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Income Taxes
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
We recorded an income tax expense of $1.7 million and an income tax benefit of $2.3 million for the three months ended March 31, 2022 and 2021, respectively. The change is primarily due to improved operational results from both U.S. and foreign operations during the current quarter.
Our income tax benefit or expense is based on an annual effective tax rate forecast, including estimates and assumptions that could change during the year. The application of the accounting requirements for income taxes in interim periods, after consideration of our valuation allowance, causes a significant variation in the typical relationship between income tax expense/benefit and pre-tax accounting income/loss.
As of March 31, 2022, all of Century's U.S. and certain foreign deferred tax assets, net of deferred tax liabilities, continue to be subject to a valuation allowance.