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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2024
Income Tax Disclosure [Abstract]  
Reconciliation Between Federal Statutory Rate and Effective Income Tax Rate
The reconciliation between the Federal Statutory Rate and the effective income tax rate for the three months ended March 31, 2024 and 2023 is as follows:
Three months ended March 31,
20242023
United States Federal Statutory Rate21.0 %21.0 %
State income taxes (net of Federal benefits) 13.1 0.1 
Foreign income taxes9.6 20.2 
Impact of subsidiary employee stock options1.7 (2.3)
Non-deductible acquisition costs3.0 — 
Utilization of tax credits(20.6)(4.0)
Non-recognition of various carryforwards at subsidiaries35.5 30.6 
United States tax on foreign income(0.9)10.1 
Impairment expense13.4 — 
Other2.3 5.4 
Effective income tax rate78.1 %81.1 %