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RETIREMENT PLANS | 9 Months Ended
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Jun. 30, 2020
RETIREMENT PLANS |
RETIREMENT PLANS | 12. RETIREMENT PLANS A summary of net periodic benefit expense for the Company’s defined benefit plans for the three and nine-month periods ended June 30, 2020 and 2019 is shown in the following table. Net periodic benefit cost for each period presented is comprised of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 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 The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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