v3.19.3.a.u2
EMPLOYEE BENEFIT PLANS Narrative 3 (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Plan contributions $ 11,132 $ 11,034
Estimated future employer contributions in next fiscal year 11,300  
Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Plan contributions 155 $ 168
Estimated future employer contributions in next fiscal year $ 400