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Consolidated Statement of Changes in Stockholders' Equity Parenthetical (USD $) | 12 Months Ended
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Mar. 31, 2012 Series A preferred stock | Mar. 31, 2011 Series A preferred stock | Mar. 31, 2013 Common stock | Mar. 31, 2012 Common stock
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] |  |  |  |
Preferred stock dividends, Series A, per share | $ 0.53 | $ 2.13 |  |
Common stock dividends, per share |  |  | $ 5 | $ 1

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- Definition Aggregate dividends declared 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=6959260&loc=d3e187085-122770 + Details
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