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INVESTMENT SECURITIES | 12 Months Ended
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Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
INVESTMENT SECURITIES |
Note 2
INVESTMENT SECURITIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Portfolio Composition. The amortized cost and related market value of investment securities available-for-sale and
held-to-maturity were as follows:
| 2017 |  |  | 2016
| Amortized |  | Unrealized | Unrealized | Market |  | Amortized |  | Unrealized | Unrealized | Market
(Dollars in Thousands) | Cost |  | Gains |  | Losses |  | Value |  | Cost |  | Gain |  | Losses |  | Value
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 237,505 |  | $ | - |  | $ | 2,164 |  | $ | 235,341 |  | $ | 286,867 |  | $ | 262 |  | $ | 851 |  | $ | 286,278
U.S. Government Agency |  | 144,324 |  |  | 727 |  |  | 407 |  |  | 144,644 |  |  | 131,489 |  |  | 495 |  |  | 344 |  |  | 131,640
States and Political Subdivisions |  | 91,533 |  |  | 2 |  |  | 378 |  |  | 91,157 |  |  | 95,197 |  |  | 23 |  |  | 381 |  |  | 94,839
Mortgage-Backed Securities |  | 1,102 |  |  | 83 |  |  | - |  |  | 1,185 |  |  | 1,312 |  |  | 118 |  |  | - |  |  | 1,430
Equity Securities(1) |  | 8,584 |  |  | - |  |  | - |  |  | 8,584 |  |  | 8,547 |  |  | - |  |  | - |  |  | 8,547
Total | $ | 483,048 |  | $ | 812 |  | $ | 2,949 |  | $ | 480,911 |  | $ | 523,412 |  | $ | 898 |  | $ | 1,576 |  | $ | 522,734
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 98,256 |  | $ | - |  | $ | 441 |  | $ | 97,815 |  | $ | 119,131 |  | $ | 107 |  | $ | 81 |  | $ | 119,157
States and Political Subdivisions |  | 6,996 |  |  | - |  |  | 41 |  |  | 6,955 |  |  | 8,175 |  |  | 1 |  |  | 38 |  |  | 8,138
Mortgage-Backed Securities |  | 111,427 |  |  | 22 |  |  | 1,212 |  |  | 110,237 |  |  | 50,059 |  |  | 29 |  |  | 637 |  |  | 49,451
Total | $ | 216,679 |  | $ | 22 |  | $ | 1,694 |  | $ | 215,007 |  | $ | 177,365 |  | $ | 137 |  | $ | 756 |  | $ | 176,746
Total Investment Securities | $ | 699,727 |  | $ | 834 |  | $ | 4,643 |  | $ | 695,918 |  | $ | 700,777 |  | $ | 1,035 |  | $ | 2,332 |  | $ | 699,480
(1) Includes Federal Home Loan Bank, Federal Reserve Bank and FNBB Inc. stock recorded at cost of $3.1 million, $4.8 million, and $0.8 million, respectively, at December 31, 2017 and Federal Home Loan Bank, Federal Reserve Bank and FNBB, Inc. stock at $3.3 million, $4.8 million and $0.5 million , respectively, at December 31, 2016. Securities with an amortized cost of $328.1 million and $332.7 million at December 31, 2017 and December 31, 2016, respectively, were pledged to secure public dep osits and for other purposes. The Bank, as a member of the Federal Home Loan Bank of Atlanta (“FHLB”), is required to own capital stock in the FHLB based generally upon the balances of residential and commercial real estate loans, and FHLB advances. FHLB stock which is included in other securities is pledged to secure FHLB advances. No ready market exists for this stock, and it has no quoted market value; however, redemption of this stock has historically been at par value. As a member of the Federal Re serve Bank of Atlanta, the Bank is required to maintain stock in the Federal Reserve Bank of Atlanta based on a specified ratio relative to the Bank’s capital. Federal Reserve Bank stock is carried at cost and may be sold back to the Federal Reserve Bank at its carrying value. Investment Sales. There were no sales of investment securities for each of the last three years. Maturity Distribution. At December 31, 2017, the Company's investment securities had the following maturity distribution based on contractual maturity. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations. Mortgage-backed securities and certain amortizing U.S. government agency securities are shown separately since they are not due at a certain maturity date.
| Available for Sale |  | Held to Maturity
| Amortized |  | Market |  | Amortized |  | Market
(Dollars in Thousands) | Cost |  | Value |  | Cost |  | Value
Due in one year or less | $ | 107,977 |  | $ | 107,740 |  | $ | 63,381 |  | $ | 63,271
Due after one through five years |  | 258,193 |  |  | 255,593 |  |  | 41,871 |  |  | 41,499
Mortgage-Backed Securities |  | 1,102 |  |  | 1,185 |  |  | 111,427 |  |  | 110,237
U.S. Government Agency |  | 107,192 |  |  | 107,809 |  |  | - |  |  | -
Equity Securities |  | 8,584 |  |  | 8,584 |  |  | - |  |  | -
Total | $ | 483,048 |  | $ | 480,911 |  | $ | 216,679 |  | $ | 215,007
Unrealized Losses. The following table summarizes the investment securities with unrealized losses at December 31, aggregated by major security type and length of time in a continuous unrealized loss position:
| Less Than 12 Months |  | Greater Than 12 Months |  | Total
| Market |  | Unrealized |  | Market |  | Unrealized |  | Market |  | Unrealized
(Dollars in Thousands) | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 155,443 |  | $ | 963 |  | $ | 79,900 |  | $ | 1,201 |  | $ | 235,343 |  | $ | 2,164
U.S. Government Agency |  | 45,737 |  |  | 150 |  |  | 25,757 |  |  | 257 |  |  | 71,494 |  |  | 407
States and Political Subdivisions |  | 82,999 |  |  | 320 |  |  | 5,549 |  |  | 58 |  |  | 88,548 |  |  | 378
Mortgage-Backed Securities |  | 2 |  |  | - |  |  | - |  |  | - |  |  | 2 |  |  | -
Total |  | 284,181 |  |  | 1,433 |  |  | 111,206 |  |  | 1,516 |  |  | 395,387 |  |  | 2,949
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury |  | 77,861 |  |  | 298 |  |  | 14,939 |  |  | 143 |  |  | 92,800 |  |  | 441
States and Political Subdivisions |  | 6,955 |  |  | 41 |  |  | - |  |  | - |  |  | 6,955 |  |  | 41
Mortgage-Backed Securities |  | 56,030 |  |  | 469 |  |  | 30,216 |  |  | 743 |  |  | 86,246 |  |  | 1,212
Total | $ | 140,846 |  | $ | 808 |  | $ | 45,155 |  | $ | 886 |  | $ | 186,001 |  | $ | 1,694
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 116,704 |  | $ | 851 |  | $ | - |  | $ | - |  | $ | 116,704 |  | $ | 851
U.S. Government Agency |  | 48,520 |  |  | 310 |  |  | 6,699 |  |  | 34 |  |  | 55,219 |  |  | 344
States and Political Subdivisions |  | 81,521 |  |  | 380 |  |  | 294 |  |  | 1 |  |  | 81,815 |  |  | 381
Mortgage-Backed Securities |  | 3 |  |  | - |  |  | - |  |  | - |  |  | 3 |  |  | -
Total |  | 246,748 |  |  | 1,541 |  |  | 6,993 |  |  | 35 |  |  | 253,741 |  |  | 1,576
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury |  | 35,210 |  |  | 81 |  |  | - |  |  | - |  |  | 35,210 |  |  | 81
States and Political Subdivisions |  | 7,491 |  |  | 38 |  |  | - |  |  | - |  |  | 7,491 |  |  | 38
Mortgage-Backed Securities |  | 36,710 |  |  | 599 |  |  | 4,010 |  |  | 38 |  |  | 40,720 |  |  | 637
Total | $ | 79,411 |  | $ | 718 |  | $ | 4,010 |  | $ | 38 |  | $ | 83,421 |  | $ | 756
Management evaluates securities for other than temporary impairment at least quarterly, and more frequently when economic or market concerns warrant such evaluation. Declines in the fair value of held-to-maturity and available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, the Company considers, (i) whether it has decided to sell the security, (ii) whether it is more likel y than not that the Company will have to sell the security before its market value recovers, and (iii) whether the present value of expected cash flows is sufficient to recover the entire amortized cost basis. When assessing a security’s expected cash flo ws, the Company considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost and (ii) the financial condition and near-term prospects of the issuer. In analyzing an issuer’s financial condition, mana gement considers whether the securities are issued by the federal government or its agencies, whether downgrades by rating agencies have occurred, regulatory issues, and analysts’ reports. At December 31, 2017, there were 532 positions (combined AFS and HTM) with unrealized losses totaling $4.6 million. 67 of these positions were U.S. government treasury securities guaranteed by the U.S. government. 159 of these positions were U.S. government agency and mortgage-backed securities issued by U.S. governme nt sponsored entities. The remaining 306 securities are direct obligations of the US Government (23) and municipal bonds (283). Municipal bonds are relatively short-term in nature (less than 5 years), and hold a minimum rating of A+, with over 70% of the municipal bond portfolio pre-refunded with US Treasury securities. Because the declines in the market value of these securities are attributable to changes in interest rates and not credit quality and because the Company has the present ability and intent to hold these investments until there is a recovery in fair value, which may be at maturity, the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2017.

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