Common Shares of Beneficial Interest, Potential Aggregate Gross Proceeds Remaining

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- Definition

Common Shares of Beneficial Interest, Potential Available Aggregate Gross Proceeds

+ References

No definition available.

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- Definition

Common Stock Issued, Deferred Shares

+ References

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- Definition

Number of Annual Installments

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- Definition

Number of long-term performance shares awarded but not yet valued.

+ References

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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Common Shares of Beneficial Interest (Narrative) (Details) (USD $)	0 Months Ended
	Mar. 19, 2015	Jan. 01, 2015	Mar. 31, 2015	Dec. 31, 2014	Feb. 20, 2013
Equity [Line Items]
Common shares, shares issued			112,963,432us-gaap_CommonStockSharesIssued	112,828,536us-gaap_CommonStockSharesIssued
2014 Plan [Member]
Equity [Line Items]
Common shares, shares issued		11,682
Additional deferred shares issued		4,183
2009 Plan [Member]
Equity [Line Items]
Common shares, shares issued		9,757
Deferred Shares Issued in Annual Installments			5
2013 Agreement [Member]
Equity [Line Items]
Common shares, shares issued			0
Common shares of beneficial interest, potential available offereing price with aggregate gross proceeds					$ 250,000,000
Common shares of beneficial interest, potential offering price remaining			230,057,000
Nonvested Share Awards with Service Conditions [Member] \| 2014 Plan [Member]
Equity [Line Items]
Deferred Shares Issued in Annual Installments	3
Issuance of nonvested shares with service conditions	62,742
January 26, 2012 Awards [Member] \| Nonvested Restricted Share Awards with Market or Performance Conditions [Member] \| 2009 Plan [Member]
Equity [Line Items]
Number of Shares Earned		108,779