Investment Securities (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Investment [Line Items]
Fair value of investments reported at less than historical cost	$ 77,767,000		$ 77,767,000		$ 206,914,000
Percentage of Bank portfolio	20.70%		20.70%		55.80%
Proceeds from sales of securities, available for sale	$ 13,900,000	$ 6,500,000	$ 24,690,000	$ 43,284,000
Gross realized gain on sale of securities	422,000	109,000	866,000	263,000
Gross realized losses on sale of securities		$ 3,000	0	3,000
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