Long-term Incentive Plan Units Issued

No definition available.

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- Definition

The company offers to its trustees a premium equity issue offer instead of a cash retainer

+ References

No definition available.

+ Details

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- Definition

Represents shareholders return as percentage of award for achievement level under share based compensation program.

+ References

No definition available.

+ Details

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- Definition

Shareholders Return As Percentage Of Award For Achievement Level Three

+ References

No definition available.

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- Definition

Represents shareholders return as percentage of award for achievement level two.

+ References

No definition available.

+ Details

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Publisher FASB
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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

+ Details

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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).

+ References

+ Details

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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.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

+ Details

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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Share Based Payments (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
LTIP Unit Issuance (in shares)			0
Stock based compensation expense	$ 1,512	$ 1,514	$ 5,468	$ 5,793
Unearned Compensation	$ 1,147		$ 1,147		$ 1,550
Shares Issued (in shares)			693,854
Shares Vested (in shares)	477,898		477,898		360,918
Annual Long Term Equity Incentive Programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 938	952	$ 3,044	3,314
Unearned Compensation	1,147		$ 1,147		$ 1,550
2016 Multi-Year Long Term Equity Incentive Program (“2016 Multi-Year EIP”) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Terms of Share-based payment awards			On March 10, 2017, the Compensation Committee approved the 2017 Multi-Year Long Term Equity Incentive Program ("2017 Multi-Year EIP"). This program has a three-year performance period which commenced on January 1, 2017 and ends December 31, 2019. As of September 30, 2017, no shares or LTIP Units have been issued to the executive officers in settlement of 2017 Multi-Year EIP awards.
Multi-Year LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	309	343	$ 1,289	1,527
Unearned Compensation	$ 1,997		$ 1,997		1,568
Shareholders return as percentage of award for achievement level one (in hundredths)	37.50%		37.50%
Shareholders return as percentage of award for achievement level two (in hundredths)	37.50%		37.50%
Shareholders return as percentage of award for achievement level three (in hundredths)	25.00%		25.00%
Shares Issued (in shares)			61,057
Shares Vested (in shares)	30,524		30,524
Multi-year LTIP Trustee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 20	15	$ 58	45
Unearned Compensation	$ 109		$ 109		$ 167
Shares Vested (in shares)	2,505		2,505		2,505
Restricted Common Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 187	150	$ 473	407
Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned Compensation	$ 843		$ 843		$ 505
Shares Issued (in shares)			97,476
Shares Vested (in shares)	39,860		39,860		14,230
Board Fee Compensation [Member] \| Multi-year LTIP Trustee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 23	37	$ 71	74
Percentage premium on retainer equity option (in hundredths)	25.00%		25.00%
Company's Trustees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 322	319	$ 322	319
Shares Issued (in shares)			17,074
Share Price on date of grant (in dollars per share)			$ 18.86
Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	35	$ 17	$ 211	$ 107
Unearned Compensation	$ 137		$ 137		$ 79
Shares Issued (in shares)			22,350
Shares Vested (in shares)	14,975		14,975		3,750