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Reclassifications Out of Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Reclassifications Out of Accumulated Other Comprehensive Loss |
| MSA Safety Incorporated |  | Noncontrolling Interests
(In thousands) | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Pension and other post-retirement benefits(a) |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (124,848) |  |  | $ | (115,517) |  |  | $ | (97,948) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Unrecognized net actuarial losses | (6,322) |  |  | (19,479) |  |  | (37,977) |  |  | — |  |  | — |  |  | — |
Tax benefit | 1,997 |  |  | 5,847 |  |  | 9,936 |  |  | — |  |  | — |  |  | — |
Total other comprehensive loss before reclassifications, net of tax | (4,325) |  |  | (13,632) |  |  | (28,041) |  |  | — |  |  | — |  |  | — |
Amounts reclassified from accumulated other comprehensive loss into net income: |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit (Note 14) | (216) |  |  | (180) |  |  | (424) |  |  | — |  |  | — |  |  | — |
Recognized net actuarial losses (Note 14) | 18,079 |  |  | 11,028 |  |  | 14,507 |  |  | — |  |  | — |  |  | — |
Tax benefit | (4,242) |  |  | (2,775) |  |  | (3,611) |  |  | — |  |  | — |  |  | — |
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income | 13,621 |  |  | 8,073 |  |  | 10,472 |  |  | — |  |  | — |  |  | — |
Reclassification to retained earnings due to the adoption of ASU 2018-02 (Note 1) | — |  |  | (3,772) |  |  | — |  |  | — |  |  | — |  |  | — |
Total other comprehensive income (loss) | $ | 9,296 |  |  | $ | (9,331) |  |  | $ | (17,569) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Balance at end of period | $ | (115,552) |  |  | $ | (124,848) |  |  | $ | (115,517) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | 6 |  |  | $ | (572) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Unrealized (loss) gain on available-for-sale securities (Note 18) | (7) |  |  | 578 |  |  | (572) |  |  | — |  |  | — |  |  | — |
Balance at end of period | $ | (1) |  |  | $ | 6 |  |  | $ | (572) |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Foreign currency translation |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (89,161) |  |  | $ | (102,838) |  |  | $ | (73,814) |  |  | $ | 423 |  |  | $ | 496 |  |  | $ | 801 |
Reclassification from accumulated other comprehensive loss into net income | 216 |  | (c) | 15,261 |  | (b) | 774 |  | (c) | — |  |  | — |  |  | — |
Foreign currency translation adjustments | 22,101 |  |  | (1,584) |  |  | (29,798) |  |  | 159 |  |  | (73) |  |  | (305) |
Balance at end of period | $ | (66,844) |  |  | $ | (89,161) |  |  | $ | (102,838) |  |  | $ | 582 |  |  | $ | 423 |  |  | $ | 496 |

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