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EMPLOYEE BENEFIT PLANS (Tables)
12 Months Ended
Dec. 31, 2019
Compensation and Retirement Disclosure [Abstract]  
Schedule of components of pension expense, the funded status of the plan, amounts recognized in the consolidated statements of financial condition, and major assumptions
(Dollars in Thousands)201920182017
Change in Projected Benefit Obligation:
Benefit Obligation at Beginning of Year$149,347$165,084$152,585
Service Cost6,1146,8846,752
Interest Cost6,1785,6615,750
Actuarial Loss (Gain) 25,715(16,349)10,877
Benefits Paid(6,255)(11,686)(10,541)
Expenses Paid(269)(247)(339)
Projected Benefit Obligation at End of Year$180,830$149,347$165,084
Change in Plan Assets:
Fair Value of Plan Assets at Beginning of Year$134,535$129,719$113,813
Actual Return (Loss) on Plan Assets28,635(6,251)16,786
Employer Contributions5,00023,00010,000
Benefits Paid(6,255)(11,686)(10,541)
Expenses Paid(269)(247)(339)
Fair Value of Plan Assets at End of Year$161,646$134,535$129,719
Funded Status of Plan and Accrued Liability Recognized at End of Year:
Other Liabilities$19,184$14,812$35,365
Accumulated Benefit Obligation at End of Year$156,327$130,477$144,139
Components of Net Periodic Benefit Costs:
Service Cost$6,114$6,884$6,752
Interest Cost6,1785,6615,750
Expected Return on Plan Assets(9,527)(9,564)(8,026)
Amortization of Prior Service Costs15199223
Net Loss Amortization3,8623,6733,812
Net Periodic Benefit Cost$6,642$6,853$8,511
Weighted-Average Assumptions Used to Determine Benefit Obligation:
Discount Rate3.53%4.43%3.71%
Rate of Compensation Increase(1)4.00%4.00%3.25%
Measurement Date12/31/1912/31/1812/31/17
Weighted-Average Assumptions Used to Determine Benefit Cost:
Discount Rate4.43%3.71%4.21%
Expected Return on Plan Assets7.25%7.25%7.25%
Rate of Compensation Increase(1)4.00%3.25%3.25%
Amortization Amounts from Accumulated Other Comprehensive Income:
Net Actuarial Loss (Gain) $6,606$(533)$2,117
Prior Service Cost(15)(199)(223)
Net Loss(3,862)(3,673)(3,812)
Deferred Tax (Benefit) Expense (694)1,1185,898
Other Comprehensive Loss (Gain), net of tax$2,035$(3,287)$3,980
Amounts Recognized in Accumulated Other Comprehensive Income:
Net Actuarial Losses$37,235$34,491$38,698
Prior Service Cost5066265
Deferred Tax Benefit(9,451)(8,757)(9,876)
Accumulated Other Comprehensive Loss, net of tax$27,834$25,800$29,087
(1) Effective 12/31/18, the Company utilized an age-graded approach that varies the rate based on the age of the participants.
Schedule of pension plan asset allocation and the target asset allocation
TargetPercentage of Plan
AllocationAssets at December 31(1)
202020192018
Equity Securities65%72%67%
Debt Securities30%19%21%
Cash and Cash Equivalents5%9%12%
Total100%100%100%

(1) Represents asset allocation at December 31 which may differ from the average target allocation for the year due to the year-end cash contribution to the plan.

Schedule of fair value of plan assets by level of the valuation inputs within the fair value hierarchy
(Dollars in Thousands)20192018
Level 1:
U.S. Treasury Securities$907$398
Mutual Funds142,127$112,131
Cash and Cash Equivalents13,94316,788
Level 2:
U.S. Government Agency2,0782,822
Corporate Notes/Bonds2,5912,396
Total Fair Value of Plan Assets$161,646$134,535
Schedule of expected benefit payments related to the defined benefit pension plan
Expected Benefit Payments. At December 31, expected benefit payments related to the defined benefit pension plan were as follows:
(Dollars in Thousands)2019
2020$14,230
202113,551
202213,268
202313,089
202413,216
2025 through 202957,999
Total$125,353
Schedule of amounts contributed to the pension plan and the expected amount to be contributed
Expected
Contribution
(Dollars in Thousands)201820192020(1)
Actual Contributions$23,000$5,000$5,000
Schedule of components of SERP's periodic benefit cost, the funded status of the plan, amounts recognized in the consolidated statements of financial condition, and major assumptions
(Dollars in Thousands)201920182017
Change in Projected Benefit Obligation:
Benefit Obligation at Beginning of Year$8,860$7,285$5,741
Interest Cost349227191
Actuarial Loss1,0351,3481,353
Projected Benefit Obligation at End of Year$10,244$8,860$7,285
Funded Status of Plan and Accrued Liability Recognized at End of Year:
Other Liabilities$10,244$8,860$7,285
Accumulated Benefit Obligation at End of Year$8,778$7,557$6,485
Components of Net Periodic Benefit Costs:
Interest Cost349227191
Net Loss Amortization7611,626597
Net Periodic Benefit Cost$1,110$1,853$788
Weighted-Average Assumptions Used to Determine Benefit Obligation:
Discount Rate3.16%4.23%3.53%
Rate of Compensation Increase(1)4.00%4.00%3.25%
Measurement Date12/31/1912/31/1812/31/17
Weighted-Average Assumptions Used to Determine Benefit Cost:
Discount Rate4.23%3.53%3.92%
Rate of Compensation Increase(1)3.50%3.25%3.25%
Amortization Amounts from Accumulated Other Comprehensive Income:
Net Actuarial Loss$1,035$1,348$1,353
Net Loss(761)(1,626)(597)
Deferred Tax (Benefit) Expense (70)71(77)
Other Comprehensive Loss (Gain), net of tax$204$(207)$679
Amounts Recognized in Accumulated Other Comprehensive Income:
Net Actuarial Loss$1,622$1,348$1,626
Deferred Tax Benefit(411)(341)(412)
Accumulated Other Comprehensive Loss, net of tax$1,211$1,007$1,214
(1) Effective 12/31/2018, the Company utilized an age-graded approach that varies the rate based on the age of the participants.
Schedule of expected benefit payments related to the SERP
(Dollars in Thousands)2019
2020$4,059
20212,618
20222,478
20231,419
2024211
2025 through 2029-
Total$10,785