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Retirement Plans (Tables)
 12 Months Ended
Dec. 31, 2021
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
Net periodic benefit cost of these plans for the years ended December 31, was as follows:
202120202019
 (dollars in thousands)
Service cost$— $— $— 
Interest cost on projected benefit obligation23 23 34 
Amortization of transition obligation— — — 
Amortization of prior service cost76 — — 
Gain amortization(27)(52)(60)
Net periodic benefit cost$72 $(29)$(26)
Schedule of Changes in Benefit Obligations and Plan Assets
The following table sets forth the change in the benefit obligation and plan assets as of December 31:
20212020
 (dollars in thousands)
Change in Benefit Obligation
Benefit obligation at beginning of year$1,372 $834 
Service cost— — 
Interest cost23 23 
Amendments— 537 
Actuarial gain(302)102 
Net benefits paid(107)(124)
Benefit obligation at end of year986 1,372 
Change in Plan Assets
Fair value of plan assets at beginning of year— — 
Actual return on plan assets— — 
Employer contributions107 124 
Net benefits paid(107)(124)
Fair value of plan assets at end of year— — 
Funded Status at End of Year986 1,372 
Unrecognized prior service cost(461)(537)
Unrecognized net gain584 308 
Amounts recognized in retained earnings$1,109 $1,143 
Schedule of Amounts Recognized as Other Liabilities
As of December 31, the funded status of the plan is:
20212020
 (dollars in thousands)
Amounts Recognized in the Statement of Financial Condition as Other liabilities$986 $1,372 
Schedule of Amounts Recognized in Accumulated Other Comprehensive Income
The following table identifies the related tax effects allocated to each component of other comprehensive income in the Consolidated Statements of Comprehensive Income as of December 31. Reclassification adjustments related to securities available for sale are included in the “Net securities gains” line in the Consolidated Statements of Income.
202120202019
Pretax AmountTax (Expense) BenefitNet of Tax AmountPretax AmountTax (Expense) BenefitNet of Tax AmountPretax AmountTax (Expense) BenefitNet of Tax Amount
(dollars in thousands)
Unrealized gains (losses) on securities:
Unrealized holding (losses) gains on securities arising during the period$(29,892)$6,278 $(23,614)$19,981 $(4,196)$15,785 $20,625 $(4,331)$16,294 
Reclassification adjustment for gains on securities included in net income(16)3 (13)(70)15 (55)(22)5 (17)
Total unrealized (losses) gains on securities(29,908)6,281 (23,627)19,911 (4,181)15,730 20,603 (4,326)16,277 
Unrealized gains (losses) on derivatives:
Unrealized holding (losses) gains on derivatives arising during the period(3,356)705 (2,651)(4,467)938 (3,529)935 (196)739 
Total unrealized (losses) gains on derivatives(3,356)705 (2,651)(4,467)938 (3,529)935 (196)739 
Unrealized gains (losses) for postretirement obligations:
Prior service cost76 (16)60 (537)113 (424)— — — 
Net gain (loss)275 (58)217 (155)32 (123)(121)25 (96)
Total unrealized gains (losses) for postretirement obligations351 (74)277 (692)145 (547)(121)25 (96)
Total other comprehensive (loss) income$(32,913)$6,912 $(26,001)$14,752 $(3,098)$11,654 $21,417 $(4,497)$16,920 
The following table sets forth the amounts recognized in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit costs as of December 31:
202120202019
 (dollars in thousands)
Amounts recognized in accumulated other comprehensive income, net of tax:
Net (gain) loss$(461)$(243)$(366)
Prior service cost364 424 — 
Total$(97)$181 $(366)
Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligation
Weighted-average assumptions used to determine the benefit obligation as of December 31 are as follows:
202120202019
Weighted-Average Assumptions
Discount rate2.38 %1.83 %2.88 %
Health care cost trend: Initial5.90 %5.95 %5.55 %
Health care cost trend: Ultimate4.75 %4.75 %4.75 %
Year ultimate reached202720262025
Schedule of Weighted-Average Assumptions Used to Determine Net Periodic Cost
Weighted-average assumptions used to determine the benefit obligation as of December 31 are as follows:
202120202019
Weighted-Average Assumptions
Discount rate2.38 %1.83 %2.88 %
Health care cost trend: Initial5.90 %5.95 %5.55 %
Health care cost trend: Ultimate4.75 %4.75 %4.75 %
Year ultimate reached202720262025
Weighted-average assumptions used to determine the net benefit costs as of December 31 are as follows: 
202120202019
Weighted-Average Assumptions for Net Periodic Cost
Discount rate1.83 %2.88 %4.11 %
Health care cost trend: Initial5.95 %5.55 %6.00 %
Health care cost trend: Ultimate4.75 %4.75 %4.75 %
Year ultimate reached202620252024
Corridor10.00 %10.00 %10.00 %
Recognition period for gains and losses10.410.912.1
Schedule of Projected Benefit Payments
As of December 31, 2021, the projected benefit payments for the next ten years are as follows:
Projected Benefit
        Payments         
 (dollars in thousands)
2022$118 
2023113 
2024107 
2025100 
202693 
2027 - 2031350 
Schedule of Amounts Recognized in Accumulated Other Comprehensive Income The estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost for 2022 are as follows (dollars in thousands):
 Postretirement
Benefits
 (dollars in thousands)
Net gain$(69)
Prior service cost76 
Total$7