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EMPLOYEE BENEFIT PLANS, Noncontributory Defined Benefit Pension Plan Fair Value of Plan Assets (Details) - Pension Plan [Member] - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 19,992,000 | $ 15,786,000
Allocation | 100.00% | 100.00%
Expected employer contribution to pension plan | $ 0 |
Expected future benefit payments [Abstract] |  |
2018 | 629,000 |
2019 | 1,896,000 |
2020 | 1,599,000 |
2021 | 1,421,000 |
2022 | 843,000 |
2023 - 2027 | 7,805,000 |
Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 15,935,000 | $ 11,502,000
Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 4,057,000 | 4,284,000
Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Cash and Cash Equivalents [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 3,827,000 | $ 863,000
Allocation | 19.10% | 5.50%
Cash and Cash Equivalents [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 3,827,000 | $ 863,000
Cash and Cash Equivalents [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Cash and Cash Equivalents [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Equity Securities [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 6,018,000 | $ 5,404,000
Allocation | 30.10% | 34.10%
Equity Securities [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 6,018,000 | $ 5,404,000
Equity Securities [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Equity Securities [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 | 0
Equity Securities [Member] | Minimum [Member] |  |
Target Allocations of Assets [Abstract] |  |
Target plan asset allocations | 50.00% |
Equity Securities [Member] | Maximum [Member] |  |
Target Allocations of Assets [Abstract] |  |
Target plan asset allocations | 70.00% |
Mutual Funds and ETF's [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 6,090,000 | $ 5,235,000
Allocation | 30.50% | 33.20%
Mutual Funds and ETF's [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 6,090,000 | $ 5,235,000
Mutual Funds and ETF's [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Mutual Funds and ETF's [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Corporate Bonds [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 3,469,000 | $ 3,641,000
Allocation | 17.40% | 23.10%
Corporate Bonds [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 | $ 0
Corporate Bonds [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 3,469,000 | 3,641,000
Corporate Bonds [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 | 0
Corporate Bonds [Member] | Minimum [Member] |  |
Target Allocations of Assets [Abstract] |  |
Target plan asset allocations | 30.00% |
Corporate Bonds [Member] | Maximum [Member] |  |
Target Allocations of Assets [Abstract] |  |
Target plan asset allocations | 50.00% |
Municipal Bonds [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 105,000 | $ 107,000
Allocation | 0.50% | 0.70%
Municipal Bonds [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 105,000 | $ 107,000
U.S. Agency Securities [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 483,000 | $ 536,000
Allocation | 2.40% | 3.40%
U.S. Agency Securities [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 | $ 0
U.S. Agency Securities [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 483,000 | 536,000
U.S. Agency Securities [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 | 0
Certificates of Deposit [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 |
Allocation | 0.00% |
Certificates of Deposit [Member] | Level I [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 0 |
Certificates of Deposit [Member] | Level II [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 |
Certificates of Deposit [Member] | Level III [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | 0 |
Common Stock [Member] |  |
Plan assets at fair value [Abstract] |  |
Fair value of plan assets | $ 684,000 | $ 548,000
Allocation | 3.40% | 3.50%

X
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