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Benefit Plans | 9 Months Ended
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May 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Benefit plans | Benefit Plans We have various pension and other defined benefit and defined contribution plans, in which substantially all employees may participate. We also have non-qualified supplemental executive and Board retirement plans. Components of net periodic benefit costs for the three and nine months ended May 31, 2016, and 2015 are as follows:
| Qualified Pension Benefits |  | Non-Qualified Pension Benefits |  | Other Benefits
| 2016 |  | 2015 |  | 2016 |  | 2015 |  | 2016 |  | 2015
Components of net periodic benefit costs for the three months ended May 31 are as follows: | (Dollars in thousands)
Service cost | $ | 9,383 |  |  | $ | 8,889 |  |  | $ | 258 |  |  | $ | 206 |  |  | $ | 353 |  |  | $ | 188 |
Interest cost | 7,691 |  |  | 7,003 |  |  | 352 |  |  | 357 |  |  | 427 |  |  | 288 |
Expected return on assets | (12,013 | ) |  | (12,431 | ) |  | — |  |  | — |  |  | — |  |  | — |
Prior service cost (credit) amortization | 402 |  |  | 407 |  |  | 57 |  |  | 57 |  |  | (30 | ) |  | (30 | )
Actuarial (gain) loss amortization | 4,765 |  |  | 4,916 |  |  | 172 |  |  | 272 |  |  | (116 | ) |  | (342 | )
Net periodic benefit cost | $ | 10,228 |  |  | $ | 8,784 |  |  | $ | 839 |  |  | $ | 892 |  |  | $ | 634 |  |  | $ | 104 |
Components of net periodic benefit costs for the nine months ended May 31 are as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 28,149 |  |  | $ | 27,005 |  |  | $ | 776 |  |  | $ | 656 |  |  | $ | 1,059 |  |  | $ | 1,134 |
Interest cost | 23,075 |  |  | 21,019 |  |  | 1,055 |  |  | 1,061 |  |  | 1,282 |  |  | 1,118 |
Expected return on assets | (36,040 | ) |  | (37,305 | ) |  | — |  |  | — |  |  | — |  |  | — |
Prior service cost (credit) amortization | 1,205 |  |  | 1,223 |  |  | 171 |  |  | 171 |  |  | (90 | ) |  | (90 | )
Actuarial (gain) loss amortization | 14,294 |  |  | 14,724 |  |  | 518 |  |  | 794 |  |  | (348 | ) |  | (553 | )
Net periodic benefit cost | $ | 30,683 |  |  | $ | 26,666 |  |  | $ | 2,520 |  |  | $ | 2,682 |  |  | $ | 1,903 |  |  | $ | 1,609 |
Employer Contributions Total contributions to be made during fiscal 2016, will depend primarily on market returns on the pension plan assets and minimum funding level requirements. During the nine months ended May 31, 2016, CHS made a voluntary contribution of $43.4 million to the pension plans. At this time, we do not anticipate having to make a required contribution for our benefit plans in fiscal 2016.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References No definition available. + Details
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- References No definition available. + Details
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