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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Defined benefit plans: |  |  |  |
Multiemployer pension plans | $ 442 | $ 379 | $ 882 | $ 788
Defined contribution pension plans | 3,120 | 1,897 | 6,533 | 5,066
Pension Plan | U.S. Plans |  |  |  |
Defined benefit plans: |  |  |  |
Service cost | 0 | 0 | 0 | 0
Interest cost | 1,203 | 1,845 | 2,406 | 3,690
Expected return on plan assets | (3,050) | (2,842) | (6,100) | (5,684)
Recognized prior service costs | 0 | 0 | 0 | 0
Recognized loss | 1,385 | 1,225 | 2,770 | 2,650
Defined benefit pension plans net periodic pension cost (benefit) | (462) | 228 | (924) | 656
Defined benefit pension plan | 451 | 460 | 3,317 | 2,487
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year | 900 |  | 900 |
Pension Plan | International Plans |  |  |  |
Defined benefit plans: |  |  |  |
Service cost | 500 | 426 | 993 | 855
Interest cost | 3,242 | 4,235 | 6,435 | 8,630
Expected return on plan assets | (11,511) | (9,833) | (22,878) | (20,023)
Recognized prior service costs | 129 | 106 | 256 | 213
Recognized loss | 4,622 | 3,532 | 9,185 | 7,187
Defined benefit pension plans net periodic pension cost (benefit) | (3,018) | (1,534) | (6,009) | (3,138)
Defined benefit pension plan | 4,301 | $ 1,493 | 16,923 | $ 11,553
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year | $ 8,600 |  | $ 8,600 |

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