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Income Taxes
 9 Months Ended
Sep. 30, 2024
Income Tax Disclosure [Abstract]  
Income Taxes
5. Income Taxes
The Company calculates income taxes at the end of each reporting period based on the estimated effective tax rate for the full year, adjusted for any discrete events which are recorded in the period they occur. Cumulative adjustments to the tax provision are recorded in the reporting period in which a change in the estimated annual effective tax rate is determined. The Company’s income tax expense and effective tax rate are presented below:            
Three Months Ended
September 30,		Nine Months Ended
September 30,
(in thousands)2024202320242023
Income tax expense$45,025 $27,999 $107,528 $49,259 
Effective tax rate25.6 %17.5 %24.9 %18.1 %
The increase in the effective income tax rate for the three and nine months ended September 30, 2024 is primarily due to a benefit recorded in the third quarter of 2023 related to the sale of the Company’s RELISTOR royalty asset, which resulted in additional net operating losses becoming available for utilization under Internal Revenue Code Section 382. There was no such comparable amount recorded in 2024.