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Federal Income Taxes
3 Months Ended
Mar. 31, 2016
Federal Income Taxes [Abstract]  
Federal Income Taxes



6.  Federal Income Taxes



The effective tax rate is the ratio of tax expense over pre-tax income (loss).  The effective tax rate was 12% and 17% for the three months ended March 31, 2016 and 2015, respectively.  The effective tax rate on pre-tax income from continuing operations was lower than the prevailing corporate federal income tax rate.  Differences in the effective rates and the U.S. statutory rate of 35% were the result of certain tax preferred investment income, separate account dividends-received deductions, foreign tax credits and other tax preference items.