Income Taxes	6 Months Ended
Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate was 26% and 16% for the six months ended June 30, 2016 and 2015, respectively. For the six months ended June 30, 2016, the effective tax rate differs from the U.S. statutory tax rate of 35% primarily as a result of tax-exempt investment income. For the six months ended June 30, 2015, the effective tax rate differs from the U.S. statutory tax rate of 35% primarily as a result of foreign tax credits for foreign taxes paid and tax-exempt investment income. The Company's recognition of foreign tax credits in 2015 had a favorable impact on its effective tax rate for the six months ended June 30, 2015 of 12%. The increase in the effective tax rate in 2016 compared to 2015 was primarily due to the 2015 impact of foreign tax credits described above, partially offset by an increase in estimated annual earnings attributable to foreign operations that are taxed at a lower rate in 2016 compared to 2015. During the first quarter of 2016, the Internal Revenue Service completed its examination of the Company’s 2012 federal income tax return. There were no adjustments to our income tax liabilities as a result of this examination.

Income Taxes

6 Months Ended

Jun. 30, 2016

The effective tax rate was 26% and 16% for the six months ended June 30, 2016 and 2015, respectively. For the six months ended June 30, 2016, the effective tax rate differs from the U.S. statutory tax rate of 35% primarily as a result of tax-exempt investment income. For the six months ended June 30, 2015, the effective tax rate differs from the U.S. statutory tax rate of 35% primarily as a result of foreign tax credits for foreign taxes paid and tax-exempt investment income. The Company's recognition of foreign tax credits in 2015 had a favorable impact on its effective tax rate for the six months ended June 30, 2015 of 12%. The increase in the effective tax rate in 2016 compared to 2015 was primarily due to the 2015 impact of foreign tax credits described above, partially offset by an increase in estimated annual earnings attributable to foreign operations that are taxed at a lower rate in 2016 compared to 2015.

During the first quarter of 2016, the Internal Revenue Service completed its examination of the Company’s 2012 federal income tax return. There were no adjustments to our income tax liabilities as a result of this examination.