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Securities (Details 4) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 Securities | Dec. 31, 2012 Securities
--- | --- | ---
Estimated Fair Value, Less than 12 months | $ 15,807 | $ 9,116
Unrealized Losses, Less than 12 months | (193) | (50)
Estimated Fair Value, 12 months or longer | 1,587 | 1,392
Unrealized Losses, 12 months or longer | (3,621) | (3,816)
Estimated Fair Value, Total | 17,394 | 10,508
Unrealized Losses, Total | (3,814) | (3,866)
Number of securities, Unrealized Losses, Less than 12 months | 23 | 14
Number of securities, Unrealized Losses, 12 months or longer | 4 | 4
Number of securities, Unrealized Losses, Total | 27 | 18
US Government-sponsored Enterprises Debt Securities [Member] |  |
Estimated Fair Value, Less than 12 months | 3,487 | 3,492
Unrealized Losses, Less than 12 months | (12) | (7)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 3,487 | 3,492
Unrealized Losses, Total | (12) | (7)
Collateralized Mortgage Backed Securities [Member] |  |
Estimated Fair Value, Less than 12 months | 6,516 | 2,294
Unrealized Losses, Less than 12 months | (52) | (15)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 6,516 | 2,294
Unrealized Losses, Total | (52) | (15)
Collateralized Debt Obligations [Member] |  |
Estimated Fair Value, Less than 12 months | 0 | 0
Unrealized Losses, Less than 12 months | 0 | 0
Estimated Fair Value, 12 months or longer | 1,587 | 1,392
Unrealized Losses, 12 months or longer | (3,621) | (3,816)
Estimated Fair Value, Total | 1,587 | 1,392
Unrealized Losses, Total | (3,621) | (3,816)
Municipal Bonds [Member] |  |
Estimated Fair Value, Less than 12 months | 5,804 | 3,330
Unrealized Losses, Less than 12 months | (129) | (28)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 5,804 | 3,330
Unrealized Losses, Total | $ (129) | $ (28)

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