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Pension and Other Postretirement Benefits - Level 3 Asset Rollforward (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Change in plan assets |  |
Fair value of plan assets at beginning of year | $ 294,566 | $ 302,270
Currency translation adjustment | (17,672) | (9,694)
Fair value of plan assets at end of year | 189,535 | 294,566
Level 3 |  |
Change in plan assets |  |
Fair value of plan assets at beginning of year | 118,053 | 133,333
Purchases | (8,237) | 1,310
Settlements |  | (1,812)
Unrealized (losses) gains | (34,147) | (6,387)
Currency translation adjustment | (6,804) | (8,391)
Fair value of plan assets at end of year | 68,865 | 118,053
Insurance contract | Level 3 |  |
Change in plan assets |  |
Fair value of plan assets at beginning of year | 99,527 | 112,920
Purchases | (1,136) | 1,722
Settlements |  | (1,812)
Unrealized (losses) gains | (32,305) | (5,031)
Currency translation adjustment | (6,123) | (8,272)
Fair value of plan assets at end of year | 59,963 | 99,527
Real estate | Level 3 |  |
Change in plan assets |  |
Fair value of plan assets at beginning of year | 11,547 | 9,775
Purchases | (122) | (78)
Settlements |  | 0
Unrealized (losses) gains | (1,842) | 1,926
Currency translation adjustment | (681) | (76)
Fair value of plan assets at end of year | 8,902 | 11,547
Other - alternative investments | Level 3 |  |
Change in plan assets |  |
Fair value of plan assets at beginning of year | 6,979 | 10,638
Purchases | (6,979) | (334)
Settlements |  | 0
Unrealized (losses) gains | 0 | (3,282)
Currency translation adjustment | 0 | (43)
Fair value of plan assets at end of year | $ 0 | $ 6,979

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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