Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - changes in benefit obligation, changes in plan assets, the funded status (Details)

v3.20.4
EMPLOYEE BENEFIT PLANS - changes in benefit obligation, changes in plan assets, the funded status (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Change in Projected Benefit Obligation:      
Actuarial Loss (Gain) $ 27,924 $ 7,642 $ 815
Defined benefit pension plan [Member]      
Change in Projected Benefit Obligation:      
Benefit Obligation at Beginning of Year 180,830 149,347 165,084
Service Cost 5,828 6,114 6,884
Interest Cost 5,612 6,178 5,661
Actuarial Loss (Gain) 32,172 25,715 (16,349)
Benefits Paid (11,677) (6,255) (11,686)
Expenses Paid (260) (269) (247)
Special/Contractual Termination Benefits 61 0 0
Projected Benefit Obligation at End of Year 212,566 180,830 149,347
Change in Plan Assets:      
Fair Value of Plan Assets at Beginning of Year 161,646 134,535 129,719
Actual Return (Loss) on Plan Assets 17,066 28,635 (6,251)
Employer Contributions 5,000 5,000 23,000
Benefits Paid (11,677) (6,255) (11,686)
Expenses Paid (260) (269) (247)
Fair Value of Plan Assets at End of Year 171,775 161,646 134,535
Funded Status of Plan and Accrued Liability Recognized at End of Year:      
Other Liabilities 40,791 19,184 14,812
Accumulated Benefit Obligation at End of Year 177,362 156,327 130,477
Components of Net Periodic Benefit Costs:      
Service Cost 5,828 6,114 6,884
Interest Cost 5,612 6,178 5,661
Expected Return on Plan Assets (10,993) (9,527) (9,564)
Amortization of Prior Service Costs 15 15 199
Special/Contractual Termination Benefits 61 0 0
Net Loss Amortization 3,933 3,862 3,673
Net Periodic Benefit Cost $ 4,456 $ 6,642 $ 6,853
Weighted-average assumptions used to determine benefit obligations:      
Discount Rate (in percent) 2.88% 3.53% 4.43%
Rate of Compensation Increase (in percent) 4.00% 4.00% 4.00%
Measurement Date Dec. 31, 2020 Dec. 31, 2019 Dec. 31, 2018
Weighted-Average Assumptions Used to Determine Benefit Cost:      
Discount Rate (in percent) 3.53% 4.43% 3.71%
Expected Return on Plan Assets (in percent) 7.00% 7.25% 7.25%
Rate of Compensation Increase (in percent) 4.00% 4.00% 3.25%
Amortization Amounts from Accumulated Other Comprehensive Income:      
Net Actuarial Loss (Gain) $ 26,098 $ 6,606 $ (533)
Prior Service Cost (15) (15) (199)
Net Loss (3,933) (3,862) (3,673)
Deferred Tax (Benefit) Expense (5,615) (694) 1,118
Other Comprehensive Loss (Gain), net of tax 16,535 2,035 (3,287)
Amounts Recognized in Accumulated Other Comprehensive Income:      
Net Actuarial Losses 59,400 37,235 34,491
Prior Service Cost 35 50 66
Deferred Tax Liability (Benefit) (15,066) (9,451) (8,757)
Accumulated Other Comprehensive Loss (Gain), net of tax $ 44,369 $ 27,834 $ 25,800