Income Taxes Schedule of income tax rate reconciliation (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	1.20%	1.50%	2.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent	0.50%	0.70%	0.80%
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent	0.80%	1.10%	1.50%
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Percent	0.50%	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	(0.20%)	(0.20%)	(1.60%)
Effective Income Tax Rate Reconciliation, Percent	18.20%	17.30%	17.70%