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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2018
Income Taxes [Abstract]
Income Taxes	15. Income Taxes Our effective tax rate was 20% for the first quarter of 2018 as compared to 31.7% for the same period in 2017. The decrease in the effective tax rate was due primarily to the lower statutory rate from the enactment of the TCJA on December 22, 2017. The rates varied from the statutory rate primarily due to the amount of tax exempt income in relation to pretax income.