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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
Distributions - common stock, Cash per share (in dollars per share)	$ 0.39us-gaap_CommonStockDividendsPerShareCashPaid	$ 0.37us-gaap_CommonStockDividendsPerShareCashPaid	$ 1.50us-gaap_CommonStockDividendsPerShareCashPaid

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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

+ Details

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- Details

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