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Schedule of Defined Benefit Pension and Postretirement Benefit Plan Assets and Obligation (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure |  |  |  |  |  |  |
Actuarial loss | $ 7,700 | $ 2,700 | $ 100 | $ 7,700 |  | $ (29,000) |
Ending Balance | 160,700 |  |  |  | $ 160,700 |  |
UNITED STATES |  |  |  |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |  |  |  |
Projected benefit obligation, Beginning of year |  |  |  |  | 203,791 | 178,237 |
Service cost |  |  |  |  | 1,773 | 1,608 | $ 2,196
Interest cost |  |  |  |  | 5,770 | 7,189 | 8,940
Actuarial loss |  |  |  |  | 24,671 | 24,447 |
Benefits paid |  |  |  |  | (9,844) | (7,690) |
Retiree annuity purchase |  |  |  |  | (24,379) |  |
Liability loss due to settlement |  |  |  |  | 451 |  |
Non-U.S. currency movement |  |  |  |  | 0 |  |
Projected benefit obligation, End of year | 202,233 |  |  | 203,791 | 202,233 | 203,791 | 178,237
Beginning Balance |  |  |  |  | 166,932 | 144,301 |
Actual return on plan assets |  |  |  |  | 23,048 | 27,516 |
Company contributions |  |  |  |  | 3,098 | 2,805 |
Benefits paid |  |  |  |  | (9,844) | (7,690) |
Retiree annuity purchase |  |  |  |  | (24,379) |  |
Non-U.S. currency movement |  |  |  |  | 0 |  |
Ending Balance | 158,855 |  |  | 166,932 | 158,855 | 166,932 | 144,301
Funded status | (43,378) |  |  | (36,859) | (43,378) | (36,859) |
Foreign Pension Plans, Defined Benefit |  |  |  |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |  |  |  |
Projected benefit obligation, Beginning of year |  |  |  |  | 43,952 | 39,146 |
Service cost |  |  |  |  | 907 | 751 | 786
Interest cost |  |  |  |  | 516 | 691 | 687
Actuarial loss |  |  |  |  | 2,951 | 4,520 |
Benefits paid |  |  |  |  | (1,299) | (836) |
Retiree annuity purchase |  |  |  |  | 0 |  |
Liability loss due to settlement |  |  |  |  | 0 |  |
Non-U.S. currency movement |  |  |  |  | 3,961 | (320) |
Projected benefit obligation, End of year | 50,988 |  |  | 43,952 | 50,988 | 43,952 | 39,146
Beginning Balance |  |  |  |  | 1,586 | 1,400 |
Actual return on plan assets |  |  |  |  | 67 | 64 |
Company contributions |  |  |  |  | 1,079 | 923 |
Benefits paid |  |  |  |  | (988) | (836) |
Retiree annuity purchase |  |  |  |  | 0 |  |
Non-U.S. currency movement |  |  |  |  | 112 | 35 |
Ending Balance | 1,856 |  |  | 1,586 | 1,856 | 1,586 | 1,400
Funded status | (49,132) |  |  | (42,366) | (49,132) | (42,366) |
Postretirement Benefit Plans |  |  |  |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |  |  |  |
Projected benefit obligation, Beginning of year |  |  |  |  | 9,003 | 9,256 |
Service cost |  |  |  |  | 57 | 41 | 39
Interest cost |  |  |  |  | 240 | 347 | 196
Actuarial loss |  |  |  |  | 421 | 717 |
Benefits paid |  |  |  |  | (1,205) | (1,358) |
Projected benefit obligation, End of year | 8,515 |  |  | 9,003 | 8,515 | 9,003 | $ 9,256
Beginning Balance |  |  |  |  | 0 |  |
Company contributions |  |  |  |  | 1,205 | 1,358 |
Benefits paid |  |  |  |  | (1,205) | (1,358) |
Ending Balance | 0 |  |  | 0 | 0 | 0 |
Funded status | $ (8,515) |  |  | $ (9,003) | $ (8,515) | $ (9,003) |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: 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=118257860&loc=d3e4179-114921 Reference 5: 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) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: 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=118257860&loc=d3e4179-114921 + Details
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