XML 83 R84.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Employee Benefit Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
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 7.00% 7.00% 7.00%
Rate of compensation increase 3.00% 3.00% 3.00%
Assumptions used to determine net periodic pension cost [Abstract]      
Expected long-term return on plan assets 7.00% 7.00% 7.00%
Rate of compensation increase 3.00% 3.00% 3.00%
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss $ (5,331) $ 12,457 $ (2,401)
Amortization of unrecognized net (loss) 1,333 $ (3,038) $ 570
Net actuarial loss and prior service costs that will be amortized from Accumulated other comprehensive income (loss) in next fiscal year $ 1,600    
Estimate future benefit payments [Abstract]      
Ultimate health care cost trend rate 3.80%    
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]      
One-percentage point increase on total service and interest cost components $ 29    
One-percentage point (decrease) on total service and interest cost components (25)    
One-percentage point increase on post-retirement accumulated benefit obligation 628    
One-percentage point (decrease) on post-retirement accumulated benefit obligation $ (543)    
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 100.00% 100.00%  
Minimum [Member]      
Assumptions used to determine benefit obligations [Abstract]      
Discount rate 3.69% 4.79% 4.20%
Assumptions used to determine net periodic pension cost [Abstract]      
Discount rate 4.79% 4.20% 4.76%
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 3.73% 4.80% 4.21%
Assumptions used to determine net periodic pension cost [Abstract]      
Discount rate 4.80% 4.21% 4.84%
Estimate future benefit payments [Abstract]      
Annual rates of increase in the per capita cost of covered medical and prescription drug benefits, 7.00%    
Pension Benefits [Member]      
Accumulated other comprehensive income (loss), before tax [Abstract]      
Net actuarial loss $ 28,334 $ 35,538  
Prior service cost 491 570  
Total amounts recognized in AOCI (pre-tax) 28,825 36,108  
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 85,134 90,950  
Service cost 1,723 1,659 $ 1,511
Interest cost 3,942 3,645 4,168
Plan participants' contributions 0 0  
Actuarial loss (gain) 6,030 (3,977)  
Amendments 0 337  
Benefits paid (6,243) (7,480)  
Projected benefit obligation at end of year 90,586 85,134 90,950
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 109,746 124,226  
Actual return on plan assets 18,120 (8,381)  
Employer contributions 1,372 1,381  
Plan participants' contributions 0 0  
Benefits paid (6,243) (7,480)  
Fair value of plan assets at end of year 122,995 109,746 124,226
Funded (unfunded) status at year end 32,409 24,612  
Accumulated benefit obligation 90,600 85,100  
Amounts recognized in Balance Sheet [Abstract]      
Funded (unfunded) status at year end 32,409 24,612  
Components of net periodic cost (benefit) [Abstract]      
Service cost 1,723 1,659 1,511
Interest cost 3,942 3,645 4,168
Expected return on plan assets (7,480) (8,478) (7,929)
Amortization of prior service cost 43 40 46
Amortization of unrecognized net loss 2,593 930 1,668
Net periodic pension cost (benefit) 821 (2,204) (536)
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss (4,611) 12,882 (3,075)
Prior service cost 0 337 0
Amortization of prior service (cost) (43) (40) (46)
Amortization of unrecognized net (loss) (2,593) (930) (1,668)
Total recognized in OCI (7,247) 12,249 (4,789)
Total recognized in net periodic benefit cost and OCI pre-tax (6,426) 10,045 (5,325)
Estimate future benefit payments [Abstract]      
2020 6,916    
2021 6,722    
2022 6,722    
2023 6,582    
2024 7,827    
2025 - 2029 35,215    
Employer voluntary contribution to plan 0 0  
Pension Benefits [Member] | Other Assets [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Assets recognized 51,988 42,900  
Pension Benefits [Member] | Other Liabilities [Member]      
Amounts recognized in Balance Sheet [Abstract]      
Liabilities recognized $ (19,579) $ (18,288)  
Pension Benefits [Member] | Cash and Cash Equivalents [Member]      
Actual plan asset allocations [Abstract]      
Actual plan asset allocations 3.00% 4.00%  
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 40.00% 39.00%  
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 57.00% 57.00%  
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 $ 125 $ 844  
Prior service cost 94 145  
Total amounts recognized in AOCI (pre-tax) 219 989  
Change in benefit obligation [Roll Forward]      
Benefit obligation at beginning of year 7,034 8,050  
Service cost 7 10 12
Interest cost 272 327 357
Plan participants' contributions 201 209  
Actuarial loss (gain) (719) (762)  
Amendments 0 0  
Benefits paid (712) (800)  
Projected benefit obligation at end of year 6,083 7,034 8,050
Change in plan assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 511 591  
Plan participants' contributions 201 209  
Benefits paid (712) (800)  
Fair value of plan assets at end of year 0 0 0
Funded (unfunded) status at year end (6,083) (7,034)  
Accumulated benefit obligation 6,100 7,000  
Amounts recognized in Balance Sheet [Abstract]      
Funded (unfunded) status at year end (6,083) (7,034)  
Components of net periodic cost (benefit) [Abstract]      
Service cost 7 10 12
Interest cost 272 327 357
Expected return on plan assets 0 0 0
Amortization of prior service cost 50 51 51
Amortization of unrecognized net loss 0 124 87
Net periodic pension cost (benefit) 329 512 507
Other changes in plan assets and benefit obligation recognized in OCI (pre-tax) [Abstract]      
Net (gain) loss (720) (762) 388
Prior service cost 0 0 286
Amortization of prior service (cost) (50) (51) (51)
Amortization of unrecognized net (loss) 0 (124) (87)
Total recognized in OCI (770) (937) 536
Total recognized in net periodic benefit cost and OCI pre-tax (441) (425) $ 1,043
Estimate future benefit payments [Abstract]      
2020 497    
2021 464    
2022 462    
2023 457    
2024 451    
2025 - 2029 2,070    
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 $ (6,083) $ (7,034)