Equity	9 Months Ended
Jun. 30, 2016
Equity [Abstract]
Equity	Equity Common Share Dividend Distribution During the nine months ended June 30, 2016, the Trust did not declare a dividend on its shares. Stock Based Compensation The Trust's Amended and Restated 2016 Incentive Plan (the "Plan") permits the Trust to grant stock options, restricted stock, restricted stock units, performance shares awards and any one or more of the foregoing, up to a maximum of 600,000 shares. The Plan also allows for the grant of cash settled dividend equivalent rights in tandem with the grant of restricted stock units and certain performance based awards. Pursuant to the Plan, during the quarter ended June 30, 2016, the Trust issued restricted stock units (the "Units") to acquire up to 450,000 common shares (the "Pay for Performance Program"). Subject to satisfying a continued service requirement through the five years ending March 31, 2021 (the “Performance Period”), the Units entitle the recipients to acquire in the aggregate, (i) 200,000 shares (the “TSR Award”) based on achieving, during the Performance Period, certain levels in compounded annual growth rate (“CAGR”) in total shareholder return (“TSR”), and (ii) 200,000 shares based on achieving, during the Performance Period, certain levels in CAGR in adjusted funds from operations, as determined pursuant to the performance agreement. In addition, subject to satisfying the continued service requirement, up to 50,000 shares may be added to or subtracted from the TSR Award, based on attaining or failing to attain, during the Performance Period, of CAGR in TSR relative to the CAGR in TSR for the constituent REITs that comprise, with specified exceptions, the FTSE NAREIT Equity Apartment Index. Recipients of the Units are entitled to receive cash dividends with respect to the common shares underlying the Units as if the underlying shares were outstanding during the Performance Period, if, when, and to the extent, the related Units vests. Accordingly, for accounting purposes, the shares underlying the Units are excluded in the outstanding shares reflected on the balance sheet. For the awards which vest based on TSR, a third party appraiser prepared a Monte Carlo simulation pricing model to assist management in determining the fair value. For the awards which vest based on adjusted funds from operations, the fair value is based on the market value on the date of grant. Expense is not recognized on the Units which the Trust does not expect to vest as a result of service conditions or the Trust’s performance expectations. The total amount recorded as deferred compensation with respect to the Units is $2,117,000 and is being charged to General and administrative expense over the approximate five year vesting period. The deferred compensation expense to be recognized is net of certain forfeiture and performance assumptions. The Trust recorded $50,000 of compensation expense related to the amortization of unearned compensation with respect to the Units in the three and nine months ended June 30, 2016. In January 2016, the Trust granted 141,050 shares of restricted stock pursuant to the 2012 Incentive Plan (the "2012 Plan"). As of June 30, 2016, an aggregate of 667,025 shares of unvested restricted stock are outstanding pursuant to the 2012 Plan and the 2009 Incentive Plan ( collectively the "Prior Plans"). No additional awards may be granted under the Prior Plans. All restricted shares vest five years from the date of grant and under specified circumstances, including a change in control, may vest earlier. For accounting purposes, the restricted shares are not included in the outstanding shares shown on the consolidated balance sheets until they vest, but are included in the earnings per share computation. For the three months ended June 30, 2016 and 2015, the Trust recorded $221,000 and $232,000, respectively, of compensation expense related to the amortization of unearned compensation with respect to the restricted share awards. For the nine months ended June 30, 2016 and 2015, the Trust recorded $639,000 and $676,000, respectively of compensation expense related to the amortization of unearned compensation with respect to the restricted share awards. At June 30, 2016 and September 30, 2015, $2,311,000 and $2,184,000 has been deferred as unearned compensation and will be charged to expense over the remaining vesting periods of these restricted share awards. The weighted average vesting period of these restricted shares is 2.6 years. Share Buyback In February 2016, pursuant to a share repurchase program then in effect, the Trust purchased 252,000 shares of beneficial interest at the market price of $6.26 for a purchase price , including commission, of $1,584,000. On March 11, 2016, the Board of Trustees approved a new share repurchase program authorizing the Trust to repurchase up to $5,000,000 of shares of beneficial interest through September 30, 2017. During the quarter ended June 30, 2016, the Trust purchased 66,554 shares of beneficial interest at an average market price of $7.11 for a purchase price, including commissions, of $474,000. Per Share Data Basic earnings (loss) per share is determined by dividing net income (loss) applicable to common shareholders for the applicable period by the weighted average number of shares of beneficial interest outstanding during such period. The Units are excluded from the basic earnings per share calculation, as they are not participating securities. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue shares of beneficial interest were exercised or converted into shares of beneficial interest or resulted in the issuance of shares of beneficial interest that share in the earnings of the Trust. Diluted earnings (loss) per share is determined by dividing net income (loss) applicable to common shareholders for the applicable period by the weighted average number of shares of beneficial interest outstanding during such period. For the three and nine month periods ended June 30, 2016, none of the Units are included in the diluted weighted average as they did not meet the applicable performance metrics during such periods. Basic and diluted shares outstanding for the three months ended June 30, 2016 and 2015, were 13,932,515 and 14,101,056, respectively, and for the nine months ended June 30, 2016 and 2015 were 14,055,436 and 14,144,236, respectively.

Equity

Common Share Dividend Distribution

During the nine months ended June 30, 2016, the Trust did not declare a dividend on its shares.

Stock Based Compensation

The Trust's Amended and Restated 2016 Incentive Plan (the "Plan") permits the Trust to grant stock options, restricted stock, restricted stock units, performance shares awards and any one or more of the foregoing, up to a maximum of 600,000 shares. The Plan also allows for the grant of cash settled dividend equivalent rights in tandem with the grant of restricted stock units and certain performance based awards.

Pursuant to the Plan, during the quarter ended June 30, 2016, the Trust issued restricted stock units (the "Units") to acquire up to 450,000 common shares (the "Pay for Performance Program"). Subject to satisfying a continued service requirement through the five years ending March 31, 2021 (the “Performance Period”), the Units entitle the recipients to acquire in the aggregate, (i) 200,000 shares (the “TSR Award”) based on achieving, during the Performance Period, certain levels in compounded annual growth rate (“CAGR”) in total shareholder return (“TSR”), and (ii) 200,000 shares based on achieving, during the Performance Period, certain levels in CAGR in adjusted funds from operations, as determined pursuant to the performance agreement. In addition, subject to satisfying the continued service requirement, up to 50,000 shares may be added to or subtracted from the TSR Award, based on attaining or failing to attain, during the Performance Period, of CAGR in TSR relative to the CAGR in TSR for the constituent REITs that comprise, with specified exceptions, the FTSE NAREIT Equity Apartment Index. Recipients of the Units are entitled to receive cash dividends with respect to the common shares underlying the Units as if the underlying shares were outstanding during the Performance Period, if, when, and to the extent, the related Units vests. Accordingly, for accounting purposes, the shares underlying the Units are excluded in the outstanding shares reflected on the balance sheet.

For the awards which vest based on TSR, a third party appraiser prepared a Monte Carlo simulation pricing model to assist management in determining the fair value. For the awards which vest based on adjusted funds from operations, the fair value is based on the market value on the date of grant. Expense is not recognized on the Units which the Trust does not expect to vest as a result of service conditions or the Trust’s performance expectations. The total amount recorded as deferred compensation with respect to the Units is $2,117,000 and is being charged to General and administrative expense over the approximate five year vesting period. The deferred compensation expense to be recognized is net of certain forfeiture and performance assumptions. The Trust recorded $50,000 of compensation expense related to the amortization of unearned compensation with respect to the Units in the three and nine months ended June 30, 2016.

In January 2016, the Trust granted 141,050 shares of restricted stock pursuant to the 2012 Incentive Plan (the "2012 Plan"). As of June 30, 2016, an aggregate of 667,025 shares of unvested restricted stock are outstanding pursuant to the 2012 Plan and the 2009 Incentive Plan ( collectively the "Prior Plans"). No additional awards may be granted under the Prior Plans. All restricted shares vest five years from the date of grant and under specified circumstances, including a change in control, may vest earlier. For accounting purposes, the restricted shares are not included in the outstanding shares shown on the consolidated balance sheets until they vest, but are included in the earnings per share computation. For the three months ended June 30, 2016 and 2015, the Trust recorded $221,000 and $232,000, respectively, of compensation expense related to the amortization of unearned compensation with respect to the restricted share awards. For the nine months ended June 30, 2016 and 2015, the Trust recorded $639,000 and $676,000, respectively of compensation expense related to the amortization of unearned compensation with respect to the restricted share awards. At June 30, 2016 and September 30, 2015, $2,311,000 and $2,184,000 has been deferred as unearned compensation and will be charged to expense over the remaining vesting periods of these restricted share awards. The weighted average vesting period of these restricted shares is 2.6 years.

Share Buyback

In February 2016, pursuant to a share repurchase program then in effect, the Trust purchased 252,000 shares of beneficial interest at the market price of $6.26 for a purchase price , including commission, of $1,584,000.

On March 11, 2016, the Board of Trustees approved a new share repurchase program authorizing the Trust to repurchase up to $5,000,000 of shares of beneficial interest through September 30, 2017. During the quarter ended June 30, 2016, the Trust purchased 66,554 shares of beneficial interest at an average market price of $7.11 for a purchase price, including commissions, of $474,000.

Per Share Data

Basic earnings (loss) per share is determined by dividing net income (loss) applicable to common shareholders for the applicable period by the weighted average number of shares of beneficial interest outstanding during such period. The Units are excluded from the basic earnings per share calculation, as they are not participating securities. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue shares of beneficial interest were exercised or converted into shares of beneficial interest or resulted in the issuance of shares of beneficial interest that share in the earnings of the Trust. Diluted earnings (loss) per share is determined by dividing net income (loss) applicable to common shareholders for the applicable period by the weighted average number of shares of beneficial interest outstanding during such period. For the three and nine month periods ended June 30, 2016, none of the Units are included in the diluted weighted average as they did not meet the applicable performance metrics during such periods.

Basic and diluted shares outstanding for the three months ended June 30, 2016 and 2015, were 13,932,515 and 14,101,056, respectively, and for the nine months ended June 30, 2016 and 2015 were 14,055,436 and 14,144,236, respectively.