Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe Company’s effective tax rate for the three and nine months ended September 30, 2021 was 16.9% and 4.4%, compared with 13.3% and 15.3% for the three and nine months ended September 30, 2020, respectively. Income tax benefits have not been recorded for losses in jurisdictions where valuation allowances exist against net deferred tax assets. The Company had a full valuation allowance against its net deferred tax assets in the United Kingdom and the United States at September 30, 2021, and a full valuation allowance against its net deferred tax assets in the United States at December 31, 2020. The Company had no uncertain tax positions at both September 30, 2021 and December 31, 2020.