EMPLOYEE BENEFIT PLANS (Details 7)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		100.00%	100.00%
Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	100.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		72.30%	3.50%
Cash and Cash Equivalents [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Cash and Cash Equivalents [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	100.00%
Common Stock [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		0.00%	0.40%
Common Stock [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Common Stock [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	40.00%
Domestic equity - all other [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		3.80%	0.70%
Domestic equity - all other [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Domestic equity - all other [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	40.00%
International equity [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		1.90%	0.20%
International equity [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
International equity [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	30.00%
Fixed Income Funds [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		2.10%	91.10%
Fixed Income Funds [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Fixed Income Funds [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	100.00%
Real Estate [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		9.50%	2.00%
Real Estate [Member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Real Estate [Member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	20.00%
Alternative/Opportunistic/Special [member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Percentage of plan assets		10.40%	2.10%
Alternative/Opportunistic/Special [member] | Minimum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	0.00%
Alternative/Opportunistic/Special [member] | Maximum [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Target allocation	20.00%