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Pension and Postretirement Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Schedule of Assumptions Used Actuarial Assumptions used to determine benefit obligations as of December 31 of the years indicated:
 SERP I and SERP IIPRBP
 2020201920202019
Discount rate2.00 %2.80 %0.95 %2.20 %
Rate of increase for future compensationN/AN/AN/AN/A
Expected long-term rate of return on plan assetsN/AN/AN/AN/A
 For the Year Ended December 31,
Discount Rate Used in the Calculation of Periodic Pension Costs202020192018
SERP I and SERP II2.80 %3.95 %3.30 %
PRBP2.20 %3.45 %2.75 %
Schedule of Defined Benefit Plans Disclosures Changes in Benefit Obligations and Plan Assets: 
 SERP I & SERP IIPRBP
(dollars in thousands)2020201920202019
Change in benefit obligations
Benefit obligation at January 1
$5,158 $4,687 $235 $241 
Service cost— — — — 
Interest cost140 179 
Plan participants contribution— — 36 38 
Actuarial loss439 595 40 
Settlements— — — — 
Benefits paid(347)(303)(80)(92)
Benefit obligation at December 31
$5,390 $5,158 $200 $235 
Change in plan assets
Fair value of plan assets at January 1
$— $— $— $— 
Actual return on plan assets— — — — 
Settlements— — — — 
Excess assets transferred to defined contribution plan— — — — 
Employer contribution347 303 44 54 
Plan participants’ contribution— — 36 38 
Benefits paid(347)(303)(80)(92)
Fair value of plan assets at December 31
$— $— $— $— 
Funded status at year end (plan assets less benefit obligations)$(5,390)$(5,158)$(200)$(235)
 
 For the Year Ended December 31,
 SERP I & SERP IIPRBP
Amounts included in the Consolidated Balance Sheet as Other liabilities and accumulated other comprehensive income including the following:2020201920202019
Accrued liability$(2,998)$(3,112)$(84)$(99)
Net actuarial loss(2,392)(2,046)(116)(136)
Prior service cost— — — — 
Unrecognized net initial obligation— — — — 
Net included in Other liabilities in the Consolidated Balance Sheets$(5,390)$(5,158)$(200)$(235)
Schedule of Net Benefit Costs The following tables provide the components of net periodic pension costs for the periods indicated:
SERP I and SERP II Periodic Pension CostFor the Year Ended December 31,
(dollars in thousands)202020192018
Service cost$— $— $— 
Interest cost140 179 160 
Amortization of prior service cost— — — 
Recognition of net actuarial loss94 62 70 
Net periodic pension cost$234 $241 $230 
 
PRBP Net Periodic Pension Cost
For the Year Ended December 31,
(dollars in thousands)202020192018
Service cost$— $— $— 
Interest cost
Amortization of prior service cost— — — 
Recognition of net actuarial loss24 17 30 
Net periodic pension cost$29 $25 $39 
Schedule of Expected Benefit Payments
The following benefit payments, which reflect expected future service, are expected to be paid over the next ten years:
 
(dollars in thousands)SERP I & SERP IIPRBP
Fiscal year ending  
2021$342 $43 
2022338 35 
2023346 29 
2024354 24 
2025347 19 
2026 - 20301,565 46