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Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure |  |  |
Net actuarial (gain) loss | $ (3,316) | $ (6,624) | $ (3,203)
UNITED STATES |  |  |
Defined Benefit Plan Disclosure |  |  |
Service cost | 2,196 | 2,239 | 2,302
Interest cost | 8,940 | 13,151 | 13,630
Expected return on plan assets | (9,049) | (12,008) | (13,830)
Amortization of prior service cost | 58 | 70 | 96
Net actuarial (gain) loss | (4,429) | (6,712) | (4,013)
Settlement loss | 345 |  |
Total net periodic pension (income) cost | (1,939) | (3,260) | (1,815)
Prior service cost | (58) | (70) | (96)
Total recognized in other comprehensive income | (58) | (70) | (96)
Total recognized in net periodic postretirement benefit cost (income) and other comprehensive income | (1,997) | (3,330) | (1,911)
Foreign Pension Plans, Defined Benefit |  |  |
Defined Benefit Plan Disclosure |  |  |
Service cost | 786 | 818 | 761
Interest cost | 687 | 852 | 1,185
Expected return on plan assets | (19) | (165) | (443)
Amortization of prior service cost |  |  |
Net actuarial (gain) loss | 743 | (310) | 815
Settlement loss |  |  |
Total net periodic pension (income) cost | 2,197 | 1,195 | 2,318
Prior service cost |  |  |
Total recognized in other comprehensive income |  |  |
Total recognized in net periodic postretirement benefit cost (income) and other comprehensive income | 2,197 | 1,195 | 2,318
Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure |  |  |
Service cost | 39 | 34 | 37
Interest cost | 196 | 201 | 218
Amortization of prior service cost | (373) | (496) | (607)
Net actuarial (gain) loss | 25 | 398 | 5
Special termination benefits | 3,708 | 591 |
Total net periodic pension (income) cost | 3,595 | 728 | (347)
Prior service cost |  |  | (93)
Prior service credit | 373 | 496 | 607
Total recognized in other comprehensive income | 373 | 496 | 514
Total recognized in net periodic postretirement benefit cost (income) and other comprehensive income | $ 3,968 | $ 1,224 | $ 167

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