Income taxes	9 Months Ended
Sep. 30, 2021
Income taxes
Income taxes	13. Income taxes The effective tax rate of the Company was 15.3% and 17.7% for the three and nine months ended September 30, 2021 compared to 15.5% and 14.2% for the three and nine months ended September 30, 2020. The nine months ended September 30, 2021 includes a $621 deferred tax adjustment related to prior periods and the Company’s frozen pension plan. Excluding this adjustment, the effective tax rate would be 15.8% for the nine month period ended September 30, 2021, an increase from the year ago period’s 14.2% due to a lower proportion of tax exempt income recognized in 2021 when compared to 2020. Before tax investment tax credits amounted to $276 and $819 for the three and nine months ended September 30, 2021 compared to before tax investment tax credits and other credits of $276 and $821 for those same periods last year.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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