Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%	35.00%	21.00%	35.00%
Increase (decrease) resulting from:
Tax exempt interest	(2.60%)	(6.40%)	(3.60%)	(6.40%)
Tax exempt income on bank owned life insurance	(0.80%)	(1.60%)	(1.00%)	(1.90%)
Effective Income Tax Rate Reconciliation, Captive Insurance Premium Income, Percent	(0.80%)	0.00%	(0.90%)	0.00%
Other, net	0.00%	(1.90%)	0.30%	(0.90%)
Effective tax rate	16.80%	25.10%	15.80%	25.80%