Share Capital, textual (Details) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Subsidiary, Sale of Stock [Line Items]
Ordinary shares authorized (in shares)	200,000,000	200,000,000
Ordinary shares par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	103,005,748	101,526,708
Common stock, shares outstanding (in shares)	103,005,748	101,526,708
Preference shares authorized (in shares)	20,000,000	20,000,000
Preference shares par value (in USD per share)	$ 0.01	$ 0.01
Series B Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	0	379,514
Series C Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	2,300,000	2,300,000
Series D Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	3,200,000	3,200,000
Series A Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preference shares authorized (in shares)	1,000,000

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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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.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ 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 FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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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.

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No definition available.

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