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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 642,234 | $ 707,755 | $ 692,843
Other comprehensive income (loss): |  |  |
Foreign currency translation | 17,761 | (46,135) | (1,903)
Unrealized losses on derivative instruments before reclassifications | (2,648) | 0 | 0
Amounts reclassified to interest income | (326) | 0 | 0
Unrealized losses on derivative instruments before income taxes | (2,974) | 0 | 0
Income tax benefit | 714 | 0 | 0
Unrealized losses on derivative instruments, net of tax | (2,260) | 0 | 0
Unrealized gains (losses) on investments before income taxes | 0 | 26 | (26)
Income tax (expense) benefit | 0 | (6) | 6
Unrealized gains (losses) on investments, net of tax | 0 | 20 | (20)
Retirement liability adjustment before reclassifications | (10,153) | 20,953 | 9,342
Amounts reclassified to other income, net | (98) | 574 | 1,167
Retirement liability adjustment before income taxes | (10,251) | 21,527 | 10,509
Income tax benefit (expense) | 2,202 | (5,119) | (2,508)
Retirement liability adjustment, net of tax | (8,049) | 16,408 | 8,001
Other comprehensive income (loss) | 7,452 | (29,707) | 6,078
Comprehensive income | $ 649,686 | $ 678,048 | $ 698,921

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