Income Taxes (Reconciliation of Federal Income Tax Rate to Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Federal statutory rate	21.00%	35.00%
Tax-exempt income on securities and loans	(1.60%)	(2.80%)
Tax-exempt BOLI income	(1.80%)	(3.40%)
State income tax, net of federal tax benefit	4.90%	4.70%
Tax credits	(2.10%)	(3.40%)
Tax Reform impact	0.00%	26.40%
Other	0.20%	0.30%
Effective Income Tax Rate Reconciliation, Percent, Total	20.60%	56.80%