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Income Taxes
 9 Months Ended
Sep. 30, 2023
Income Tax Disclosure [Abstract]  
Income Taxes
9. Income Taxes
Our income tax provision (benefit) and effective income tax rates, including the effects of period-specific events, were:
  
Three months ended
September 30,
Nine months ended
September 30,
(dollars in thousands)
2023
2022
2023
2022
Income tax provision (benefit)$9,069 $(1,576)$(5,032)$(5,993)
Effective income tax rate50.1 %13.2 %58.4 %19.9 %
The increases in our effective income tax rate for the three and nine months ended September 30, 2023, when compared to the same periods in 2022 were primarily attributable to unfavorable impact of non-deductible Security Incident accruals. See Note 8 to these unaudited, condensed consolidated financial statements for additional information about our loss contingency accruals related to the Security Incident.