Represents the number of monthly dividends paid during the period.

No definition available.

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- Definition

Aggregate dividends paid 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

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

+ 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

+ Details

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- Definition

Cash outflow in the form of ordinary dividends to common shareholders, preferred shareholders and noncontrolling interests, generally out of earnings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: 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=31042434&loc=d3e3291-108585

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ 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 210.5-02.28)

-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 29

-Article 5

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Distributions Paid and Payable (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended						3 Months Ended
	Mar. 31, 2015	Feb. 28, 2015	Jan. 31, 2015	Mar. 31, 2014	Feb. 28, 2014	Jan. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Oct. 31, 2014
Issuance of common stock
Preferred stock, shares issued	16,350,000us-gaap_PreferredStockSharesIssued						16,350,000us-gaap_PreferredStockSharesIssued		16,350,000us-gaap_PreferredStockSharesIssued
Common stock
Issuance of common stock
Dividends paid per common share (in dollars per share)	$ 0.1890000	$ 0.1890000	$ 0.1834167	$ 0.1821667	$ 0.1821667	$ 0.1821667	$ 0.5614167	$ 0.5465001
Monthly distributions payable (in dollars per share)	$ 0.1895000						$ 0.1895000
Class E Cumulative Redeemable Preferred Stock
Issuance of common stock
Monthly distributions payable (in dollars per share)										$ 0.140625
Period for which dividends are paid								3
Dividends paid per preferred share (in dollars per share)								$ 0.421875
Preferred stock dividends paid								$ 3.7
Class F Cumulative Redeemable Preferred Stock
Issuance of common stock
Monthly distributions payable (in dollars per share)	$ 0.138021			$ 0.138021			$ 0.138021	$ 0.138021
Period for which dividends are paid							3	3
Dividends paid per preferred share (in dollars per share)							$ 0.414063	$ 0.414063
Preferred stock dividends paid							$ 6.8	$ 6.8