Summary of Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before-tax amount	$ (3,446)	$ (3,009)
Accumulated other comprehensive income, tax effect	1,172	1,024
Accumulated other comprehensive loss, net of tax	(2,274)	(1,985)
Net Unrealized loss on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before-tax amount	(1,646)	(1,180)
Accumulated other comprehensive income, tax effect	560	402
Accumulated other comprehensive loss, net of tax	(1,086)	(778)
Discount on AFS to HTM Reclassification [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before-tax amount	(8)	(17)
Accumulated other comprehensive income, tax effect	3	6
Accumulated other comprehensive loss, net of tax	(5)	(11)
Unrealized Actuarial Losses-Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before-tax amount	(1,792)	(1,812)
Accumulated other comprehensive income, tax effect	609	616
Accumulated other comprehensive loss, net of tax	$ (1,183)	$ (1,196)