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Pension & Postretirement Expenses | 9 Months Ended
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Jun. 30, 2018
Defined Benefit Plan [Abstract] |
Pension And Postretirement Plan Expenses |
| Total periodic pension and postretirement expense is summarized below:
| Three Months Ended June 30, |  | Nine Months Ended June 30,
|  | 2017 |  |  | 2018 |  |  | 2017 |  |  |  | 2018
Service cost |  | $ | 21 |  |  |  | 19 |  |  |  | 63 |  |  |  | 57 |
Interest cost |  | 42 |  |  |  | 46 |  |  |  | 126 |  |  |  | 139 |
Expected return on plan assets |  | (86 | ) |  |  | (87 | ) |  |  | (258 | ) |  |  | (262 | )
Net amortization |  | 53 |  |  |  | 30 |  |  |  | 159 |  |  |  | 91 |
Total |  | $ | 30 |  |  |  | 8 |  |  |  | 90 |  |  |  | 25 |

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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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