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Securities (Tables) | 3 Months Ended
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Mar. 31, 2013
Securities [Abstract] |
Amortized cost and fair value of available for sale securities and related pre-tax gross unrealized gains and losses |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
March 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 83,936,000 |  |  | $ | 766,000 |  |  | $ | (690,000 | ) |  | $ | 84,012,000 |
Mortgage-backed securities |  |  | 17,567,000 |  |  |  | 1,555,000 |  |  |  | 0 |  |  |  | 19,122,000 |
Michigan Strategic Fund bonds |  |  | 11,070,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 11,070,000 |
Municipal general obligation bonds |  |  | 21,702,000 |  |  |  | 906,000 |  |  |  | 0 |  |  |  | 22,608,000 |
Municipal revenue bonds |  |  | 1,728,000 |  |  |  | 70,000 |  |  |  | 0 |  |  |  | 1,798,000 |
Mutual funds |  |  | 1,361,000 |  |  |  | 42,000 |  |  |  | 0 |  |  |  | 1,403,000 |
|  | $ | 137,364,000 |  |  | $ | 3,339,000 |  |  | $ | (690,000 | ) |  | $ | 140,013,000 |
December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 78,447,000 |  |  | $ | 1,039,000 |  |  | $ | (388,000 | ) |  | $ | 79,098,000 |
Mortgage-backed securities |  |  | 20,182,000 |  |  |  | 1,814,000 |  |  |  | 0 |  |  |  | 21,996,000 |
Michigan Strategic Fund bonds |  |  | 11,255,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 11,255,000 |
Municipal general obligation bonds |  |  | 21,700,000 |  |  |  | 1,043,000 |  |  |  | 0 |  |  |  | 22,743,000 |
Municipal revenue bonds |  |  | 1,726,000 |  |  |  | 91,000 |  |  |  | 0 |  |  |  | 1,817,000 |
Mutual funds |  |  | 1,354,000 |  |  |  | 51,000 |  |  |  | 0 |  |  |  | 1,405,000 |
|  | $ | 134,664,000 |  |  | $ | 4,038,000 |  |  | $ | (388,000 | ) |  | $ | 138,314,000 |
Securities with unrealized losses aggregated by investment category and length of time |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
March 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 47,229,000 |  |  | $ | (690,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 47,229,000 |  |  | $ | (690,000 | )
Mortgage-backed securities |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Michigan Strategic Fund bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Municipal general obligation bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Municipal revenue bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Mutual funds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 47,229,000 |  |  | $ | (690,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 47,229,000 |  |  | $ | (690,000 | )
December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 33,555,000 |  |  | $ | (388,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 33,555,000 |  |  | $ | (388,000 | )
Mortgage-backed securities |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Michigan Strategic Fund bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Municipal general obligation bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Municipal revenue bonds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Mutual funds |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 33,555,000 |  |  | $ | (388,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 33,555,000 |  |  | $ | (388,000 | )
Maturities of securities and their weighted average yields |
|  | Weighted Average Yield |  |  | Amortized Cost |  |  | Fair Value |
Due in 2013 |  |  | 5.93 | % |  | $ | 4,244,000 |  |  | $ | 4,269,000 |
Due in 2014 through 2018 |  |  | 4.99 |  |  |  | 4,649,000 |  |  |  | 4,819,000 |
Due in 2019 through 2023 |  |  | 3.35 |  |  |  | 29,434,000 |  |  |  | 29,725,000 |
Due in 2024 and beyond |  |  | 3.80 |  |  |  | 69,039,000 |  |  |  | 69,605,000 |
Mortgage-backed securities |  |  | 5.18 |  |  |  | 17,567,000 |  |  |  | 19,122,000 |
Michigan Strategic Fund bonds |  |  | 1.73 |  |  |  | 11,070,000 |  |  |  | 11,070,000 |
Mutual funds |  |  | 2.04 |  |  |  | 1,361,000 |  |  |  | 1,403,000 |
|  |  | 3.82 | % |  | $ | 137,364,000 |  |  | $ | 140,013,000 |

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