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Dividends, textual (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) item $ / shares
Series B cumulative redeemable perpetual preferred shares
Class of Stock [Line Items]
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares	$ 0.5
Number Of Quarters Of Dividend Payments | item	4
Dividends paid preferred shares | $	$ 3,049
Series C cumulative redeemable perpetual preferred shares
Class of Stock [Line Items]
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares	$ 0.5
Number Of Quarters Of Dividend Payments | item	4
Dividends paid preferred shares | $	$ 4,600
Series D cumulative redeemable perpetual preferred shares
Class of Stock [Line Items]
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares	$ 0.5
Number Of Quarters Of Dividend Payments | item	4
Dividends paid preferred shares | $	$ 6,400

X

- Definition

Number of quarters during the current period on which the company declared and paid dividends.

+ References

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- Definition

Dividends paid quarterly for each share of preferred stock outstanding.

+ References

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- Definition

Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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