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Preferred Stock (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 11, 2011 | Sep. 30, 2015
Noncumulative Series E Preferred Stock [Member] |  |
Temporary Equity [Line Items] |  |
Dividend rate |  | 1.00%
Series E Preferred Stock [Member] |  |
Temporary Equity [Line Items] |  |
Shares of stock issued | 21,000 |
Value of stock issued | $ 21 |
Dividend rate |  | 9.00%
Minimum Tier 1 capital required to pay dividends |  | 90.00%
Redemption price, percent of liquidation amount |  | 100.00%

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