Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Note 5. Income Taxes ASC 740, Income Taxes, defines the threshold for recognizing the benefits of tax return positions in the financial statements as "more-likely-than-not" to be sustained by the taxing authority. This section also provides guidance on the derecognition, measurement and classification of income tax uncertainties, along with any related interest and penalties, and includes guidance concerning accounting for income tax uncertainties in interim periods. The unrecognized tax benefit related to uncertain tax positions related to state income tax filings was $6.9 million at September 30, 2020 and December 31, 2019, respectively. No change was recorded to the unrecognized tax benefit related to uncertain tax positions in each of the three and nine month periods ended September 30, 2020 and 2019. Pinnacle Financial's policy is to recognize interest and/or penalties related to income tax matters in income tax expense. For both the three and nine months ended September 30, 2020 and 2019, respectively, there were no interest and penalties recorded in the income statement. Pinnacle Financial's effective tax rate for the three and nine months ended September 30, 2020 was 19.3% and 15.2%, respectively, compared to 19.5% and 19.6%, respectively, for the three and nine months ended September 30, 2019. The difference between the effective tax rate and the federal and state income tax statutory rate of 26.14% at September 30, 2020 and 2019 is primarily due to investments in bank qualified municipal securities, tax benefits of Pinnacle Bank's real estate investment trust subsidiary, participation in the Tennessee Community Investment Tax Credit (CITC) program, and tax benefits associated with share-based compensation, bank-owned life insurance and our captive insurance subsidiary, offset in part by the limitation on deductibility of meals and entertainment expense, non-deductible FDIC premiums and non-deductible executive compensation. Income tax expense is also impacted by the vesting of equity-based awards and the exercise of employee stock options, which expense or benefit is recorded as a discrete item as a component of total income tax, the amount of which is dependent upon the change in the grant date fair value and the vest date fair value of the underlying award. Accordingly, for the three and nine months ended September 30, 2020 we recognized excess tax expense of $85,000 and tax benefits of $505,000, respectively, compared to tax benefits of $131,000 and $832,000, respectively, for the three and nine months ended September 30, 2019. For the nine months ended September 30, 2020, income tax expense was also impacted by provision for credit losses, including provision for credit losses resulting from the COVID-19 pandemic, which was recorded as a discrete item as a component of total income tax. Accordingly, we recognized a tax benefit of $22.4 million for the nine months ended September 30, 2020.

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.