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Pension and Postretirement Benefits (Tables) | 6 Months Ended
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Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract] |
Summary of Net Periodic Benefit Cost Recognized | The following table summarizes the net periodic benefit cost recognized for each of the periods indicated under these plans (in thousands):
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | Three Months Ended |  |  | Three Months Ended |
|  | December 31, 2017 |  |  | January 1, 2017 |  |  | December 31, 2017 |  |  | January 1, 2017 |
Service cost |  | $ | 16 |  |  | $ | 13 |  |  | $ | 4 |  |  | $ | 4 |
Interest cost |  |  | 964 |  |  |  | 981 |  |  | 11 |  |  |  | 13 |
Expected return on plan assets |  |  | (1,527 | ) |  |  | (1,463 | ) |  |  | — |  |  |  | — |
Amortization of prior service cost (credit) |  | 3 |  |  |  | 3 |  |  |  | (191 | ) |  |  | (191 | )
Amortization of unrecognized net loss |  | 508 |  |  |  | 807 |  |  | 120 |  |  |  | 134 |
Net periodic benefit (credit) cost |  | $ | (36 | ) |  | $ | 341 |  |  | $ | (56 | ) |  | $ | (40 | )
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | Six Months Ended |  |  | Six Months Ended |
|  | December 31, 2017 |  |  | January 1, 2017 |  |  | December 31, 2017 |  |  | January 1, 2017 |
Service cost |  | $ | 33 |  |  | $ | 27 |  |  | $ | 7 |  |  | $ | 7 |
Interest cost |  |  | 1,928 |  |  |  | 1,962 |  |  |  | 22 |  |  |  | 27 |
Expected return on plan assets |  |  | (3,055 | ) |  |  | (2,927 | ) |  |  | — |  |  |  | — |
Amortization of prior service cost (credit) |  | 6 |  |  |  | 6 |  |  |  | (382 | ) |  |  | (382 | )
Amortization of unrecognized net loss |  |  | 1,017 |  |  |  | 1,614 |  |  |  | 240 |  |  |  | 269 |
Net periodic benefit (credit) cost |  | $ | (71 | ) |  | $ | 682 |  |  | $ | (113 | ) |  | $ | (79 | )

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- References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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