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Income taxes
 9 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Income taxes Income taxes
The estimated effective annual tax rate as of September 30, 2024 and 2023 for the years ended December 31, 2024 and 2023, excluding the impact of discrete adjustments, was 20% and (5)%, respectively. The effective tax rate for the nine months ended September 30, 2024 and 2023 was (38)% and (5)%, respectively. The increase in the estimated effective annual tax rate is primarily due to a change in jurisdictional mix of income and losses. The Company recorded a discrete tax expense of $0.4 million and $0.4 million for the three and nine months ended September 30, 2024, respectively, and $1.0 million and $1.0 million for the three and nine months ended September 30, 2023, respectively. The discrete tax expense in 2024 and 2023 was due to return-to-provision adjustments and share-based compensation activity, which was entirely offset by a valuation allowance charge.
The Company establishes valuation allowances for deferred income tax assets in accordance with U.S. GAAP, which provides that such valuation allowances shall be established unless realization of the income tax benefits is more likely than not. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. At each reporting period, the Company considers the scheduled reversal of deferred tax liabilities and assets, available taxes in carryback periods, tax planning strategies and projected future taxable income in making this assessment.