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SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Amortized Cost and Estimated Fair Value of Securities Available for Sale | Amortized cost and estimated fair value of securities available for sale at December 31, 2017 and 2016 are as follows (in thousands):
|  | 2017 |  | 2016
|  | Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Obligations of U.S. Government and U.S. Government sponsored enterprises |  | $ | 15,492 |  |  | $ | 15,491 |  |  | $ | 17,300 |  |  | $ | 17,455 |
Mortgage-backed securities, residential |  | 224,939 |  |  | 219,909 |  |  | 253,156 |  |  | 245,866 |
Obligations of states and political subdivisions |  | 52,928 |  |  | 53,132 |  |  | 38,843 |  |  | 38,740 |
Corporate bonds and notes |  | 249 |  |  | 251 |  |  | 249 |  |  | 250 |
SBA loan pools |  | 4,339 |  |  | 4,308 |  |  | 568 |  |  | 570 |
Corporate stocks |  | 265 |  |  | 536 |  |  | 285 |  |  | 521 |
Total |  | $ | 298,212 |  |  | $ | 293,627 |  |  | $ | 310,401 |  |  | $ | 303,402 |
Gross unrealized gains and losses on securities available for sale at December 31, 2017 and 2016, were as follows (in thousands):
|  | 2017 |  | 2016
|  | Unrealized Gains |  | Unrealized Losses |  | Unrealized Gains |  | Unrealized Losses
Obligations of U.S. Government and U.S. Government sponsored enterprises |  | $ | 20 |  |  | $ | 21 |  |  | $ | 155 |  |  | $ | — |
Mortgage-backed securities, residential |  | 136 |  |  | 5,166 |  |  | 202 |  |  | 7,492 |
Obligations of states and political subdivisions |  | 355 |  |  | 151 |  |  | 209 |  |  | 312 |
Corporate bonds and notes |  | 2 |  |  | — |  |  | 1 |  |  | — |
SBA loan pools |  | 1 |  |  | 32 |  |  | 3 |  |  | 1 |
Corporate stocks |  | 271 |  |  | — |  |  | 236 |  |  | — |
Total |  | $ | 785 |  |  | $ | 5,370 |  |  | $ | 806 |  |  | $ | 7,805 |
Amortized Cost and Estimated Fair Value of Debt Securities Available for Sale by Contractual Maturity | Securities not due at a single maturity date are shown separately (in thousands):
|  | December 31, 2017
|  | Amortized Cost |  | Fair Value
Within one year |  | $ | 16,998 |  |  | $ | 16,990 |
After one, but within five years |  | 21,048 |  |  | 21,074 |
After five, but within ten years |  | 12,700 |  |  | 12,746 |
After ten years |  | 17,923 |  |  | 18,064 |
Mortgage-backed securities, residential |  | 224,939 |  |  | 219,909 |
SBA loan pools |  | 4,339 |  |  | 4,308 |
Total |  | $ | 297,947 |  |  | $ | 293,091 |
Proceeds from Sales and Calls of Securities Resulting in Gains or Losses | The proceeds from sales and calls of securities resulting in gains or losses are listed below (in thousands):
|  | 2017 |  | 2016 |  | 2015
Proceeds |  | $ | 5,576 |  |  | $ | 40,413 |  |  | $ | 72,718 |
Gross gains |  | $ | 109 |  |  | $ | 989 |  |  | $ | 410 |
Gross losses |  | $ | — |  |  | $ | (2 | ) |  | $ | (38 | )
Tax expense |  | $ | 41 |  |  | $ | 373 |  |  | $ | 142 |
Amortized Cost and Estimated Fair Value of Securities Held to Maturity | Amortized cost and estimated fair value of securities held to maturity at December 31, 2017 and 2016 are as follows (in thousands):
|  | 2017 |  | 2016
|  | Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Obligations of states and political subdivisions |  | $ | 1,946 |  |  | $ | 1,946 |  |  | $ | 3,725 |  |  | $ | 3,931 |
Time deposits with other financial institutions |  | 1,835 |  |  | 1,830 |  |  | 980 |  |  | 981 |
|  | $ | 3,781 |  |  | $ | 3,776 |  |  | $ | 4,705 |  |  | $ | 4,912 |
Gross unrealized gains and losses on securities held to maturity at December 31, 2017 and 2016, were as follows (in thousands):
|  | 2017 |  | 2016
|  | Unrealized Gains |  | Unrealized Losses |  | Unrealized Gains |  | Unrealized Losses
Obligations of states and political subdivisions |  | $ | — |  |  | $ | — |  |  | $ | 206 |  |  | $ | — |
Time deposits with other financial institutions |  | — |  |  | 5 |  |  | 1 |  |  | — |
Total |  | $ | — |  |  | $ | 5 |  |  | $ | 207 |  |  | $ | — |
Contractual Maturities of Securities Held to Maturity | The contractual maturity of securities held to maturity is as follows at December 31, 2017 (in thousands):
|  | December 31, 2017
|  | Amortized Cost |  | Fair Value
Within one year |  | $ | 988 |  |  | $ | 986 |
After one, but within five years |  | 2,560 |  |  | 2,557 |
After five, but within ten years |  | 233 |  |  | 233 |
After ten years |  | — |  |  | — |
Total |  | $ | 3,781 |  |  | $ | 3,776 |
Investment Securities Available for Sale in Unrealized Loss Position | The following table summarizes the investment securities available for sale with unrealized losses at December 31, 2017 and December 31, 2016 by aggregated major security type and length of time in a continuous unrealized position (in thousands):
|  | Less than 12 months |  | 12 months or longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
2017 |
Obligations of U.S. Government and U.S. Government sponsored enterprises |  | $ | 14,982 |  |  | $ | 21 |  |  | $ | — |  |  | $ | — |  |  | $ | 14,982 |  |  | $ | 21 |
Mortgage-backed securities, residential |  | $ | 83,562 |  |  | $ | 1,013 |  |  | $ | 131,165 |  |  | $ | 4,153 |  |  | $ | 214,727 |  |  | $ | 5,166 |
Obligations of states and political subdivisions |  | 20,526 |  |  | 133 |  |  | 271 |  |  | 18 |  |  | 20,797 |  |  | 151 |
SBA loan pools |  | 3,937 |  |  | 32 |  |  | — |  |  | — |  |  | 3,937 |  |  | 32 |
Total temporarily impaired securities |  | $ | 123,007 |  |  | $ | 1,199 |  |  | $ | 131,436 |  |  | $ | 4,171 |  |  | $ | 254,443 |  |  | $ | 5,370 |
|  | Less than 12 months |  | 12 months or longer |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
2016 |
Mortgage-backed securities, residential |  | $ | 233,843 |  |  | $ | 7,492 |  |  | $ | — |  |  | $ | — |  |  | $ | 233,843 |  |  | $ | 7,492 |
Obligations of states and political subdivisions |  | 25,724 |  |  | 312 |  |  | — |  |  | — |  |  | 25,724 |  |  | 312 |
SBA loan pools |  | — |  |  | — |  |  | 225 |  |  | 1 |  |  | 225 |  |  | 1 |
Total temporarily impaired securities |  | $ | 259,567 |  |  | $ | 7,804 |  |  | $ | 225 |  |  | $ | 1 |  |  | $ | 259,792 |  |  | $ | 7,805 |
Securities Pledged to Secure Securities Sold under Agreements to Repurchase | The table below shows the securities pledged to secure securities sold under agreements to repurchase at December 31, 2017 and 2016 (in thousands):
|  | 2017 |  | 2016
|  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Obligations of U.S. Government and U. S. Government sponsored enterprises |  | $ | — |  |  | $ | — |  |  | $ | 1,231 |  |  | $ | 1,276 |
Mortgage-backed securities, residential |  | 12,082 |  |  | 11,798 |  |  | 37,769 |  |  | 37,000 |
Total |  | $ | 12,082 |  |  | $ | 11,798 |  |  | $ | 39,000 |  |  | $ | 38,276 |

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