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Defined Benefit Post-retirement Plans | 3 Months Ended
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Mar. 31, 2018
Defined Benefit Post-retirement Plans [Abstract] |
Defined Benefit Post-retirement Plans | 5. Defined Benefit Post-Retirement Plans The Company has a qualified, noncontributory, defined benefit pension plan ("the Plan") covering substantially all of its employees at March 31, 2018. Benefits paid from the plan are based on age, years of service, compensation, social security benefits and are determined in accordance with defined formulas. The Company's policy is to fund the Plan in accordance with Employee Retirement Income Security Act of 1974 standards. Assets of the Plan are invested in publicly traded stocks and mutual funds. In addition to the Plan, the Company provides supplemental employee retirement plans to certain current and former executives. The Company also assumed supplemental retirement plans for certain current and former executives in the Alliance Financial Corporation ("Alliance") acquisition. The supplemental employee retirement plans and the Plan are collectively referred to herein as "Pension Benefits." In addition, the Company provides certain health care benefits for retired employees. Benefits were accrued over the employees' active service period. Only employees that were employed by the Company on or before January 1, 2000 are eligible to receive post-retirement health care benefits. In addition, the Company assumed post-retirement medical life insurance benefits for certain Alliance employees, retirees and their spouses, if applicable, in the Alliance acquisition. These post-retirement benefits are referred to herein as "Other Benefits." The Company made no voluntary contributions to the pension and other benefits plans in 2017 and did not do so during the three months ended March 31, 2018. The components of expense for Pension Benefits and Other Benefits are set forth below:
| Pension Benefits |  | Other Benefits |
| Three months ended March 31, |  | Three months ended March 31, |
(In thousands) | 2018 |  | 2017 |  | 2018 |  | 2017 |
Components of net periodic (benefit) cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 420 |  |  | $ | 402 |  |  | $ | 3 |  |  | $ | 3 |
Interest cost |  |  | 920 |  |  |  | 1,042 |  |  |  | 82 |  |  |  | 86 |
Expected return on plan assets |  |  | (2,123 | ) |  |  | (1,985 | ) |  |  | - |  |  |  | - |
Net amortization |  |  | 251 |  |  |  | 415 |  |  |  | 44 |  |  |  | 20 |
Total net periodic (benefit) cost |  | $ | (532 | ) |  | $ | (126 | ) |  | $ | 129 |  |  | $ | 109 |
The service cost component of net periodic (benefit) cost is included in salaries and employee benefits and the interest cost, expected return on plan assets and net amortization components are included in Other noninterest expense on the unaudited interim consolidated statements of income.

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- References No definition available. + Details
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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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