INVESTMENT SECURITIES (Details) - USD ($) |
Jun. 30, 2016 |
Dec. 31, 2015 |
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|---|---|---|---|---|---|
| Available-for-sale | |||||
| Amortized Cost | $ 483,010,000 | $ 450,883,000 | |||
| Unrealized Gains | 2,927,000 | 720,000 | |||
| Unrealized Losses | 89,000 | 575,000 | |||
| Market Value | 485,848,000 | 451,028,000 | |||
| Held to Maturity | |||||
| Amortized Cost | 204,474,000 | 187,892,000 | |||
| Unrealized Gains | 1,215,000 | 94,000 | |||
| Unrealized Losses | 94,000 | 579,000 | |||
| Market Value | 205,595,000 | 187,407,000 | |||
| Total | |||||
| Amortized Cost | 687,484,000 | 638,775,000 | |||
| Fair Value | 691,443,000 | 638,435,000 | |||
| U.S. Government Treasury [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 272,847,000 | 250,458,000 | |||
| Unrealized Gains | 1,672,000 | 101,000 | |||
| Unrealized Losses | 1,000 | 213,000 | |||
| Market Value | 274,518,000 | 250,346,000 | |||
| U.S. Government Agency [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 112,386,000 | 101,730,000 | |||
| Unrealized Gains | 618,000 | 357,000 | |||
| Unrealized Losses | 86,000 | 263,000 | |||
| Market Value | 112,918,000 | 101,824,000 | |||
| States and Political Subdivisions [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 87,391,000 | 88,358,000 | |||
| Unrealized Gains | 498,000 | 103,000 | |||
| Unrealized Losses | 2,000 | 99,000 | |||
| Market Value | 87,887,000 | 88,362,000 | |||
| Mortgage-Backed Securities [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 1,385,000 | 1,742,000 | |||
| Unrealized Gains | 139,000 | 159,000 | |||
| Unrealized Losses | 0 | 0 | |||
| Market Value | 1,524,000 | 1,901,000 | |||
| Equity Securities [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | [1] | 9,001,000 | 8,595,000 | ||
| Unrealized Gains | 0 | 0 | |||
| Unrealized Losses | 0 | 0 | |||
| Market Value | [1] | 9,001,000 | 8,595,000 | ||
| Federal Home Loan Bank | 3,700,000 | 3,600,000 | |||
| Federal Reserve Bank stock | 4,800,000 | 4,800,000 | |||
| FNBB, Inc. stock | 500,000 | 200,000 | |||
| U.S. Government Treasury [Member] | |||||
| Held to Maturity | |||||
| Amortized Cost | 144,453,000 | 134,554,000 | |||
| Unrealized Gains | 890,000 | 45,000 | |||
| Unrealized Losses | 0 | 160,000 | |||
| Market Value | 145,343,000 | 134,439,000 | |||
| U.S. Government Agency [Member] | |||||
| Held to Maturity | |||||
| Amortized Cost | 10,043,000 | ||||
| Unrealized Gains | 8,000 | 7,000 | |||
| Unrealized Losses | 0 | 5,000 | |||
| Market Value | 8,018,000 | 10,045,000 | |||
| States and Political Subdivisions [Member] | |||||
| Held to Maturity | |||||
| Amortized Cost | 11,384,000 | 15,693,000 | |||
| Unrealized Gains | 110,000 | 38,000 | |||
| Unrealized Losses | 0 | 7,000 | |||
| Market Value | 11,494,000 | 15,724,000 | |||
| Mortgage-Backed Securities [Member] | |||||
| Held to Maturity | |||||
| Amortized Cost | 27,602,000 | ||||
| Unrealized Gains | 207,000 | 4,000 | |||
| Unrealized Losses | 94,000 | 407,000 | |||
| Market Value | $ 40,740,000 | $ 27,199,000 | |||
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