Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($) security	Dec. 31, 2013 USD ($)
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale securities amortized cost	$ 373,376	$ 351,068
Available for sale securities amortized cost	373,376
Securities available for sale and held to maturity pledged as collateral, fair value	346,100	350,500
Credit-related impairment losses recognized in earnings	0	$ 0	$ 3,489
Amortized cost of callable debt securities	139,059
Fair value of callable debt securities	$ 134,685
Number of securities in a continuous unrealized loss position total | security	26	15
Trust preferred securities pooled issuers on nonaccrual status credit-related impairment losses first security	$ 2,800
Trust preferred securities pooled issuers on nonaccrual status credit-related impairment losses second security	717
Available for sale securities	$ 375,044	$ 357,662
Proceeds from sales			$ 547
Minimum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Callable debt securities, maturity period	2 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	21 years
Callable debt securities, call feature period	6 years
Individual name issuer trust preferred debt securities [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale securities amortized cost	$ 29,815	$ 30,753
Available for sale securities amortized cost	$ 29,815
Number of securities in a continuous unrealized loss position total | security	10	11
Securities in continuous unrealized loss position, number of companies issuing securities | security	7
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 10,900
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	(1,700)
Available for sale securities	$ 25,138	$ 25,774