Securities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Accrued interest receivable	$ 2,800	$ 2,900
Fair value of available for sale and held to maturity securities pledged as collateral	400,000	$ 431,900
Amortized cost of callable debt securities	155,400
Fair value of callable debt securities	$ 151,700
Number of securities in a continuous unrealized loss position total | security	13	41
Unrealized losses of securities in a continuous unrealized loss position total	$ (5,140)	$ (4,900)
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	5	5
Securities in unrealized loss position, number of companies issuing securities | security	4
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 2,000
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	421
Unrealized losses of securities in a continuous unrealized loss position total	$ (2,232)	$ (745)
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	3	3
Unrealized losses of securities in a continuous unrealized loss position total	$ (2,693)	$ (958)
Minimum [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Maturity period of callable debt securities	1 month
Call features of callable debt securities	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Maturity period of callable debt securities	17 years
Call features of callable debt securities	2 years