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Pension and Other Postretirement Benefit Plans | 3 Months Ended
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Mar. 31, 2020
Notes to Financial Statements |
Pension and Other Postretirement Benefits Disclosure [Text Block] | 10. Pension and Other Postretirement Benefit Plans The following table sets forth information regarding the components of net expense for the pension and other postretirement benefit plans. ​
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​ | Three months ended
​ | March 31,
(In thousands) | 2020 |  | 2019
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Employee Pension Plan: | ​ |  |  | ​ |
Interest cost | $ | 163 | ​ | $ | 199
Amortization of unrecognized loss |  | 111 | ​ |  | 67
Expected return on plan assets |  | (257) | ​ |  | (272)
Net employee pension expense (benefit) | $ | 17 | ​ | $ | (6)
​ | ​ | ​ | ​ | ​ | ​
Outside Director Pension Plan: |  |  | ​ |  |
Service cost | $ | 4 | ​ | $ | 10
Interest cost |  | 16 | ​ |  | 21
Amortization of unrecognized gain |  | (14) | ​ |  | (35)
Amortization of past service liability |  | — | ​ |  | —
Net outside director pension expense (benefit) | $ | 6 | ​ | $ | (4)
​ | ​ | ​ | ​ | ​ | ​
Other Postretirement Benefit Plans: |  |  | ​ |  |
Service cost | $ | 69 | ​ | $ | 70
Interest cost |  | 65 | ​ |  | 85
Amortization of past service credit |  | (20) | ​ |  | (22)
Net other postretirement expense | $ | 114 | ​ | $ | 133
​ The Company previously disclosed in its Consolidated Financial Statements for the year ended December 31, 2019 that it expects to contribute $0.3 million to each of the Outside Director Pension Plan (the “Outside Director Pension Plan”) and the other postretirement benefit plans (the “Other Postretirement Benefit Plans”), during the year ending December 31, 2020. The Company does not expect to make a contribution to the Employee Pension Plan (the “Employee Pension Plan”). As of March 31, 2020, the Company had contributed $36,000 to the Outside Director Pension Plan and $18,000 in contributions were made to the Other Postretirement Benefit Plans. As of March 31, 2020, the Company has not revised its expected contributions for the year ending December 31, 2020.

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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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