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Employee Benefit Plans, Defined Benefit Post-Retirement Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined benefit plan disclosure [Abstract]      
Transition obligation period of recognition 20 years    
Assumptions used to determine benefit obligations [Abstract]      
Expected long-term return on plan assets 6.70% 6.70% 6.70%
Rate of compensation increase 3.00% 3.00% 3.00%
Interest rate of credit for cash balance plan 4.66% 3.99% 1.94%
Assumptions used to determine net periodic pension cost [Abstract]      
Expected long-term return on plan assets 6.70% 6.70% 7.00%
Rate of compensation increase 3.00% 3.00% 3.00%
Interest rate of credit for cash balance plan 3.99% 1.94% 1.62%
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss $ (3,296) $ 14,292 $ (3,780)
Amortization of unrecognized net (loss) gain $ 824 $ (3,573) $ 945
Estimate future benefit payments [Abstract]      
Ultimate health care cost trend rate 4.00%    
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 100.00% 100.00%  
Minimum [Member]      
Assumptions used to determine benefit obligations [Abstract]      
Discount rate 4.91% 5.54% 3.23%
Assumptions used to determine net periodic pension cost [Abstract]      
Discount rate 3.35% 3.23% 3.08%
Estimate future benefit payments [Abstract]      
Annual rates of increase in the per capita cost of covered medical and prescription drug benefits, 4.50%    
Maximum [Member]      
Assumptions used to determine benefit obligations [Abstract]      
Discount rate 5.66% 5.66% 3.35%
Assumptions used to determine net periodic pension cost [Abstract]      
Discount rate 5.66% 3.35% 3.25%
Estimate future benefit payments [Abstract]      
Annual rates of increase in the per capita cost of covered medical and prescription drug benefits, 6.50%    
Pension Benefits [Member]      
Accumulated other comprehensive income (loss), before tax [Abstract]      
Net actuarial loss (gain) $ 29,301 $ 35,971  
Prior service cost (credit) 198 211  
Total amounts recognized in AOCI (pre-tax) 29,499 36,182  
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 75,940 88,919  
Service cost 1,904 2,024 $ 2,069
Interest cost 4,002 2,765 2,717
Plan participants' contributions 0 0  
Actuarial loss (gain) 1,387 (11,158)  
Amendments 30 0  
Benefits paid (6,269) (6,610)  
Projected benefit obligation at end of year 76,994 75,940 88,919
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 113,316 135,867  
Gain (loss) on plan assets 12,803 (17,260)  
Employer contributions 1,319 1,319  
Plan participants' contributions 0 0  
Benefits paid (6,269) (6,610)  
Fair value of plan assets at end of year 121,169 113,316 135,867
Funded (unfunded) status at year end 44,175 37,376  
Accumulated benefit obligation 77,000 75,900  
Amounts recognized in Balance Sheet [Abstract]      
Funded (unfunded) status at year end 44,175 37,376  
Components of net periodic (benefit) cost [Abstract]      
Service cost 1,904 2,024 2,069
Interest cost 4,002 2,765 2,717
Expected return on plan assets (7,379) (8,884) (8,786)
Amortization of prior service cost (credit) 43 108 59
Amortization of unrecognized net loss (gain) 2,633 623 1,263
Net periodic pension cost (benefit) 1,203 (3,364) (2,678)
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss (4,037) 14,987 (3,237)
Prior service cost 30 0 0
Amortization of prior service cost (credit) (43) (108) (59)
Amortization of unrecognized net (loss) gain (2,633) (623) (1,263)
Total recognized in OCI (6,683) 14,256 (4,559)
Total recognized in net periodic (benefit) cost and OCI, pre-tax (5,480) 10,892 (7,237)
Estimate future benefit payments [Abstract]      
2024 7,676    
2025 7,249    
2026 7,269    
2027 7,759    
2028 7,382    
2029 - 2033 33,035    
Employer voluntary contribution to plan 0 0  
Pension Benefits [Member] | Other Assets [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Assets recognized 59,889 53,031  
Pension Benefits [Member] | Other Liabilities [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Liabilities recognized $ (15,714) $ (15,655)  
Pension Benefits [Member] | Cash and Cash Equivalents [Member]      
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 2.00% 3.00%  
Pension Benefits [Member] | Cash and Cash Equivalents [Member] | Minimum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 0.00%    
Pension Benefits [Member] | Cash and Cash Equivalents [Member] | Maximum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 15.00%    
Pension Benefits [Member] | Fixed Income Securities [Member]      
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 38.00% 38.00%  
Pension Benefits [Member] | Fixed Income Securities [Member] | Minimum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 30.00%    
Pension Benefits [Member] | Fixed Income Securities [Member] | Maximum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 60.00%    
Pension Benefits [Member] | Equities [Member]      
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 60.00% 59.00%  
Pension Benefits [Member] | Equities [Member] | Minimum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 40.00%    
Pension Benefits [Member] | Equities [Member] | Maximum [Member]      
Target asset allocations [Abstract]      
Target allocation percentage of assets 70.00%    
Other Benefits [Member]      
Accumulated other comprehensive income (loss), before tax [Abstract]      
Net actuarial loss (gain) $ (178) $ (921)  
Prior service cost (credit) (10) (14)  
Total amounts recognized in AOCI (pre-tax) (188) (935)  
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 4,183 5,152  
Service cost 4 7 8
Interest cost 240 170 163
Plan participants' contributions 141 147  
Actuarial loss (gain) 710 (695)  
Amendments 0 0  
Benefits paid (563) (598)  
Projected benefit obligation at end of year 4,715 4,183 5,152
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Gain (loss) on plan assets 0 0  
Employer contributions 422 451  
Plan participants' contributions 141 147  
Benefits paid (563) (598)  
Fair value of plan assets at end of year 0 0 0
Funded (unfunded) status at year end (4,715) (4,183)  
Accumulated benefit obligation 4,700 4,200  
Amounts recognized in Balance Sheet [Abstract]      
Funded (unfunded) status at year end (4,715) (4,183)  
Components of net periodic (benefit) cost [Abstract]      
Service cost 4 7 8
Interest cost 240 170 163
Expected return on plan assets 0 0 0
Amortization of prior service cost (credit) (4) 6 51
Amortization of unrecognized net loss (gain) (32) 0 0
Net periodic pension cost (benefit) 208 183 222
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss 711 (695) (543)
Prior service cost 0 0 0
Amortization of prior service cost (credit) 4 (6) (51)
Amortization of unrecognized net (loss) gain 32 0 0
Total recognized in OCI 747 (701) (594)
Total recognized in net periodic (benefit) cost and OCI, pre-tax 955 (518) $ (372)
Estimate future benefit payments [Abstract]      
2024 444    
2025 444    
2026 442    
2027 422    
2028 414    
2029 - 2033 1,860    
Employer voluntary contribution to plan 0 0  
Other Benefits [Member] | Other Assets [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Assets recognized 0 0  
Other Benefits [Member] | Other Liabilities [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Liabilities recognized $ (4,715) $ (4,183)