Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe Company’s effective tax rate for the three and six months ended June 30, 2021 was 12.1% and 11.2%, compared with 17.2% and 17.0% for the three and six months ended June 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 June 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 June 30, 2021 and December 31, 2020.