v3.25.2
Components of Net Periodic Benefit Cost (Tables)
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Net periodic (income) benefit cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the three and six months ended June 30, 2025 and 2024, includes the following components:

 For the Three Months Ended June 30,
Pension PlanRIM PlanPost-retirement PlanSplit-Dollar Life Insurance
20252024202520242025202420252024 Affected Line Item in the Consolidated Statements of Income
(In thousands)
Service cost$1,017 $1,212 $52 $61 $51 $54 $57 $57 Compensation and employee benefits
Interest cost3,294 3,100 169 162 287 248 216 208 Other non-interest expense
Expected return on plan assets(8,607)(8,119)— — — — — — Other non-interest expense
Amortization:
Prior service cost— — — — — — 13 14 Other non-interest expense
Net loss— 512 — 28 — — (22)— Other non-interest expense
Net periodic (income) benefit cost$(4,296)$(3,295)$221 $251 $338 $302 $264 $279 
13.    Components of Net Periodic Benefit Cost (continued)

For the Six Months Ended June 30,
Pension PlanRIM PlanPost-retirement PlanSplit-Dollar Life Insurance
20252024202520242025202420252024Affected Line Item in the Consolidated Statements of Income
(In thousands)
Service cost$2,034 $2,424 $104 $122 $102 $108 $114 $114 Compensation and employee benefits
Interest cost6,587 6,200 338 324 574 496 432 416 Other non-interest expense
Expected return on plan assets(17,214)(16,239)— — — — — — Other non-interest expense
Amortization:
Prior service cost— — — — — — 26 28 Other non-interest expense
Net loss— 1,024 — 56 — — (44)— Other non-interest expense
Net periodic (income) benefit cost$(8,593)$(6,591)$442 $502 $676 $604 $528 $558