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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract] |
Schedule of amortized cost and related market value of investment securities available-for-sale |
Investment Portfolio Composition. The amortized cost and related market value of investment securities available-for-sale and
held-to-maturity were as follows:
| September 30, 2016 |  |  | December 31, 2015
| Amortized |  | Unrealized |  | Unrealized |  | Market |  | Amortized |  | Unrealized |  | Unrealized |  | Market
| Cost |  | Gains |  | Losses |  | Value |  | Cost |  | Gain |  | Losses |  | Value
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 272,656 |  | $ | 1,029 |  | $ | - |  | $ | 273,685 |  | $ | 250,458 |  | $ | 101 |  | $ | 213 |  | $ | 250,346
U.S. Government Agency |  | 129,150 |  |  | 569 |  |  | 203 |  |  | 129,516 |  |  | 101,730 |  |  | 357 |  |  | 263 |  |  | 101,824
States and Political Subdivisions |  | 86,490 |  |  | 189 |  |  | 45 |  |  | 86,634 |  |  | 88,358 |  |  | 103 |  |  | 99 |  |  | 88,362
Mortgage-Backed Securities |  | 1,340 |  |  | 142 |  |  | - |  |  | 1,482 |  |  | 1,742 |  |  | 159 |  |  | - |  |  | 1,901
Equity Securities(1) |  | 8,822 |  |  | - |  |  | - |  |  | 8,822 |  |  | 8,595 |  |  | - |  |  | - |  |  | 8,595
Total | $ | 498,458 |  | $ | 1,929 |  | $ | 248 |  | $ | 500,139 |  | $ | 450,883 |  | $ | 720 |  | $ | 575 |  | $ | 451,028
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 129,323 |  | $ | 530 |  | $ | - |  | $ | 129,853 |  | $ | 134,554 |  | $ | 45 |  | $ | 160 |  | $ | 134,439
U.S. Government Agency |  | 1,904 |  |  | 1 |  |  | - |  |  | 1,905 |  |  | 10,043 |  |  | 7 |  |  | 5 |  |  | 10,045
States and Political Subdivisions |  | 9,983 |  |  | 69 |  |  | 1 |  |  | 10,051 |  |  | 15,693 |  |  | 38 |  |  | 7 |  |  | 15,724
Mortgage-Backed Securities |  | 48,718 |  |  | 366 |  |  | 64 |  |  | 49,020 |  |  | 27,602 |  |  | 4 |  |  | 407 |  |  | 27,199
Total | $ | 189,928 |  | $ | 966 |  | $ | 65 |  | $ | 190,829 |  | $ | 187,892 |  | $ | 94 |  | $ | 579 |  | $ | 187,407
Total Investment Securities | $ | 688,386 |  | $ | 2,895 |  | $ | 313 |  | $ | 690,968 |  | $ | 638,775 |  | $ | 814 |  | $ | 1,154 |  | $ | 638,435
Schedule of investment securities with maturity distribution based on contractual maturities |
| Available for Sale |  | Held to Maturity
| Amortized |  | Market |  | Amortized |  | Market
(Dollars in Thousands) | Cost |  | Value |  | Cost |  | Value
Due in one year or less | $ | 146,612 |  | $ | 146,872 |  | $ | 60,424 |  | $ | 60,503
Due after one through five years |  | 252,653 |  |  | 253,644 |  |  | 80,786 |  |  | 81,305
Mortgage-Backed Securities |  | 1,340 |  |  | 1,482 |  |  | 48,718 |  |  | 49,021
U.S. Government Agency |  | 89,031 |  |  | 89,319 |  |  | - |  |  | -
Equity Securities |  | 8,822 |  |  | 8,822 |  |  | - |  |  | -
Total | $ | 498,458 |  | $ | 500,139 |  | $ | 189,928 |  | $ | 190,829
Schedule of investment securities with continuous unrealized loss position |
| Less Than |  | Greater Than |  |  |  |  |  |
| 12 Months |  | 12 Months |  | Total
| Market |  | Unrealized |  | Market |  | Unrealized |  | Market |  | Unrealized
(Dollars in Thousands) | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
September 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Agency | $ | 36,793 |  | $ | 153 |  | $ | 10,123 |  | $ | 50 |  | $ | 46,916 |  | $ | 203
States and Political Subdivisions |  | 28,831 |  |  | 44 |  |  | 298 |  |  | 1 |  |  | 29,129 |  |  | 45
Total |  | 65,624 |  |  | 197 |  |  | 10,421 |  |  | 51 |  |  | 76,045 |  |  | 248
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
States and Political Subdivisions |  | 1,252 |  |  | 1 |  |  | - |  |  | - |  |  | 1,252 |  |  | 1
Mortgage-Backed Securities |  | 2,095 |  |  | 5 |  |  | 7,120 |  |  | 59 |  |  | 9,215 |  |  | 64
Total | $ | 3,347 |  | $ | 6 |  | $ | 7,120 |  | $ | 59 |  | $ | 10,467 |  | $ | 65
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury | $ | 150,061 |  | $ | 213 |  | $ | - |  | $ | - |  | $ | 150,061 |  | $ | 213
U.S. Government Agency |  | 43,508 |  |  | 200 |  |  | 9,644 |  |  | 63 |  |  | 53,152 |  |  | 263
States and Political Subdivisions |  | 39,608 |  |  | 86 |  |  | 5,066 |  |  | 13 |  |  | 44,674 |  |  | 99
Total |  | 233,177 |  |  | 499 |  |  | 14,710 |  |  | 76 |  |  | 247,887 |  |  | 575
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government Treasury |  | 92,339 |  |  | 160 |  |  | - |  |  | - |  |  | 92,339 |  |  | 160
U.S. Government Agency |  | 5,006 |  |  | 5 |  |  | - |  |  | - |  |  | 5,006 |  |  | 5
States and Political Subdivisions |  | 3,791 |  |  | 7 |  |  | - |  |  | - |  |  | 3,791 |  |  | 7
Mortgage-Backed Securities |  | 13,267 |  |  | 185 |  |  | 11,889 |  |  | 222 |  |  | 22,156 |  |  | 407
Total | $ | 114,403 |  | $ | 357 |  | $ | 11,889 |  | $ | 222 |  | $ | 126,292 |  | $ | 579

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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=6957658&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=73527792&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=73527792&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=6957658&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=73527792&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=73527792&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=73527792&loc=d3e27290-111563 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: 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=73527792&loc=d3e27290-111563 + Details
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