INVESTMENT SECURITIES (Details) - USD ($) |
Mar. 31, 2019 |
Dec. 31, 2018 |
|||
|---|---|---|---|---|---|
| Available-for-sale | |||||
| Amortized Cost | $ 430,314,000 | $ 448,705,000 | |||
| Unrealized Gains | 905,000 | 727,000 | |||
| Unrealized Losses | 2,203,000 | 3,275,000 | |||
| Market Value | 429,016,000 | 446,157,000 | |||
| Held to Maturity | |||||
| Amortized Cost | 226,179,000 | 217,320,000 | |||
| Unrealized Gains | 668,000 | 220,000 | |||
| Unrealized Losses | 1,530,000 | 3,127,000 | |||
| Market Value | 225,317,000 | 214,413,000 | |||
| Total | |||||
| Amortized Cost | 656,493,000 | 666,025,000 | |||
| Unrealized Gain | 1,573,000 | 947,000 | |||
| Unrealized Loss | 3,733,000 | 6,402,000 | |||
| Fair Value | 654,333,000 | 660,570,000 | |||
| U.S. Government Treasury [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 254,265,000 | 264,298,000 | |||
| Unrealized Gains | 364,000 | 167,000 | |||
| Unrealized Losses | 1,688,000 | 2,616,000 | |||
| Market Value | 252,941,000 | 261,849,000 | |||
| Held to Maturity | |||||
| Amortized Cost | 35,076,000 | 35,088,000 | |||
| Unrealized Gains | 0 | 0 | |||
| Unrealized Losses | 311,000 | 477,000 | |||
| Market Value | 34,765,000 | 34,611,000 | |||
| U.S. Government Agency [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 133,566,000 | 133,201,000 | |||
| Unrealized Gains | 495,000 | 520,000 | |||
| Unrealized Losses | 468,000 | 515,000 | |||
| Market Value | 133,593,000 | 133,206,000 | |||
| States and Political Subdivisions [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 33,900,000 | 42,509,000 | |||
| Unrealized Gains | 3,000 | 0 | |||
| Unrealized Losses | 47,000 | 144,000 | |||
| Market Value | 33,856,000 | 42,365,000 | |||
| Held to Maturity | |||||
| Amortized Cost | 5,960,000 | 6,512,000 | |||
| Unrealized Gains | 0 | 0 | |||
| Unrealized Losses | 10,000 | 26,000 | |||
| Market Value | 5,950,000 | 6,486,000 | |||
| Mortgage-Backed Securities [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | 736,000 | 903,000 | |||
| Unrealized Gains | 43,000 | 40,000 | |||
| Unrealized Losses | 0 | 0 | |||
| Market Value | 779,000 | 943,000 | |||
| Held to Maturity | |||||
| Amortized Cost | 185,143,000 | 175,720,000 | |||
| Unrealized Gains | 668,000 | 220,000 | |||
| Unrealized Losses | 1,209,000 | 2,624,000 | |||
| Market Value | 184,602,000 | 173,316,000 | |||
| Equity Securities [Member] | |||||
| Available-for-sale | |||||
| Amortized Cost | [1] | 7,847,000 | 7,794,000 | ||
| Unrealized Gains | 0 | 0 | |||
| Unrealized Losses | 0 | 0 | |||
| Market Value | [1] | 7,847,000 | 7,794,000 | ||
| Federal Home Loan Bank | 3,100,000 | 3,000,000 | |||
| Federal Reserve Bank stock | $ 4,800,000 | $ 4,800,000 | |||
| |||||