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Securities (Details 4) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 Securities | Dec. 31, 2012 Securities
Estimated Fair Value, Less than 12 months | $ 86,135 | $ 9,116
Unrealized Losses, Less than 12 months | (3,074) | (50)
Estimated Fair Value, 12 months or longer | 1,716 | 1,392
Unrealized Losses, 12 months or longer | (3,492) | (3,816)
Estimated Fair Value, Total | 87,851 | 10,508
Unrealized Losses, Total | (6,566) | (3,866)
Number of securities, Unrealized Losses, Less than 12 months | 103 | 14
Number of securities, Unrealized Losses, 12 months or longer | 4 | 4
Number of securities, Unrealized Losses, Total | 107 | 18
US Government-sponsored Enterprises Debt Securities [Member] |  |
Estimated Fair Value, Less than 12 months | 18,410 | 3,492
Unrealized Losses, Less than 12 months | (588) | (7)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 18,410 | 3,492
Unrealized Losses, Total | (588) | (7)
Collateralized Mortgage Backed Securities [Member] |  |
Estimated Fair Value, Less than 12 months | 43,566 | 2,294
Unrealized Losses, Less than 12 months | (1,015) | (15)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 43,566 | 2,294
Unrealized Losses, Total | (1,015) | (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 | 1,716 | 1,392
Unrealized Losses, 12 months or longer | (3,492) | (3,816)
Estimated Fair Value, Total | 1,716 | 1,392
Unrealized Losses, Total | (3,492) | (3,816)
Municipal Bonds [Member] |  |
Estimated Fair Value, Less than 12 months | 24,159 | 3,330
Unrealized Losses, Less than 12 months | (1,471) | (28)
Estimated Fair Value, 12 months or longer | 0 | 0
Unrealized Losses, 12 months or longer | 0 | 0
Estimated Fair Value, Total | 24,159 | 3,330
Unrealized Losses, Total | $ (1,471) | $ (28)

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