Investment Securities (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Investment [Line Items]
Fair value of investments reported at less than historical cost	$ 72,464,000		$ 72,464,000		$ 206,914,000
Percentage of Bank portfolio	19.00%		19.00%		55.80%
Securities pledged as collateral	$ 2,900,000		$ 2,900,000		$ 0
Proceeds from sales of securities, available for sale	5,200,000	$ 14,400,000	29,939,000	$ 57,689,000
Gross realized gain on sale of securities	110,000	485,000	977,000	748,000
Gross realized losses on sale of securities	1,000	$ 79,000	2,000	82,000
Other than temporary impairment losses investments available for sale securities			0	$ 0
Pooled Trust Preferred Security [Member]
Investment [Line Items]
Current par balance	3,000,000		3,000,000
Original Par	$ 3,000,000		$ 3,000,000