Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized loss on investment securities:
Unrealized gain (loss) on investment securities, Before-Tax Amount		$ (1,355)	$ (719)	$ 1,173
Defined benefit pension plan adjustments:
Net actuarial gain (loss), Before-Tax Amount		110	5	(1,710)
Amortization of prior service cost, Before-Tax Amount	[1]	31	31	31
Amortization of actuarial loss, Before-Tax Amount	[1]	221	201	105
Net change, Before-Tax Amount		362	237	(1,574)
Other Comprehensive Income (Loss), Before-Tax Amount		(993)	(482)	(401)
Unrealized gain (loss) on investment securities, Income Tax (Provision) Benefit		515	283	(453)
Net actuarial gain (loss), Income Tax (Provision) Benefit		(42)	(15)	662
Amortization of prior service cost, Income Tax (Provision) Benefit	[1]	(12)	(12)	(12)
Amortization of actuarial loss, Income Tax (Provision) Benefit	[1]	(82)	(76)	(41)
Net change, Income Tax (Provision) Benefit		(136)	(103)	609
Other Comprehensive Income (Loss), Income Tax (Provision) Benefit		379	180	156
Unrealized gain (loss) on investment securities, Net-of-Tax Amount		(840)	(436)	720
Net actuarial gain (loss), Net-of-Tax Amount		68	(10)	(1,048)
Amortization of prior service cost, Net-of-Tax Amount	[1]	19	19	19
Amortization of actuarial loss, Net-of-Tax Amount	[1]	139	125	64
Net change, Net-of-Tax Amount		226	134	(965)
OTHER COMPREHENSIVE LOSS, NET OF TAX		$ (614)	$ (302)	$ (245)

[1] Included in net periodic pension cost as described in Note 11 - "Employee Benefits and Deferred Compensation Plans"