Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	4. Income Taxes Income tax expense for the three months ended March 31, 2019 and 2018 has been computed using estimated annual effective tax rates. The prior year’s rate reflects the recomputed income to exclude the Chaucer business. These rates are revised, if necessary, at the end of each successive interim period to reflect current estimates of the annual effective tax rates. The tax provision was comprised of U.S. federal income tax expense of $26.0 million and $8.6 million for the three months ended March 31, 2019 and 2018, respectively. The tax provision recorded in discontinued operations related to the Chaucer business for the three months ended March 31, 2018 was comprised of a $5.9 million U.S. federal income tax expense and a $1.7 million foreign income tax benefit. The Company or its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state jurisdictions, as well as foreign jurisdictions. The Company and its subsidiaries are subject to U.S. federal and state income tax examinations and foreign examinations for years after 2014.

Income Taxes

3 Months Ended

Mar. 31, 2019

4. Income Taxes

Income tax expense for the three months ended March 31, 2019 and 2018 has been computed using estimated annual effective tax rates. The prior year’s rate reflects the recomputed income to exclude the Chaucer business. These rates are revised, if necessary, at the end of each successive interim period to reflect current estimates of the annual effective tax rates.

The tax provision was comprised of U.S. federal income tax expense of $26.0 million and $8.6 million for the three months ended March 31, 2019 and 2018, respectively. The tax provision recorded in discontinued operations related to the Chaucer business for the three months ended March 31, 2018 was comprised of a $5.9 million U.S. federal income tax expense and a $1.7 million foreign income tax benefit.

The Company or its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state jurisdictions, as well as foreign jurisdictions. The Company and its subsidiaries are subject to U.S. federal and state income tax examinations and foreign examinations for years after 2014.