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 |
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[1] | This category represents trust receivables that are not leveled. | |