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PENSION PLANS | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
PENSION PLANS | 17. PENSION PLANS Defined Benefit Retirement Plan The bank has 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 December 2016, the Company purchased non-participating annuity contracts totaling $9.4 million to settle the pension obligation for a portion of the Company's plan participants. The purchase of the annuity contracts were settled by using plan assets. As a result of the settlement, we recognized a pro-rata net actuarial loss of $3.8 million in pension expense and other comprehensive income. The following tables set forth information pertaining to the defined benefit retirement plan:
| Year Ended December 31,
| 2017 |  | 2016
| (Dollars in thousands)
Change in benefit obligation: |  |  |  |  |
Benefit obligation at beginning of year | $ | 23,677 |  |  | $ | 33,067 |
Interest cost | 926 |  |  | 1,374 |
Actuarial (gains) losses | 752 |  |  | 1,039 |
Benefits paid | (1,884 | ) |  | (2,413 | )
Annuity purchase | — |  |  | (9,390 | )
Benefit obligation at end of the year | 23,471 |  |  | 23,677 |
Change in plan assets, at fair value: |  |  |  |  |
Fair value of plan assets at beginning of year | 18,539 |  |  | 26,321 |
Actual return on plan assets | 2,177 |  |  | 1,021 |
Employer contributions | 4,000 |  |  | 3,000 |
Benefits paid | (1,884 | ) |  | (2,413 | )
Annuity purchase | — |  |  | (9,390 | )
Fair value of plan assets at end of year | 22,832 |  |  | 18,539 |
Funded status at end of year | $ | (639 | ) |  | $ | (5,138 | )
Amounts recognized in AOCI: |  |  |  |  |
Net actuarial losses | $ | (8,472 | ) |  | $ | (10,052 | )
Benefit obligation actuarial assumptions: |  |  |  |  |
Weighted average discount rate | 3.6 | % |  | 4.1 | %
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (Dollars in thousands)
Components of net periodic benefit cost: |  |  |  |  |  |  |  |
Interest cost | $ | 926 |  |  | $ | 1,374 |  |  | $ | 1,383 |
Expected return on plan assets | (1,036 | ) |  | (1,542 | ) |  | (1,893 | )
Amortization of net actuarial losses | 1,191 |  |  | 1,548 |  |  | 1,577 |
Settlement | — |  |  | 3,847 |  |  | — |
Net periodic benefit cost | $ | 1,081 |  |  | $ | 5,227 |  |  | $ | 1,067 |
Net periodic cost actuarial assumptions: |  |  |  |  |  |  |  |
Weighted average discount rate | 4.1 | % |  | 4.3 | % |  | 4.0 | %
Expected long-term rate of return on plan assets | 5.5 | % |  | 6.0 | % |  | 7.0 | %
The unrecognized net actuarial losses included in AOCI expected to be recognized in net periodic benefit cost during 2018 is approximately $1.0 million. The long-term rate of return on plan assets reflects the weighted-average long-term rates of return for the various categories of investments held in the plan. The expected long-term rate of return is adjusted when there are fundamental changes in expected returns on the plan investments. The defined benefit retirement plan assets consist primarily of equity and debt securities. Our asset allocations by asset category were as follows:
| December 31,
| 2017 |  | 2016
Equity securities | 53.9 | % |  | 50.6 | %
Debt securities | 42.3 |  |  | 34.0 |
Other | 3.8 |  |  | 15.4 |
Total | 100.0 | % |  | 100.0 | %
Equity securities included the Company's common stock in the amount of $0.1 million at December 31, 2017 and 2016. Our investment strategy for the defined benefit retirement plan is to maximize the long-term rate of return on plan assets while maintaining an acceptable level of risk. The investment policy establishes a target allocation for each asset class that is reviewed periodically and rebalanced when considered appropriate. The fair values of the defined benefit retirement plan as of December 31, 2017 and 2016 by asset category were as follows:
| Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
| (Dollars in thousands)
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |
Money market accounts | $ | 858 |  |  | $ | — |  |  | $ | — |  |  | $ | 858 |
Mutual funds | 12,258 |  |  | — |  |  | — |  |  | 12,258 |
Government obligations | — |  |  | 1,942 |  |  | — |  |  | 1,942 |
Common stocks | 5,509 |  |  | — |  |  | — |  |  | 5,509 |
Preferred stocks | 176 |  |  | — |  |  | — |  |  | 176 |
Corporate bonds and debentures | — |  |  | 2,089 |  |  | — |  |  | 2,089 |
Total | $ | 18,801 |  |  | $ | 4,031 |  |  | $ | — |  |  | $ | 22,832 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
| (Dollars in thousands)
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
Money market accounts | $ | 2,852 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,852 |
Mutual funds | 7,250 |  |  | — |  |  | — |  |  | 7,250 |
Government obligations | — |  |  | 2,134 |  |  | — |  |  | 2,134 |
Common stocks | 4,474 |  |  | — |  |  | — |  |  | 4,474 |
Preferred stocks | 130 |  |  | — |  |  | — |  |  | 130 |
Corporate bonds and debentures | — |  |  | 1,699 |  |  | — |  |  | 1,699 |
Total | $ | 14,706 |  |  | $ | 3,833 |  |  | $ | — |  |  | $ | 18,539 |
We are not required by funding regulations or laws to make any contributions to our defined benefit retirement plan in 2018. Estimated future benefit payments in each of the next five years and in the aggregate for the five years thereafter are as follows (in thousands):
Year Ending December 31: |
2018 | $ | 1,852 |
2019 | 1,819 |
2020 | 1,777 |
2021 | 1,737 |
2022 | 1,672 |
2023-2027 | 7,460 |
Total | $ | 16,317 |
Supplemental Executive Retirement Plans In 1995, 2001, 2004 and 2006, our bank established Supplemental Executive Retirement Plans ("SERP") that provide certain officers of the Company with supplemental retirement benefits. On December 31, 2002, the 1995 and 2001 SERP were curtailed. In conjunction with the merger with CB Bancshares, Inc. ("CBBI"), we assumed CBBI's SERP obligation. In the second quarter of 2017, the Company settled a portion of the SERP obligation of a former executive. As a result of the settlement, the Company remeasured the related SERP obligation and net periodic benefit cost and recognized a pro-rata net actuarial loss of $0.1 million in SERP expense and other comprehensive income. The following tables set forth information pertaining to the SERP:
| Year Ended December 31,
| 2017 |  | 2016
| (Dollars in thousands)
Change in benefit obligation |  |  |  |  |
Benefit obligation at beginning of year | $ | 10,292 |  |  | $ | 10,651 |
Interest cost | 429 |  |  | 465 |
Actuarial (gains) losses | 1,708 |  |  | (598 | )
Benefits paid | (1,210 | ) |  | (226 | )
Benefit obligation at end of year | 11,219 |  |  | 10,292 |
Change in plan assets |  |  |  |  |
Fair value of plan assets at beginning of year | — |  |  | — |
Employer contributions | 1,209 |  |  | 226 |
Benefits paid | (1,209 | ) |  | (226 | )
Fair value of plan assets at end of year | — |  |  | — |
Funded status at end of year | $ | (11,219 | ) |  | $ | (10,292 | )
Amounts recognized in AOCI |  |  |  |
Net transition obligation | $ | (100 | ) |  | $ | (112 | )
Prior service cost | (49 | ) |  | (66 | )
Net actuarial losses | (2,163 | ) |  | (701 | )
Total amounts recognized in AOCI | $ | (2,312 | ) |  | $ | (879 | )
Benefit obligation actuarial assumptions |  |  |  |  |
Weighted average discount rate | 3.5 | % |  | 4.1 | %
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (Dollars in thousands)
Components of net periodic benefit cost |  |  |  |  |  |  |  |
Interest cost | $ | 429 |  |  | $ | 465 |  |  | $ | 440 |
Amortization of net actuarial (gains) losses | 102 |  |  | 51 |  |  | 111 |
Amortization of net transition obligation | 18 |  |  | 17 |  |  | 16 |
Amortization of prior service cost | 18 |  |  | 18 |  |  | 18 |
Settlement | 138 |  |  | — |  |  | — |
Net periodic benefit cost | $ | 705 |  |  | $ | 551 |  |  | $ | 585 |
Net periodic cost actuarial assumptions |  |  |  |  |  |  |  |
Weighted average discount rate | 4.1 | % |  | 4.4 | % |  | 4.1 | %
The estimated amortization of components included in AOCI that will be recognized into net periodic benefit cost for 2018 is as follows (in thousands):
Amortization of net actuarial losses | $ | 102 |
Amortization of net transition obligation | 18 |
Amortization of prior service cost | 18 |
The SERP holds no plan assets other than employer contributions that are paid as benefits during the year. We expect to contribute $0.4 million to the SERP in 2018. Estimated future benefit payments reflecting expected future service for the SERP in each of the next five years and in the aggregate for the five years thereafter are as follows (in thousands):
Year Ending December 31: |
2018 | $ | 351 |
2019 | 347 |
2020 | 340 |
2021 | 325 |
2022 | 316 |
2023-2027 | 3,212 |
Total | $ | 4,891 |

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