Investment Securities (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Available-For-Sale And Held-To-Maturity Securities [Line Items]
Carrying value of securities pledged		$ 305,840,000	$ 317,220,000
Securities classified as trading		0	0
Net gains	126,000
Transferred From Available-For-Sale to Held-To-Maturity [Member]
Schedule Of Available-For-Sale And Held-To-Maturity Securities [Line Items]
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance		4,150,000
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance, net of tax		$ 2,700,000