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PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS
 9 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS
12. PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS

Defined Benefit Retirement Plan

The Central Pacific Bank had a defined benefit retirement plan that covered substantially all of its employees who were employed during the period that the plan was in effect. The plan was initially curtailed in 1986, and accordingly, plan benefits were fixed as of that date. Effective January 1, 1991, the bank reactivated its defined benefit retirement plan. As a result of the reactivation, employees for whom benefits were fixed in 1986 began to accrue additional benefits under a new formula that became effective January 1, 1991. Employees who were not participants at curtailment, but who were subsequently eligible to join, became participants effective January 1, 1991. Under the reactivated plan, benefits are based upon the employees' years of service and their highest average annual salaries in a 60-consecutive-month period of service, reduced by benefits provided from the bank's terminated money purchase pension plan. The reactivation of the defined benefit retirement plan resulted in an increase of $5.9 million in the unrecognized prior service cost, which was amortized over a period of 13 years. Effective December 31, 2002, the bank curtailed its defined benefit retirement plan, and accordingly, plan benefits were fixed as of that date.

In January 2021, the Board of Directors approved termination of, and authorized Company management to commence taking action to terminate, the defined benefit retirement plan. The Company received a favorable determination letter from the IRS and no objection from the Pension Benefit Guaranty Corporation on the Form 500 standard termination notice in January 2022. The Company completed the termination and settlement of the defined benefit retirement plan in the second quarter of 2022. Upon final plan termination and settlement, the Company recognized a one-time noncash settlement charge of $4.9 million which was recorded in other operating expense. As of September 30, 2022, the Company has no further defined benefit retirement plan liability or ongoing pension expense recognition.

The following table sets forth the components of net periodic benefit cost for the defined benefit retirement plan for the periods indicated:
Three Months Ended
September 30,		Nine Months Ended
September 30,
(dollars in thousands)2022202120222021
Interest cost$— $121 $212 $363 
Expected return on plan assets— (137)(207)(411)
Amortization of net actuarial loss— 175 224 526 
Settlement— — 4,884 — 
Net periodic benefit cost$— $159 $5,113 $478 

Supplemental Executive Retirement Plans

In 1995, 2001, 2004 and 2006, our bank also established Supplemental Executive Retirement Plans ("SERPs"), which provide certain (current and former) officers of our bank with supplemental retirement benefits. On December 31, 2002, the 1995 and 2001 SERP were curtailed.
The following table sets forth the components of net periodic benefit cost for the SERPs for the periods indicated:
Three Months Ended
September 30,		Nine Months Ended
September 30,
(dollars in thousands)2022202120222021
Interest cost$75 $65 $225 $197 
Amortization of net actuarial loss20 84 62 251 
Amortization of net transition obligation5 5 13 14 
Net periodic benefit cost$100 $154 $300 $462 

All components of net periodic benefit cost are included in other operating expenses in the Company's consolidated statements of income.