Income Taxes	9 Months Ended
Sep. 30, 2017
Income Taxes [Abstract]
Income Taxes	15. Income Taxes Our effective income tax rate for the nine months ended September 30, 2017 and 2016 was -52.7% and 30.5%, respectively. The rate for 2017 varied from the statutory tax rate primarily due to a correction of an immaterial error in prior years’ deferred tax on bond premium amortization, partially offset by the amount of tax exempt income in relation to total pre-tax income. The rate for 2016 varied from the statutory tax rate primarily due to the amount of tax exempt income in relation to total pre-tax income.

Income Taxes

9 Months Ended

Sep. 30, 2017

15. Income Taxes

Our effective income tax rate for the nine months ended September 30, 2017 and 2016 was -52.7% and 30.5%, respectively. The rate for 2017 varied from the statutory tax rate primarily due to a correction of an immaterial error in prior years’ deferred tax on bond premium amortization, partially offset by the amount of tax exempt income in relation to total pre-tax income. The rate for 2016 varied from the statutory tax rate primarily due to the amount of tax exempt income in relation to total pre-tax income.