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EMPLOYEE RETIREMENT PLANS (Details 6) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | $ 38,369 | $ 32,278
Other assets [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total | [1] | 93 | 90
Exchange traded funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 5,546 | 3,742
Pooled fixed income funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 6,895 | 4,345
U.S. government securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 381 | 1,061
Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 2,444 | 2,519
Subtotal [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 38,276 | 32,188
Corporate obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 5,867 | 5,113
State and municipal obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 1,313 | 1,538
Common Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 15,483 | 13,626
Preferred Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 347 | 244
Fair Value, Inputs, Level 1 [Member] | Exchange traded funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 5,546 | 3,742
Fair Value, Inputs, Level 1 [Member] | Pooled fixed income funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 6,895 | 4,345
Fair Value, Inputs, Level 1 [Member] | U.S. government securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 2,444 | 2,519
Fair Value, Inputs, Level 1 [Member] | Subtotal [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 29,030 | 23,489
Fair Value, Inputs, Level 1 [Member] | Corporate obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 1 [Member] | State and municipal obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Common Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 13,855 | 12,656
Fair Value, Inputs, Level 1 [Member] | Preferred Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 290 | 227
Fair Value, Inputs, Level 2 [Member] | Exchange traded funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Pooled fixed income funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] | U.S. government securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 381 | 1,061
Fair Value, Inputs, Level 2 [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Subtotal [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 9,246 | 8,699
Fair Value, Inputs, Level 2 [Member] | Corporate obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 5,867 | 5,113
Fair Value, Inputs, Level 2 [Member] | State and municipal obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 1,313 | 1,538
Fair Value, Inputs, Level 2 [Member] | Common Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 1,628 | 970
Fair Value, Inputs, Level 2 [Member] | Preferred Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 57 | 17
Fair Value, Inputs, Level 3 [Member] | Exchange traded funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Pooled fixed income funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | U.S. government securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Cash and cash equivalents [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Subtotal [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Corporate obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | State and municipal obligations [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Common Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Preferred Stocks [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Pension Plan Assets, Total |  | $ 0 | $ 0
[1] | This category represents trust receivables that are not leveled.

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