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UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $) | 3 Months Ended
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Mar. 31, 2014
Statement of Stockholders' Equity [Abstract] |
Preferred stock dividends (dollar per share) | $ 9.38us-gaap_PreferredStockDividendsPerShareDeclared

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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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Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration