Number of trading days preceding the reporting date for which average of closing price of common shares is taken.

No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exchange Ratio

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No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percentage of Target Value to be Paid Out

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No definition available.

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- Definition

Trustee Fees, Paid In Shares, Percentage

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No definition available.

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- Definition

Unrecognized compensation cost related to long term incentive plan units.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Per share or unit weighted-average intrinsic value of award granted under share-based payment arrangement. Excludes share and unit options.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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- Definition

Fees charged annually for the professional services of a trustee, usually quoted as a percentage of the funds being managed. The fee for appointing an offshore Trustee is included in the trust price.

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Equity Incentive Plan - Additional Information (Details)				1 Months Ended			12 Months Ended
	Jan. 18, 2022 shares	Mar. 01, 2021 $ / shares shares	May 17, 2013 shares	Jan. 31, 2021 shares	Jan. 31, 2020 shares	Jan. 31, 2019 shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares
Independent Trustees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Trustee fees \| $							$ 100,000	$ 100,000	$ 100,000
Common shares issued as compensation for services performed (in shares)				40,203	24,516	27,870
Independent Trustees \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued as compensation for services performed (in shares)	34,672
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Trustee fees paid in shares (up to 100%) (at least 50%) (in percentage)							58.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Trustee fees paid in shares (up to 100%) (at least 50%) (in percentage)							100.00%
Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)			3,000,000
Equity Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for share awards under equity			3 years
Equity Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for share awards under equity			5 years
2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares available for issuance (in shares)							579,825
Number of trading days preceding the reporting date for which average of closing price of common shares is taken							10 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs \| $							$ 99,700	28,500
Weighted - average period for recognition of unrecognized compensation costs							2 years 7 months 6 days
Compensation expense recognized \| $							$ 43,500	$ 30,000	$ 62,700
Shares granted (in shares)							10,000	0	0
Long Term Incentive Plan Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted - average period for recognition of unrecognized compensation costs							1 year 9 months 18 days
Compensation expense recognized \| $							$ 4,300,000	$ 4,400,000	$ 4,200,000
Exchange ratio							1
Shares granted (in shares)							330,945	325,507	221,853
Total unrecognized compensation cost related to LTIP Units \| $							$ 5,400,000	$ 4,900,000
2021 Time-Based LTIP Unit Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		132,381
2021 Performance-Based LTIP Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		198,564
Grants in period, intrinsic value, amount (in dollars per share) \| $ / shares		$ 15.91
2021 Performance-Based LTIP Unit Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target value to be paid out							50.00%
2021 Performance-Based LTIP Unit Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target value to be paid out							150.00%