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Securities (Tables) | 6 Months Ended
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Jun. 30, 2012
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 |
June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 58,285,000 |  |  | $ | 1,561,000 |  |  | $ | (10,000 | ) |  | $ | 59,836,000 |
Mortgage-backed securities |  |  | 25,780,000 |  |  |  | 2,273,000 |  |  |  | 0 |  |  |  | 28,053,000 |
Michigan Strategic Fund bonds |  |  | 11,360,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 11,360,000 |
Municipal general obligation bonds |  |  | 22,985,000 |  |  |  | 1,097,000 |  |  |  | 0 |  |  |  | 24,082,000 |
Municipal revenue bonds |  |  | 2,747,000 |  |  |  | 126,000 |  |  |  | 0 |  |  |  | 2,873,000 |
Mutual funds |  |  | 1,330,000 |  |  |  | 57,000 |  |  |  | 0 |  |  |  | 1,387,000 |
|  | $ | 122,487,000 |  |  | $ | 5,114,000 |  |  | $ | (10,000 | ) |  | $ | 127,591,000 |
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 86,783,000 |  |  | $ | 1,872,000 |  |  | $ | (59,000 | ) |  | $ | 88,596,000 |
Mortgage-backed securities |  |  | 31,851,000 |  |  |  | 2,759,000 |  |  |  | 0 |  |  |  | 34,610,000 |
Michigan Strategic Fund bonds |  |  | 16,700,000 |  |  |  | 0 |  |  |  | 0 |  |  |  | 16,700,000 |
Municipal general obligation bonds |  |  | 26,212,000 |  |  |  | 1,097,000 |  |  |  | 0 |  |  |  | 27,309,000 |
Municipal revenue bonds |  |  | 4,300,000 |  |  |  | 123,000 |  |  |  | 0 |  |  |  | 4,423,000 |
Mutual funds |  |  | 1,312,000 |  |  |  | 42,000 |  |  |  | 0 |  |  |  | 1,354,000 |
|  | $ | 167,158,000 |  |  | $ | 5,893,000 |  |  | $ | (59,000 | ) |  | $ | 172,992,000 |
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 |
June 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 4,836,000 |  |  | $ | (10,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 4,836,000 |  |  | $ | (10,000 | )
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 |
|  | $ | 4,836,000 |  |  | $ | (10,000 | ) |  | $ | 0 |  |  | $ | 0 |  |  | $ | 4,836,000 |  |  | $ | (10,000 | )
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agency debt obligations |  | $ | 9,765,000 |  |  | $ | (33,000 | ) |  | $ | 9,526,000 |  |  | $ | (26,000 | ) |  | $ | 19,291,000 |  |  | $ | (59,000 | )
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 |
|  | $ | 9,765,000 |  |  | $ | (33,000 | ) |  | $ | 9,526,000 |  |  | $ | (26,000 | ) |  | $ | 19,291,000 |  |  | $ | (59,000 | )
Maturities of securities and their weighted average yields |
|  | Weighted Average Yield |  |  | Amortized Cost |  |  | Fair Value |
Due in 2012 |  |  | NA |  |  | $ | 0 |  |  | $ | 0 |
Due in 2013 through 2017 |  |  | 5.03 | % |  |  | 6,807,000 |  |  |  | 7,118,000 |
Due in 2018 through 2022 |  |  | 3.83 |  |  |  | 23,302,000 |  |  |  | 23,756,000 |
Due in 2023 and beyond |  |  | 4.73 |  |  |  | 53,908,000 |  |  |  | 55,917,000 |
Mortgage-backed securities |  |  | 5.16 |  |  |  | 25,780,000 |  |  |  | 28,053,000 |
Michigan Strategic Fund bonds |  |  | 1.77 |  |  |  | 11,360,000 |  |  |  | 11,360,000 |
Mutual funds |  |  | 2.50 |  |  |  | 1,330,000 |  |  |  | 1,387,000 |
|  |  | 4.38 | % |  | $ | 122,487,000 |  |  | $ | 127,591,000 |

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