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Cash Due from Banks Interest-Bearing Deposits and Federal Funds Sold (Tables) | 12 Months Ended
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Dec. 31, 2012
Cash Due from Banks Interest Bearing Deposits and Federal Funds Sold [Abstract] |
Summary of average amount of required reserves | The average amount of required reserves for each of the years ended December 31, 2012 and 2011 is included in the following table:
|  | December 31, |
|  | 2012 |  |  | 2011 |
|  | (Dollars in thousands) |
Vault cash and excess funds with the Federal Reserve Bank |  | $ | 1,809,584 |  |  | $ | 1,554,010 |
Average required reserves |  |  | 38,949 |  |  |  | 35,744 |

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- Definition Tabular disclosure of reserves reported to other federal agencies or authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 2 -Paragraph 2 + Details
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