Income Taxes (Schedule of Net Deferred Tax Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets:
Allowance for Loan Losses	$ 3,645	$ 5,269
Unrealized Loss on Securities	665	3,456
Deferred Compensation and Employee Benefits	702	1,146
Other-than-temporary Impairment	243	377
Accrued Expenses	645	956
Business Combination Fair Value Adjustments	1,041	2,838
Pension and Postretirement Plans	100	67
Non-Accrual Loan Interest Income	152	158
Net Operating Loss Carryforward		196
Unused Tax Credits		86
Other	302	472
Total Deferred Tax Assets	7,495	15,021
Deferred Tax Liabilities:
Depreciation	(1,309)	(1,612)
Leasing Activities, Net	(7,343)	(9,845)
FHLB Stock Dividends	(196)	(304)
Prepaid Expenses	(368)	(461)
Intangibles	(597)	(1,113)
Deferred Loan Fees	(483)	(691)
Mortgage Servicing Rights	(133)	(231)
General Business Tax Credits		(235)
Other	(1,098)	(1,692)
Total Deferred Tax Liabilities	(11,527)	(16,184)
Valuation Allowance	0	0
Net Deferred Tax Liability	$ (4,032)	$ (1,163)