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STOCKHOLDERS' EQUITY (Tables) | 3 Months Ended
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Mar. 31, 2021
STOCKHOLDERS' EQUITY |
Components of accumulated other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31 |  | December 31 | ​
​ |  | 2021 |  | 2020 |
​ | ​ | (in thousands) | ​
Pre-tax amounts: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrecognized net periodic benefit credit | ​ | $ | 4,255 | ​ | $ | 4,390 | ​
Interest rate swap | ​ | ​ | (843) | ​ | ​ | (1,622) | ​
Foreign currency translation | ​ |  | (735) | ​ |  | (1,182) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 2,677 | ​ | $ | 1,586 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
After-tax amounts: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrecognized net periodic benefit credit | ​ | $ | 3,160 | ​ | $ | 3,260 | ​
Interest rate swap | ​ | ​ | (623) | ​ | ​ | (1,198) | ​
Foreign currency translation | ​ |  | (543) | ​ |  | (872) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 1,994 | ​ | $ | 1,190 | ​
Summary of changes in accumulated other comprehensive income (loss), net of tax, by component | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrecognized | ​ | ​ | Interest |  | Foreign | ​
​ | ​ | ​ | ​ | ​ | Net Periodic | ​ | ​ | Rate | ​ | Currency | ​
​ |  | Total |  | Benefit Costs |  | ​ | Swap |  | Translation | ​
​ | ​ | (in thousands) | ​
Balances at December 31, 2020 | ​ | $ | 1,190 | ​ | $ | 3,260 | ​ | $ | (1,198) | ​ | $ | (872) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income before reclassifications | ​ |  | 904 | ​ |  | — | ​ | ​ | 575 | ​ |  | 329 | ​
Amounts reclassified from accumulated other comprehensive loss | ​ |  | (100) | ​ |  | (100) | ​ | ​ | — | ​ |  | — | ​
Net current-period other comprehensive income (loss) | ​ |  | 804 | ​ |  | (100) | ​ | ​ | 575 | ​ |  | 329 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balances at March 31, 2021 | ​ | $ | 1,994 | ​ | $ | 3,160 | ​ | $ | (623) | ​ | $ | (543) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balances at December 31, 2019 | ​ | ​ | 203 | ​ | ​ | 2,152 | ​ | ​ | (416) | ​ | ​ | (1,533) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive loss before reclassifications | ​ | ​ | (2,425) | ​ | ​ | (8) | ​ | ​ | (997) | ​ | ​ | (1,420) | ​
Amounts reclassified from accumulated other comprehensive income | ​ | ​ | (42) | ​ | ​ | (42) | ​ | ​ | — | ​ | ​ | — | ​
Net current-period other comprehensive loss | ​ | ​ | (2,467) | ​ | ​ | (50) | ​ | ​ | (997) | ​ | ​ | (1,420) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balances at March 31, 2020 | ​ | $ | (2,264) | ​ | $ | 2,102 | ​ | $ | (1,413) | ​ | $ | (2,953) | ​
​
Summary of the significant reclassifications out of accumulated other comprehensive income (loss) by component | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrecognized Net Periodic | ​
​ | ​ | Benefit Credit(1)(2) |
​ | ​ | Three Months Ended March 31 | ​
​ |  | 2021 |  | 2020 |
​ | ​ | (in thousands) |
Amortization of net actuarial gain | ​ | $ | 135 | ​ | $ | 145 | ​
Pension settlement expense(3) | ​ | ​ | — | ​ |  | (89) | ​
Total, pre-tax | ​ | ​ | 135 | ​ |  | 56 | ​
Tax expense | ​ | ​ | (35) | ​ |  | (14) | ​
Total, net of tax | ​ | $ | 100 | ​ | $ | 42 | ​
​
(1) | Amounts in parentheses indicate increases in expense or loss.
(2) | These components of accumulated other comprehensive income are included in the computation of net periodic benefit cost as disclosed in Note G.
(3) | For the three months ended March 31, 2020, pension settlement expense is related to the supplemental benefit plan (see Note G).
Summary of dividends declared | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2021 | ​ | 2020 | ​
​ |  | Per Share |  | Amount |  | Per Share |  | Amount |
​ | ​ | (in thousands, except per share data)
First quarter | ​ | $ | 0.08 | ​ | $ | 2,037 | ​ | $ | 0.08 | ​ | $ | 2,033 | ​

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