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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2021
Income Tax Disclosure [Abstract]  
Income Tax Rate Reconciliation
Income Tax Rate Reconciliation
Three Months Ended March 31,
20212020
Tax provision at U.S. federal statutory rate$63 $72 
Tax-exempt interest(11)(12)
Executive compensation
Increase in deferred tax valuation allowance
Other (4)— 
Provision for income taxes$54 $71