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Income taxes - Schedule of Current and Deferred Income Tax (Benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Current: |  |  |
U.S. federal tax | $ 6,967 | $ 18,862 | $ 47,880
State and local tax | 2,137 | 8,068 | 18,331
Non-U.S. operations | 937 | 1,129 | 258
Total Current | 10,041 | 28,059 | 66,469
Deferred: |  |  |
U.S. federal tax | 5,207 | (10,420) | (1,745)
State and local tax | 919 | (4,538) | 790
Non-U.S. operations | 331 | 343 | 163
Total Deferred | 6,457 | (14,615) | (792)
Total income taxes | $ 16,498 | $ 13,444 | $ 65,677

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