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RETIREMENT PLANS (Tables) | 9 Months Ended
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Jun. 30, 2020
RETIREMENT PLANS |
Schedule of components of net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Nine Months Ended |
​ | ​ | June 30, | ​ | June 30, | ​
(In thousands) | ​ | 2020 |  | 2019 |  | 2020 |  | 2019 | ​
Defined benefit plans | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest cost | ​ | $ | 616 |  | 875 | ​ |  | 2,264 |  | 2,626 | ​
Expected return on assets | ​ |  | (1,067) |  | (1,086) | ​ |  | (3,149) |  | (3,259) | ​
Amortization of: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Prior service cost | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | — | ​
Actuarial loss | ​ |  | 715 |  | 487 | ​ |  | 1,801 |  | 1,461 | ​
Net periodic benefit cost | ​ | $ | 264 |  | 276 | ​ |  | 916 |  | 828 | ​

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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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