Share Based Payments (Summary Of Unvested Share Awards Issued To Trustees) (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
Dec. 31, 2018	Jun. 30, 2019
Unvested Share Awards [Abstract]
Shares issued (in shares)		1,185,422
Vesting schedule (in hundredths)		25.00%
Shares vested (in shares)	236,258	300,841
Unearned Compensation	$ 3,027	$ 5,658
Board Fee Compensation [Member] \| Issued 12-31-2018 [Member]
Unvested Share Awards [Abstract]
Shares issued (in shares)	10,863	10,863
Share price on date of grant (in dollars per share)		$ 17.54
Vesting Period		12 months
Vesting schedule (in hundredths)		100.00%
Unearned Compensation	$ 191	$ 95
Multi-year LTIP Trustee [Member]
Unvested Share Awards [Abstract]
Shares vested (in shares)	6,335	6,335
Unearned Compensation	$ 298	$ 228
Multi-year LTIP Trustee [Member] \| Issued 12-31-2018 [Member]
Unvested Share Awards [Abstract]
Weighted Average Share Price (in dollars per share)		$ 17.54
Shares issued (in shares)		9,000
Vesting Period		3 years
Shares vested (in shares)	0	0
Unearned Compensation	$ 158	$ 132
Multi-year LTIP Trustee [Member] \| Issued 12-29-2017 [Member]
Unvested Share Awards [Abstract]
Weighted Average Share Price (in dollars per share)		$ 17.40
Shares issued (in shares)		9,000
Vesting Period		3 years
Shares vested (in shares)	3,000	3,000
Unearned Compensation	$ 104	$ 78
Multi-year LTIP Trustee [Member] \| Issued 12-30-2016 [Member]
Unvested Share Awards [Abstract]
Weighted Average Share Price (in dollars per share)		$ 21.50
Shares issued (in shares)		5,000
Vesting Period		3 years
Shares vested (in shares)	3,335	3,335
Unearned Compensation	$ 36	$ 18
Share-based Compensation Award, Tranche One [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-31-2018 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche One [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-29-2017 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche One [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-30-2016 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Two [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-31-2018 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Two [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-29-2017 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Two [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-30-2016 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Three [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-31-2018 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Three [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-29-2017 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%
Share-based Compensation Award, Tranche Three [Member] \| Multi-year LTIP Trustee [Member] \| Issued 12-30-2016 [Member]
Unvested Share Awards [Abstract]
Vesting schedule (in hundredths)		33.33%

Unrecognized cost of unvested share-based compensation awards.

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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.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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- Definition

The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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