Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($) security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Held to maturity securities, amortized cost	$ 0		$ 10,415
Held to maturity securities, fair value	0		10,316
Unrealized losses in accumulated other comprehensive income	(11,237)		(28,309)
Securities available for sale and held to maturity pledged as collateral, fair value	431,900		$ 439,700
Amortized cost of callable debt securities	180,400
Fair value of callable debt securities	$ 179,100
Number of securities in a continuous unrealized loss position total | security	41		90
Unrealized losses of securities in a continuous unrealized loss position total	$ 4,900		$ 24,396
Minimum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Callable debt securities, maturity period	4 months
Callable debt securities, call feature period	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Callable debt securities, maturity period	17 years
Callable debt securities, call feature period	2 years
Individual name issuer trust preferred debt securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	5		5
Number of companies issuing securities in continuous unrealized loss position | 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	(161)
Unrealized losses of securities in a continuous unrealized loss position total	$ 745		$ 1,535
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Number of securities in a continuous unrealized loss position total | security	3		8
Unrealized losses of securities in a continuous unrealized loss position total	$ 958		$ 1,777
Adjustments for Change in Accounting Principle [Domain]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Held to maturity securities, amortized cost		$ 10,400
Held to maturity securities, fair value		10,300
Unrealized losses in accumulated other comprehensive income		$ (75)