XML 26 R15.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Pension and Other Postretirement Benefit Plans | 9 Months Ended
--- | ---
Jun. 30, 2018
Retirement Benefits [Abstract] |
Pension and Other Postretirement Benefit Plans | Pension and Other Postretirement Benefit Plans The Company provides defined benefit pension and other postretirement plans to certain employees. Net periodic pension and other postretirement benefit cost for the plans included the following:
| Three months ended June 30,
| Pension |  | Other Postretirement
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 2,039 |  |  | $ | 2,138 |  |  | $ | 84 |  |  | $ | 98 |
Interest cost | 2,049 |  |  | 1,841 |  |  | 158 |  |  | 157 |
Expected return on plan assets | (2,534 | ) |  | (2,312 | ) |  | — |  |  | — |
Amortization: |  |  |  |  |  |  |  |  |  |  |
Prior service cost | (35 | ) |  | (45 | ) |  | (49 | ) |  | (49 | )
Net actuarial loss | 1,753 |  |  | 2,509 |  |  | — |  |  | — |
Net benefit cost | $ | 3,272 |  |  | $ | 4,131 |  |  | $ | 193 |  |  | $ | 206 |
| Nine months ended June 30,
| Pension |  | Other Postretirement
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 6,117 |  |  | $ | 6,414 |  |  | $ | 252 |  |  | $ | 294 |
Interest cost | 6,147 |  |  | 5,523 |  |  | 474 |  |  | 471 |
Expected return on plan assets | (7,602 | ) |  | (6,936 | ) |  | — |  |  | — |
Amortization: |  |  |  |  |  |  |  |  |  |  |
Prior service cost | (105 | ) |  | (135 | ) |  | (147 | ) |  | (147 | )
Net actuarial loss | 5,257 |  |  | 7,527 |  |  | — |  |  | — |
Net benefit cost | $ | 9,814 |  |  | $ | 12,393 |  |  | $ | 579 |  |  | $ | 618 |
Benefit payments under the Company's principal retirement plan are made from plan assets, while benefit payments under the postretirement benefit plan are made from the Company's operating funds. Under IRS regulations, the Company is not required to make any significant contributions to its principal retirement plan in fiscal year 2018. Contributions made and anticipated for fiscal year 2018 are as follows:
Contributions |  | Pension |  | Other Postretirement
Contributions during the nine months ended June 30, 2018: |  |  |  |
Principal retirement plan |  | $ | 10,000 |  |  | $ | — |
Supplemental retirement plan |  | 575 |  |  | — |
Other postretirement plan |  | — |  |  | 1,281 |
Additional contributions expected in fiscal 2018: |  |  |  |  |  |
Supplemental retirement plan |  | $ | 191 |  |  | $ | — |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration