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Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2021
Defined Benefit Pension Plans |
Defined Benefit Plan Disclosure |
Components of Net Periodic Expense (Benefit) | Components of net periodic expense (benefit) are as follows: Defined Benefit Pension Plans
|  | U.S. |  | Foreign
|  | Three months ended June 30, |  | Three months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost |  | $ | — |  |  | $ | 192 |  |  | $ | — |  |  | $ | 262 |
Interest cost |  | 551 |  |  | 675 |  |  | 65 |  |  | 73 |
Expected return on plan assets |  | (1,094) |  |  | (970) |  |  | (65) |  |  | (70) |
Amortization of net loss |  | — |  |  | — |  |  | — |  |  | 23 |
Net periodic expense (benefit) |  | $ | (543) |  |  | $ | (103) |  |  | $ | — |  |  | $ | 288 |
|  | U.S. |  | Foreign
|  | Six months ended June 30, |  | Six months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost |  | $ | — |  |  | $ | 384 |  |  | $ | — |  |  | $ | 521 |
Interest cost |  | 1,102 |  |  | 1,351 |  |  | 130 |  |  | 144 |
Expected return on plan assets |  | (2,187) |  |  | (1,940) |  |  | (130) |  |  | (138) |
Amortization of net loss |  | — |  |  | — |  |  | — |  |  | 46 |
Net periodic (benefit) expense |  | $ | (1,085) |  |  | $ | (205) |  |  | $ | — |  |  | $ | 573 |
Other Postretirement Benefits Plans |
Defined Benefit Plan Disclosure |
Components of Net Periodic Expense (Benefit) | Other Postretirement Benefit Plans
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Interest cost |  | 4 |  |  | 5 |  |  | 8 |  |  | 10 |
Amortization of prior service credit |  | (58) |  |  | (58) |  |  | (116) |  |  | (116) |
Amortization of net loss |  | 2 |  |  | — |  |  | 3 |  |  | — |
Net periodic benefit |  | $ | (52) |  |  | $ | (53) |  |  | $ | (105) |  |  | $ | (106) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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