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SECURITIES AVAILABLE FOR SALE (Tables) | 12 Months Ended
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Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Summary of Amortized Cost and Fair Value and Corresponding Amounts of Gross Unrealized Gains and Losses | The following table summarizes amortized cost and fair value of AFS securities at December 31, 2017 and 2016 and the corresponding amounts of gross unrealized gains and losses recognized in AOCI. At December 31, 2017 and 2016 all investment securities were classified as AFS.
(Dollars in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
December 31, 2017 |  |  |  |  |  |  |
States and political subdivisions | $ | 153,803 |  |  | $ | 6,133 |  |  | $ | 478 |  |  | $ | 159,458 |
GSE residential MBSs | 48,600 |  |  | 930 |  |  | 0 |  |  | 49,530 |
GSE residential CMOs | 113,658 |  |  | 296 |  |  | 2,835 |  |  | 111,119 |
Private label residential CMOs | 999 |  |  | 4 |  |  | 0 |  |  | 1,003 |
Private label commercial CMOs | 7,809 |  |  | 0 |  |  | 156 |  |  | 7,653 |
Asset-backed | 86,787 |  |  | 69 |  |  | 425 |  |  | 86,431 |
Total debt securities | 411,656 |  |  | 7,432 |  |  | 3,894 |  |  | 415,194 |
Equity securities | 50 |  |  | 64 |  |  | 0 |  |  | 114 |
Totals | $ | 411,706 |  |  | $ | 7,496 |  |  | $ | 3,894 |  |  | $ | 415,308 |
December 31, 2016 |  |  |  |  |  |  |
U.S. Government Agencies | $ | 39,569 |  |  | $ | 147 |  |  | $ | 124 |  |  | $ | 39,592 |
States and political subdivisions | 163,677 |  |  | 1,782 |  |  | 1,177 |  |  | 164,282 |
GSE residential MBSs | 116,022 |  |  | 928 |  |  | 6 |  |  | 116,944 |
GSE residential CMOs | 72,411 |  |  | 240 |  |  | 3,268 |  |  | 69,383 |
GSE commercial CMOs | 5,148 |  |  | 0 |  |  | 292 |  |  | 4,856 |
Private label residential CMOs | 5,042 |  |  | 0 |  |  | 36 |  |  | 5,006 |
Total debt securities | 401,869 |  |  | 3,097 |  |  | 4,903 |  |  | 400,063 |
Equity securities | 50 |  |  | 41 |  |  | 0 |  |  | 91 |
Totals | $ | 401,919 |  |  | $ | 3,138 |  |  | $ | 4,903 |  |  | $ | 400,154 |
Summary of Securities Available For Sale With Unrealized Losses | The following table summarizes AFS securities with unrealized losses at December 31, 2017 and 2016, aggregated by major security type and length of time in a continuous unrealized loss position.
| Less Than 12 Months |  | 12 Months or More |  | Total
(Dollars in thousands) | # of Securities |  | Fair Value |  | Unrealized Losses |  | # of Securities |  | Fair Value |  | Unrealized Losses |  | # of Securities |  | Fair Value |  | Unrealized Losses
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions | 7 |  |  | $ | 24,577 |  |  | $ | 473 |  |  | 1 |  |  | $ | 5,585 |  |  | $ | 5 |  |  | 8 |  |  | $ | 30,162 |  |  | $ | 478 |
GSE residential CMOs | 4 |  |  | 25,155 |  |  | 914 |  |  | 5 |  |  | 37,459 |  |  | 1,921 |  |  | 9 |  |  | 62,614 |  |  | 2,835 |
Private label commercial CMOs | 2 |  |  | 7,653 |  |  | 156 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 2 |  |  | 7,653 |  |  | 156 |
Asset-backed | 6 |  |  | 60,006 |  |  | 425 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 6 |  |  | 60,006 |  |  | 425 |
Totals | 19 |  |  | $ | 117,391 |  |  | $ | 1,968 |  |  | 6 |  |  | $ | 43,044 |  |  | $ | 1,926 |  |  | 25 |  |  | $ | 160,435 |  |  | $ | 3,894 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agencies | 6 |  |  | $ | 10,710 |  |  | $ | 23 |  |  | 2 |  |  | $ | 13,531 |  |  | $ | 101 |  |  | 8 |  |  | $ | 24,241 |  |  | $ | 124 |
States and political subdivisions | 25 |  |  | 58,924 |  |  | 610 |  |  | 1 |  |  | 5,075 |  |  | 567 |  |  | 26 |  |  | 63,999 |  |  | 1,177 |
GSE residential MBSs | 1 |  |  | 5,034 |  |  | 6 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 1 |  |  | 5,034 |  |  | 6 |
GSE residential CMOs | 6 |  |  | 59,534 |  |  | 3,264 |  |  | 1 |  |  | 634 |  |  | 4 |  |  | 7 |  |  | 60,168 |  |  | 3,268 |
GSE commercial CMOs | 1 |  |  | 4,856 |  |  | 292 |  |  | 0 |  |  | 0 |  |  | 0 |  |  | 1 |  |  | 4,856 |  |  | 292 |
Private label residential CMOs | 0 |  |  | 0 |  |  | 0 |  |  | 3 |  |  | 5,005 |  |  | 36 |  |  | 3 |  |  | 5,005 |  |  | 36 |
Totals | 39 |  |  | $ | 139,058 |  |  | $ | 4,195 |  |  | 7 |  |  | $ | 24,245 |  |  | $ | 708 |  |  | 46 |  |  | $ | 163,303 |  |  | $ | 4,903 |
Summary of Amortized Cost and Fair Value by Contractual Maturity | The following table summarizes amortized cost and fair value of AFS securities at December 31, 2017 by contractual maturity. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.
| Available for Sale
(Dollars in thousands) | Amortized Cost |  | Fair Value
Due in one year or less | $ | 0 |  |  | $ | 0 |
Due after one year through five years | 8,712 |  |  | 8,929 |
Due after five years through ten years | 49,958 |  |  | 51,188 |
Due after ten years | 95,133 |  |  | 99,341 |
MBSs and CMOs | 171,066 |  |  | 169,305 |
Asset-backed | 86,787 |  |  | 86,431 |
Total debt securities | 411,656 |  |  | 415,194 |
Equity securities | 50 |  |  | 114 |
Totals | $ | 411,706 |  |  | $ | 415,308 |
Summary of Proceeds from Sale of Available for Sale Securities | The following table summarizes proceeds from sales of AFS securities and gross gains and gross losses for the years ended December 31, 2017, 2016, and 2015.
| Years Ended December 31,
(Dollars in thousands) | 2017 |  | 2016 |  | 2015
Proceeds from sale of AFS securities | $ | 162,320 |  |  | $ | 64,742 |  |  | $ | 65,611 |
Gross gains | 1,477 |  |  | 1,468 |  |  | 1,948 |
Gross losses | 287 |  |  | 48 |  |  | 24 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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