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Securities (Tables) | 9 Months Ended
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Sep. 30, 2012
Securities [Abstract] |
Securities available for sale |
|  | September 30, 2012 |  |  | December 31, 2011 |
|  | Amortized Cost |  |  | Unrealized |  |  | Fair Value |  |  | Amortized Cost |  |  | Unrealized |  |  | Fair Value |
|  | Gains |  |  | Losses |  |  |  |  | Gains |  |  | Losses |  |
U.S. Treasury |  | $ | 5,025 |  |  | $ | 25 |  |  | $ | 0 |  |  | $ | 5,050 |  |  | $ | 8,064 |  |  | $ | 66 |  |  | $ | 0 |  |  | $ | 8,130 |
U.S. Gov’t sponsored entities |  |  | 113,591 |  |  |  | 6,163 |  |  |  | (1 | ) |  |  | 119,753 |  |  |  | 102,258 |  |  |  | 5,249 |  |  |  | (15 | ) |  |  | 107,492 |
State & political subdivisions |  |  | 161,138 |  |  |  | 11,135 |  |  |  | (35 | ) |  |  | 172,238 |  |  |  | 149,685 |  |  |  | 8,844 |  |  |  | (92 | ) |  |  | 158,437 |
Residential mortgage & asset backed |  |  | 349,141 |  |  |  | 9,234 |  |  |  | (571 | ) |  |  | 357,804 |  |  |  | 292,297 |  |  |  | 8,043 |  |  |  | (214 | ) |  |  | 300,126 |
Commercial mortgage & asset backed |  |  | 1,875 |  |  |  | 72 |  |  |  | 0 |  |  |  | 1,947 |  |  |  | 2,077 |  |  |  | 45 |  |  |  | 0 |  |  |  | 2,122 |
Corporate notes & bonds |  |  | 17,366 |  |  |  | 40 |  |  |  | (2,887 | ) |  |  | 14,519 |  |  |  | 17,358 |  |  |  | 50 |  |  |  | (3,548 | ) |  |  | 13,860 |
Pooled trust preferred |  |  | 800 |  |  |  | 0 |  |  |  | (440 | ) |  |  | 360 |  |  |  | 800 |  |  |  | 0 |  |  |  | (460 | ) |  |  | 340 |
Pooled SBA |  |  | 44,097 |  |  |  | 1,964 |  |  |  | 0 |  |  |  | 46,061 |  |  |  | 44,851 |  |  |  | 1,282 |  |  |  | (77 | ) |  |  | 46,056 |
Other securities |  |  | 1,521 |  |  |  | 31 |  |  |  | 0 |  |  |  | 1,552 |  |  |  | 1,521 |  |  |  | 23 |  |  |  | 0 |  |  |  | 1,544 |
Total |  | $ | 694,554 |  |  | $ | 28,664 |  |  | $ | (3,934 | ) |  | $ | 719,284 |  |  | $ | 618,911 |  |  | $ | 23,602 |  |  | $ | (4,406 | ) |  | $ | 638,107 |
Trading securities accounted for under the fair value option |
|  | September 30, 2012 |  |  | December 31, 2011 |
Corporate equity securities |  | $ | 2,308 |  |  | $ | 1,959 |
Certificates of deposit |  |  | 407 |  |  |  | 255 |
International mutual funds |  |  | 267 |  |  |  | 257 |
Large cap growth mutual funds |  |  | 157 |  |  |  | 145 |
Large cap value mutual funds |  |  | 106 |  |  |  | 105 |
Corporate notes and bonds |  |  | 102 |  |  |  | 100 |
Money market mutual funds |  |  | 96 |  |  |  | 241 |
Real estate investment trust mutual funds |  |  | 66 |  |  |  | 68 |
U.S. Government sponsored entities |  |  | 58 |  |  |  | 55 |
Small cap mutual funds |  |  | 27 |  |  |  | 25 |
Mid cap mutual funds |  |  | 26 |  |  |  | 23 |
Total |  | $ | 3,620 |  |  | $ | 3,233 |
Securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position | September 30, 2012
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
Description of Securities |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |
U.S. Gov’t sponsored entities |  |  | 3,091 |  |  |  | (1 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 3,091 |  |  |  | (1 | )
State & political subdivisions |  |  | 4,870 |  |  |  | (35 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 4,870 |  |  |  | (35 | )
Residential mortgage & asset backed |  |  | 57,167 |  |  |  | (556 | ) |  |  | 1,181 |  |  |  | (15 | ) |  |  | 58,348 |  |  |  | (571 | )
Commercial mortgage & asset backed |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Corporate notes & bonds |  |  | 0 |  |  |  | 0 |  |  |  | 13,632 |  |  |  | (2,887 | ) |  |  | 13,632 |  |  |  | (2,887 | )
Pooled trust preferred |  |  | 0 |  |  |  | 0 |  |  |  | 360 |  |  |  | (440 | ) |  |  | 360 |  |  |  | (440 | )
Pooled SBA |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Other securities |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 65,128 |  |  | $ | (592 | ) |  | $ | 15,173 |  |  | $ | (3,342 | ) |  | $ | 80,301 |  |  | $ | (3,934 | )
December 31, 2011
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |  |  | $ | 0 |
U.S. Gov’t sponsored entities |  |  | 7,671 |  |  |  | (15 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 7,671 |  |  |  | (15 | )
State & political subdivisions |  |  | 5,314 |  |  |  | (92 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 5,314 |  |  |  | (92 | )
Residential mortgage & asset backed |  |  | 36,626 |  |  |  | (162 | ) |  |  | 9,485 |  |  |  | (52 | ) |  |  | 46,111 |  |  |  | (214 | )
Commercial mortgage & asset backed |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Corporate notes & bonds |  |  | 2,860 |  |  |  | (139 | ) |  |  | 8,841 |  |  |  | (3,409 | ) |  |  | 11,701 |  |  |  | (3,548 | )
Pooled trust preferred |  |  | 0 |  |  |  | 0 |  |  |  | 340 |  |  |  | (460 | ) |  |  | 340 |  |  |  | (460 | )
Pooled SBA |  |  | 8,139 |  |  |  | (77 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 8,139 |  |  |  | (77 | )
Other securities |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
|  | $ | 60,610 |  |  | $ | (485 | ) |  | $ | 18,666 |  |  | $ | (3,921 | ) |  | $ | 79,276 |  |  | $ | (4,406 | )
A roll-forward of the other-than-temporary impairment amount related to credit losses |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, beginning of period |  | $ | 4,054 |
Additional credit loss for which other-than-temporary impairment was not previously recognized |  |  | 0 |
Additional credit loss for which other-than-temporary impairment was previously recognized |  |  | 0 |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, end of period |  | $ | 4,054 |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, beginning of period |  | $ | 4,054 |
Additional credit loss for which other-than-temporary impairment was not previously recognized |  |  | 0 |
Additional credit loss for which other-than-temporary impairment was previously recognized |  |  | 0 |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, end of period |  | $ | 4,054 |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, beginning of period |  | $ | 3,656 |
Additional credit loss for which other-than-temporary impairment was not previously recognized |  |  | 0 |
Additional credit loss for which other-than-temporary impairment was previously recognized |  |  | 398 |
Balance of credit losses on debt securities for which a portion of other-than-temporary impairment was recognized in other comprehensive income, end of period |  | $ | 4,054 |
Information pertaining to security sales |
|  | Proceeds |  |  | Gross Gains |  |  | Gross Losses |
Three months ended September 30, 2012 |  | $ | 4,090 |  |  | $ | 103 |  |  | $ | 0 |
Nine months ended September 30, 2012 |  |  | 92,707 |  |  |  | 1,549 |  |  |  | (149 | )
Three months ended September 30, 2011 |  |  | 20,153 |  |  |  | 109 |  |  |  | (25 | )
Nine months ended September 30, 2011 |  |  | 43,763 |  |  |  | 255 |  |  |  | (97 | )
Schedule of the contractual maturity of securities available for sale, excluding equity securities |
|  | Amortized Cost |  |  | Fair Value |
1 year or less |  | $ | 19,219 |  |  | $ | 19,390 |
1 year – 5 years |  |  | 83,538 |  |  |  | 86,308 |
5 years – 10 years |  |  | 141,782 |  |  |  | 152,522 |
After 10 years |  |  | 97,478 |  |  |  | 99,761 |
|  |  | 342,017 |  |  |  | 357,981 |
Residential mortgage & asset backed securities |  |  | 349,141 |  |  |  | 357,804 |
Commercial mortgage & asset backed securities |  |  | 1,875 |  |  |  | 1,947 |
Total debt securities |  | $ | 693,033 |  |  | $ | 717,732 |

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