Annual report pursuant to Section 13 and 15(d)

RETIREMENT PLANS AND RELATED POST RETIREMENT BENEFITS - Narrative (Details)

v3.22.0.1
RETIREMENT PLANS AND RELATED POST RETIREMENT BENEFITS - Narrative (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
retirement_plan
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure      
Number of non-qualified supplemental retirement defined benefit plans | retirement_plan 2    
Accumulated benefit obligation of the plans $ 28,500,000 $ 29,400,000  
Fair value of plan assets at period end 0 0  
Unrecognized prior service costs 1,400,000    
Unrecognized prior service costs, net 2,000,000    
Unrecognized prior service costs, tax 600,000    
Unrecognized actuarial losses 6,700,000    
Unrecognized actuarial gain (losses), net 8,300,000    
Unrecognized actuarial losses, tax 1,600,000    
Unfunded liability $ 300,000 300,000  
Percentage of fund 93.70%    
Contribution of employer $ 400,000 500,000 $ 1,100,000
Total employer contribution 1.00%    
SERP      
Defined Benefit Plan Disclosure      
Increase in the discount rate 0.33%    
Current accrued pension liability $ 300,000    
Long-term accrued pension liability 30,200,000    
Expected future payments in 2021 (less than for SERP Medical) 300,000    
Expected future payments in 2022 (less than for SERP Medical) 300,000    
Expected future payments in 2023 (less than for SERP Medical) 600,000    
Expected future payments in 2024 (less than for SERP Medical) 600,000    
Expected future payments in 2025 (less than for SERP Medical) 600,000    
Benefits to be paid in the aggregate for the following five years 7,900,000    
SERP Medical      
Defined Benefit Plan Disclosure      
Current accrued pension liability 100,000    
Long-term accrued pension liability 1,000,000    
Change in retirement benefit obligation $ 1,100,000 $ 1,100,000