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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical)	12 Months Ended
	Dec. 31, 2014 $ / shares
Statement of Stockholders' Equity [Abstract]
Preferred stock dividends (in dollars per share)	$ 18.75

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- Definition

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

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration