CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	0 Months Ended	12 Months Ended
Mar. 06, 2015	Dec. 09, 2014	Sep. 12, 2014	Jun. 12, 2014	Apr. 28, 2014	Mar. 24, 2014	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF EQUITY
Dividends declared, common (in dollars per share)	$ 0.21875	$ 0.21875	$ 0.21875	$ 0.21875		$ 0.05	$ 0.70625
Dividends declared, preferred (in dollars per share)					$ 0.0302	$ 0.0403	$ 0.0705

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

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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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration