Annual report pursuant to Section 13 and 15(d)

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

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EMPLOYEE BENEFIT PLANS - Changes in benefit obligation, changes in plan assets, the funded status (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in Projected Benefit Obligation:      
Actuarial (Gain) Loss $ (31,339) $ 27,924 $ 7,642
Components of Net Periodic Benefit Costs:      
Defined benefit plan settlement 3,072 0 0
Defined benefit pension plan [Member]      
Change in Projected Benefit Obligation:      
Benefit Obligation at Beginning of Year 212,566 180,830 149,347
Service Cost 6,971 5,828 6,114
Interest Cost 4,885 5,612 6,178
Actuarial (Gain) Loss (14,934) 32,172 25,715
Benefits Paid (2,087) (11,677) (6,255)
Expenses Paid (259) (260) (269)
Settlements (34,634) 0 0
Special/Contractual Termination Benefits 0 61 0
Projected Benefit Obligation at End of Year 172,508 212,566 180,830
Change in Plan Assets:      
Fair Value of Plan Assets at Beginning of Year 171,775 161,646 134,535
Actual Return (Loss) on Plan Assets 30,479 17,066 28,635
Employer Contributions 0 5,000 5,000
Benefits Paid (2,087) (11,677) (6,255)
Expenses Paid (259) (260) (269)
Settlements (34,634) 0 0
Fair Value of Plan Assets at End of Year 165,274 171,775 161,646
Funded Status of Plan and Accrued Liability Recognized at End of Year:      
Other Liabilities 7,234 40,791 19,184
Accumulated Benefit Obligation at End of Year 149,569 177,362 156,327
Components of Net Periodic Benefit Costs:      
Service Cost 6,971 5,828 6,114
Interest Cost 4,885 5,612 6,178
Expected Return on Plan Assets (11,147) (10,993) (9,527)
Amortization of Prior Service Costs 15 15 15
Special/Contractual Termination Benefits 0 61 0
Net Loss Amortization 6,764 3,933 3,862
Defined benefit plan settlement 3,072 0 0
Net Periodic Benefit Cost $ 10,560 $ 4,456 $ 6,642
Weighted-average assumptions used to determine benefit obligations:      
Discount Rate (in percent) 3.11% 2.88% 3.53%
Rate of Compensation Increase (in percent) 4.40% 4.00% 4.00%
Measurement Date Dec. 31, 2021 Dec. 31, 2020 Dec. 31, 2019
Weighted-Average Assumptions Used to Determine Benefit Cost:      
Discount Rate (in percent) 2.88% 3.53% 4.43%
Expected Return on Plan Assets (in percent) 6.75% 7.00% 7.25%
Rate of Compensation Increase (in percent) 4.00% 4.00% 4.00%
Amortization Amounts from Accumulated Other Comprehensive Income:      
Net Actuarial Loss (Gain) $ (34,265) $ 26,098 $ 6,606
Prior Service Cost (15) (15) (15)
Net Loss (9,836) (3,933) (3,862)
Deferred Tax (Benefit) Expense 11,183 (5,615) (694)
Other Comprehensive Loss (Gain), net of tax (32,933) 16,535 2,035
Amounts Recognized in Accumulated Other Comprehensive Income:      
Net Actuarial Losses 15,300 59,400 37,235
Prior Service Cost 20 35 50
Deferred Tax Benefit (3,884) (15,066) (9,451)
Accumulated Other Comprehensive Loss, net of tax $ 11,436 $ 44,369 $ 27,834