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Aggregate dividends declared during the period for each share of common stock outstanding.

+ 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 S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

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Aggregate dividends declared during the period for each share of preferred stock outstanding.

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Distributions (Details Textual) (USD $)	12 Months Ended			1 Months Ended
Distributions (Details Textual) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 21, 2015
Distributions (Textual)
Preferred stock, dividend declared per share, paid	$ 2.0625	$ 2.0625	$ 2.0625
Cumulative redeemable preferred stock, dividend rate, percentage	8.25%
Annual rate on dividend per share payable quarterly	$ 2.0625us-gaap_DividendsPayableAmountPerShare
Subsequent Event [Member]
Distributions (Textual)
Declaration Date				Jan. 21, 2015
Record Date				Feb. 17, 2015
Payment Date				Mar. 16, 2015
Dividends declared per share				$ 0.18
8.25% Series A Cumulative Redeemable Preferred Stock [Member]
Distributions (Textual)
Preferred stock, dividend declared per share, paid				$ 0.515625