financial statements include the accounts and operations of the Company, its wholly owned subsidiaries, and its majority owned or controlled real estate entities and its interests in variable interest entities ("VIEs") in which the Company is determined to be the primary beneficiary. Material inter-company balances and transactions have been eliminated. The Company’s consolidated joint ventures that own multi‑family properties were determined to be VIEs because the voting rights of some equity investors in the applicable joint venture entity are not proportional to their obligations to absorb the expected losses of the entity and their right to receive the expected residual returns. In addition, substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately fewer voting rights. It was determined that the Company is the primary beneficiary of these joint ventures because it has a controlling interest in that it has the power to direct the activities of the VIE that most significantly impact the entity's economic performance and it has the obligation to absorb losses of the entity and the right to receive benefits that could potentially be significant to the VIE. The joint ventures that own properties in Dallas, TX and St. Louis, MO were determined not to be a VIEs but are consolidated because the Company has substantive participating rights in such entities. With respect to its unconsolidated joint ventures, as (i) the Company is primarily the managing member but does not exercise substantial operating control over these entities or the Company is not the managing member and (ii) such entities are not VIEs, the Company has determined that such joint ventures should be accounted for under the equity method of accounting for financial statement purposes. The distributions to each joint venture partner are determined pursuant to the applicable operating agreement and may not be pro-rata to the percentage equity interest each partner has in the applicable venture. For the three and nine months ended June 30, 2016, the Company reclassified approximately $1,043,000 and $3,126,000 of tenant utility reimbursements from real estate operating expenses to rental and other revenues from real estate properties to conform with the current period presentation. This reclassification increased total revenues and expenses by $1,043,000 and $3,126,000, respectively, and had no effect on the Company's financial position, results of operations or cash flows. The preparation of the financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements. Actual results could differ from those estimates.

Basis of Preparation

The accompanying interim unaudited consolidated financial statements as of June 30, 2017, and for the three and nine months ended June 30, 2017 and 2016, reflect all normal recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the results for such interim periods. The results of operations for the three and nine months ended June 30, 2017 and 2016, are not necessarily indicative of the results for the full year. The consolidated balance sheet as of September 30, 2016, has been derived from the audited financial statements at that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States ("GAAP") for complete financial statements.

The consolidated financial statements include the accounts and operations of the Company, its wholly owned subsidiaries, and its majority owned or controlled real estate entities and its interests in variable interest entities ("VIEs") in which the Company is determined to be the primary beneficiary. Material inter-company balances and transactions have been eliminated.

The Company’s consolidated joint ventures that own multi‑family properties were determined to be VIEs because the voting rights of some equity investors in the applicable joint venture entity are not proportional to their obligations to absorb the expected losses of the entity and their right to receive the expected residual returns. In addition, substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately fewer voting rights. It was determined that the Company is the primary beneficiary of these joint ventures because it has a controlling interest in that it has the power to direct the activities of the VIE that most significantly impact the entity's economic performance and it has the obligation to absorb losses of the entity and the right to receive benefits that could potentially be significant to the VIE.

The joint ventures that own properties in Dallas, TX and St. Louis, MO were determined not to be a VIEs but are consolidated because the Company has substantive participating rights in such entities.

With respect to its unconsolidated joint ventures, as (i) the Company is primarily the managing member but does not exercise substantial operating control over these entities or the Company is not the managing member and (ii) such entities are not VIEs, the Company has determined that such joint ventures should be accounted for under the equity method of accounting for financial statement purposes.

The distributions to each joint venture partner are determined pursuant to the applicable operating agreement and may not be pro-rata to the percentage equity interest each partner has in the applicable venture.

For the three and nine months ended June 30, 2016, the Company reclassified approximately $1,043,000 and $3,126,000 of tenant utility reimbursements from real estate operating expenses to rental and other revenues from real estate properties to conform with the current period presentation. This reclassification increased total revenues and expenses by $1,043,000 and $3,126,000, respectively, and had no effect on the Company's financial position, results of operations or cash flows.

The preparation of the financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements. Actual results could differ from those estimates.