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Taxes
9 Months Ended
Sep. 30, 2017
Taxes [Abstract]  
Taxes
(7) Taxes:
As of September 30, 2017, the Company's calendar years 2016, 2015 and 2014 remain subject to examination by the Internal Revenue Service.

The effective federal tax rate on consolidated income for the third quarter of 2017 was 30.0% compared to 29.0% for the 2016 third quarter.  The effective federal income tax rate differs from the normal statutory rate primarily as a result of tax-exempt investment income.

The effective federal tax rate on consolidated income (loss) for the first nine months of 2017 was 581.0% compared to 33.1% for the 2016 period.  The significant difference between the effective rate and the normal statutory rate was the result of the Company's operating loss through the first nine months of 2017.