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Benefit Plans (Tables) | 12 Months Ended
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Jun. 30, 2017
Retirement Benefits, Description [Abstract] |
Summary of changes in benefit obligations, plan assets and funded status for the post employment plans | The following table sets forth the changes in benefit obligations and plan assets during the year and the funded status for the post-employment plans at June 30:
| Pension Benefits |  | Retiree Health Care Benefits
| 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Change in benefit obligation: |  |  |  |  |  |  |
Benefit obligation at beginning of the year | $ | 26,605 |  |  | $ | 29,994 |  |  | $ | 2,235 |  |  | $ | 2,144 |
Service cost | 126 |  |  | 91 |  |  | 29 |  |  | 22 |
Interest cost | 687 |  |  | 879 |  |  | 63 |  |  | 75 |
Plan participants’ contributions | — |  |  | — |  |  | 69 |  |  | 60 |
Benefits paid | (1,562 | ) |  | (5,555 | ) |  | (237 | ) |  | (229 | )
Amendments | — |  |  | — |  |  | (245 | ) |  | — |
Actuarial (gain) loss during year | (1,445 | ) |  | 1,196 |  |  | (230 | ) |  | 163 |
Benefit obligation at end of year | $ | 24,411 |  |  | $ | 26,605 |  |  | $ | 1,684 |  |  | $ | 2,235 |
Change in plan assets: |  |  |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 6,737 |  |  | $ | 7,185 |  |  | $ | — |  |  | $ | — |
Actual gain (loss) on plan assets | 578 |  |  | (149 | ) |  | — |  |  | — |
Employer contributions | 776 |  |  | 5,256 |  |  | 168 |  |  | 169 |
Plan participants’ contributions | — |  |  | — |  |  | 69 |  |  | 60 |
Benefits paid | (1,561 | ) |  | (5,555 | ) |  | (237 | ) |  | (229 | )
Fair value of plan assets at end of year | $ | 6,530 |  |  | $ | 6,737 |  |  | $ | — |  |  | $ | — |
Funded status at end of year | $ | (17,881 | ) |  | $ | (19,868 | ) |  | $ | (1,684 | ) |  | $ | (2,235 | )
Amounts Recognized in Consolidated Balance Sheet [Table Text Block] | The amounts recognized in the consolidated balance sheets and in accumulated other comprehensive loss for the post-employment plans were as follows:
| Pension Benefits |  | Retiree Health Care Benefits
June 30, | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Amounts recognized in the consolidated balance sheets: |  |  |  |  |  |  |
Other current liabilities | $ | 2,814 |  |  | $ | 741 |  |  | $ | 220 |  |  | $ | 220 |
Post-employment benefits | 15,067 |  |  | 19,127 |  |  | 1,464 |  |  | 2,015 |
Net amount recognized | $ | 17,881 |  |  | $ | 19,868 |  |  | $ | 1,684 |  |  | $ | 2,235 |
Amounts recognized in accumulated other comprehensive loss: |  |  |  |  |  |  |
Net actuarial (loss) gain | $ | (5,798 | ) |  | $ | (8,234 | ) |  | $ | 1,167 |  |  | $ | 1,119 |
Prior service cost | (35 | ) |  | (121 | ) |  | 922 |  |  | 948 |
Total amounts recognized in accumulated other comprehensive loss | $ | (5,833 | ) |  | $ | (8,355 | ) |  | $ | 2,089 |  |  | $ | 2,067 |
Information for pension plans with projected benefit obligations in excess of plan assets | The following table provides information for pension plans with projected benefit obligations and accumulated benefit obligations in excess of plan assets:
| Pension Benefits
June 30, | 2017 |  |  | 2016 |
Projected benefit obligations | $ | 24,411 |  |  | $ | 26,605 |
Accumulated benefit obligations | 24,411 |  |  | 26,605 |
Fair value of plan assets | 6,530 |  |  | 6,737 |
Net periodic costs | The net periodic costs (benefits) are as follows:
| Pension Benefits |  | Retiree Health Care Benefits
Year Ended June 30, | 2017 |  |  | 2016 |  |  | 2015 |  |  | 2017 |  |  | 2016 |  |  | 2015 |
Service cost | $ | 126 |  |  | $ | 91 |  |  | $ | 97 |  |  | $ | 29 |  |  | $ | 22 |  |  | $ | 53 |
Interest cost | 687 |  |  | 879 |  |  | 896 |  |  | 63 |  |  | 75 |  |  | 95 |
Expected return on plan assets | (460 | ) |  | (491 | ) |  | (495 | ) |  | — |  |  | — |  |  | — |
Recognized net actuarial loss (gain) | 872 |  |  | 913 |  |  | 559 |  |  | (181 | ) |  | (210 | ) |  | (87 | )
Amortization of prior service cost | 86 |  |  | 86 |  |  | 86 |  |  | (271 | ) |  | (271 | ) |  | (272 | )
Net periodic cost (benefits) | $ | 1,311 |  |  | $ | 1,478 |  |  | $ | 1,143 |  |  | $ | (360 | ) |  | $ | (384 | ) |  | $ | (211 | )
Weighted-average actuarial assumptions used to determine benefit obligations and net periodic benefit cost | The weighted-average actuarial assumptions used to determine benefit obligations and net periodic benefit cost for the plans were as follows:
| Pension Benefits |  | Retiree Health Care Benefits
June 30, | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Assumptions used to determine benefit obligations at year end: |  |  |  |  |  |  |
Discount rate | 2.8 | % |  | 2.3 | % |  | 3.3 | % |  | 3.3 | %
Assumptions used to determine net periodic benefit cost: |  |  |  |  |  |  |
Discount rate | 2.3 | % |  | 3.0 | % |  | 2.9 | % |  | 4.0 | %
Expected return on plan assets | 7.0 | % |  | 7.0 | % |  | N/A |  |  | N/A |
One-Percentage Point Change in Assumed Health Care Cost Trend Rates | A one-percentage point change in the assumed health care cost trend rates would have had the following effects as of June 30, 2017 and for the year then ended:
| One-Percentage Point |
| Increase |  | Decrease
Effect on total service and interest cost components of periodic expense | $ | 15 |  |  | $ | (12 | )
Effect on post-retirement benefit obligation | 159 |  |  | (135 | )
Defined Benefit Plan Asset Information | Following are the fair values and target allocation as of June 30:
| Target Allocation |  | Fair Value
|  |  | 2017 |  |  | 2016 |
Asset Class: |  |  |  |  |
Equity* securities (Level 1) | 40 – 70% |  | $ | 3,880 |  |  | $ | 3,843 |
Debt securities (Level 2) | 20 – 50% |  | 2,538 |  |  | 2,759 |
Other (Level 1) | 0 – 20% |  | 112 |  |  | 135 |
Total | 100% |  | $ | 6,530 |  |  | $ | 6,737 |
Estimated future benefit payments | The following benefit payments, which reflect expected future service, as applicable, are expected to be paid in each of the next five years and in the aggregate for the subsequent five years:
During Fiscal Years | Pension Benefits |  |  | Retiree Health Care Benefits |
2018 | $ | 3,200 |  |  | $ | 190 |
2019 | 3,700 |  |  | 150 |
2020 | 3,800 |  |  | 130 |
2021 | 1,300 |  |  | 120 |
2022 | 1,300 |  |  | 110 |
2023 through 2027 | 4,400 |  |  | 480 |

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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