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INVESTMENT SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract] |
Amortized Cost and Fair Value of Available-for-Sale Investment Securities | The amortized cost and fair value of available-for-sale investment securities at December 31 are summarized as follows (in thousands):
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
2014 |  |  |  |  |  |  |
Investment Securities Available-for-Sale: |  |  |  |  |  |  |
U.S. Treasury notes | $ | 62,406 |  |  | 290 |  |  | 136 |  |  | 62,560 |
U.S. Agency notes | 84,661 |  |  | 188 |  |  | 1,212 |  |  | 83,637 |
U.S. Agency mortgage-backed securities | 37,838 |  |  | 413 |  |  | 219 |  |  | 38,032 |
Certificates of deposit | 3,076 |  |  | 10 |  |  | — |  |  | 3,086 |
Municipal securities: |  |  |  |  |  |  |  |  |  |  |
Non-taxable | 75,727 |  |  | 1,972 |  |  | 304 |  |  | 77,395 |
Taxable | 16,005 |  |  | 465 |  |  | 75 |  |  | 16,395 |
Mutual funds | 2,483 |  |  | — |  |  | 22 |  |  | 2,461 |
Trust preferred securities | 50 |  |  | — |  |  | — |  |  | 50 |
Equity securities | 1,415 |  |  | 372 |  |  | 38 |  |  | 1,749 |
| $ | 283,661 |  |  | 3,710 |  |  | 2,006 |  |  | 285,365 |
Investment Securities Held-to-Maturity: |  |  |  |  |  |  |
Municipal securities: |  |  |  |  |  |  |
Non-taxable | $ | 22,525 |  |  | 108 |  |  | 695 |  |  | 21,938 |
Taxable | 200 |  |  | — |  |  | — |  |  | 200 |
| $ | 22,725 |  |  | 108 |  |  | 695 |  |  | 22,138 |
2013 |  |  |  |  |  |  |
Investment Securities Available-for-Sale: |  |  |  |  |  |  |
U.S. Treasury notes | $ | 13,184 |  |  | — |  |  | 290 |  |  | 12,894 |
U.S. Agency notes | 110,248 |  |  | 141 |  |  | 3,714 |  |  | 106,675 |
U.S. Agency mortgage-backed securities | 40,602 |  |  | 555 |  |  | 848 |  |  | 40,309 |
Certificates of deposit | 1,492 |  |  | 9 |  |  | — |  |  | 1,501 |
Municipal securities: |  |  |  |  |  |  |  |  |  |  |
Non-taxable | 74,185 |  |  | 2,116 |  |  | 968 |  |  | 75,333 |
Taxable | 17,020 |  |  | 503 |  |  | 214 |  |  | 17,309 |
Mutual funds | 2,419 |  |  | — |  |  | 39 |  |  | 2,380 |
Trust preferred securities | 149 |  |  | 4 |  |  | 6 |  |  | 147 |
Equity securities | 1,429 |  |  | 329 |  |  | 65 |  |  | 1,693 |
| $ | 260,728 |  |  | 3,657 |  |  | 6,144 |  |  | 258,241 |
Investment Securities Held-to-Maturity: |  |  |  |  |  |  |
Municipal securities: |  |  |  |  |  |  |
Non-taxable | $ | 15,923 |  |  | 159 |  |  | 285 |  |  | 15,797 |
Taxable | 400 |  |  | — |  |  | 1 |  |  | 399 |
| $ | 16,323 |  |  | 159 |  |  | 286 |  |  | 16,196 |
Securities in a Continuous Loss Position | Information concerning securities with gross unrealized losses at December 31, 2014 and 2013, aggregated by length of time that individual securities have been in a continuous loss position, is as follows (in thousands):
| Less Than Twelve Months |  | Twelve Months or More
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
2014 |  |  |  |  |  |  |
Investment Securities Available-for-Sale: |  |  |  |  |  |  |
U.S. Treasury notes | $ | 9,141 |  |  | 7 |  |  | 8,774 |  |  | 129 |
U.S. Agency notes | — |  |  | — |  |  | 65,971 |  |  | 1,212 |
U.S. Agency mortgage-backed securities | 3,795 |  |  | 2 |  |  | 11,456 |  |  | 217 |
Municipal securities: |  |  |  |  |  |  |  |  |  |
Non-taxable | 7,211 |  |  | 58 |  |  | 11,419 |  |  | 246 |
Taxable | 3,117 |  |  | 15 |  |  | 3,668 |  |  | 60 |
Mutual funds | 281 |  |  | 12 |  |  | 1,190 |  |  | 10 |
Trust preferred securities | 50 |  |  | — |  |  | — |  |  | — |
Equity securities | 197 |  |  | 29 |  |  | 123 |  |  | 9 |
| $ | 23,792 |  |  | 123 |  |  | 102,601 |  |  | 1,883 |
Investment Securities Held-to-Maturity: |  |  |  |  |  |  |
Municipal securities: |  |  |  |  |  |  |
Non-taxable | $ | 8,152 |  |  | 540 |  |  | 4,200 |  |  | 155 |
Taxable | — |  |  | — |  |  | — |  |  | — |
| $ | 8,152 |  |  | 540 |  |  | 4,200 |  |  | 155 |
2013 |  |  |  |  |  |  |
Investment Securities Available-for-Sale: |  |  |  |  |  |  |
U.S. Treasury notes | $ | 12,894 |  |  | 290 |  |  | — |  |  | — |
U.S. Agency notes | 89,080 |  |  | 2,880 |  |  | 9,636 |  |  | 834 |
U.S. Agency mortgage-backed securities | 17,557 |  |  | 575 |  |  | 5,130 |  |  | 273 |
Municipal securities: |  |  |  |  |  |  |
Non-taxable | 15,641 |  |  | 398 |  |  | 10,751 |  |  | 570 |
Taxable | 4,903 |  |  | 202 |  |  | 1,252 |  |  | 12 |
Mutual funds | 1,380 |  |  | 39 |  |  | — |  |  | — |
Trust preferred securities | — |  |  | — |  |  | 93 |  |  | 6 |
Equity securities | 300 |  |  | 44 |  |  | 93 |  |  | 21 |
| $ | 141,755 |  |  | 4,428 |  |  | 26,955 |  |  | 1,716 |
Investment Securities Held-to-Maturity: |  |  |  |  |  |  |
Municipal securities: |  |  |  |  |  |  |
Non-taxable | $ | 4,890 |  |  | 285 |  |  | — |  |  | — |
Taxable | 399 |  |  | 1 |  |  | — |  |  | — |
| $ | 5,289 |  |  | 286 |  |  | — |  |  | — |
Investments Classified by Contractual Maturity Date | Contractual maturities of investment securities at December 31, 2014 were as follows (in thousands). Actual maturities may differ from contractual maturities when issuers have the right to call or prepay obligations.
| Available-for-Sale |  | Held-to-Maturity
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Due within one year | $ | 10,961 |  |  | 11,071 |  |  | 2,649 |  |  | 2,661 |
Due from one to five years | 133,901 |  |  | 134,894 |  |  | 3,669 |  |  | 3,665 |
Due from five to ten years | 92,453 |  |  | 92,493 |  |  | 4,175 |  |  | 4,063 |
Due after ten years | 4,560 |  |  | 4,615 |  |  | 12,232 |  |  | 11,749 |
| 241,875 |  |  | 243,073 |  |  | 22,725 |  |  | 22,138 |
U.S. Agency mortgage-backed securities | 37,838 |  |  | 38,032 |  |  | — |  |  | — |
Mutual funds | 2,483 |  |  | 2,461 |  |  | — |  |  | — |
Trust preferred securities | 50 |  |  | 50 |  |  | — |  |  | — |
Equity securities | 1,415 |  |  | 1,749 |  |  | — |  |  | — |
| $ | 283,661 |  |  | 285,365 |  |  | 22,725 |  |  | 22,138 |
Realized Gain (Loss) on Investment Securities Available-for-Sale | Certain information concerning the sale of investment securities available-for-sale for the years ended December 31 was as follows (in thousands):
| 2014 |  | 2013 |  | 2012
Proceeds from sales | $ | 67,296 |  |  | 59,284 |  |  | 90,573 |
Gross realized gains | 252 |  |  | 1,234 |  |  | 1,860 |
Gross realized losses | 103 |  |  | 174 |  |  | 7 |

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