Income Taxes (Schedule of Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Asset
Net operating loss and tax credit carryforward	$ 10,421,000	$ 11,250,000
Allowance for loan losses	5,416,000	5,318,000
Net unrealized losses on AFS securities		4,882,000
Deferred Tax Liabilities, Unrealized Gains on Trading Securities	(890,000)	0
Pension and other benefits	4,492,000	3,881,000
Net unrealized losses on derivative instruments	1,656,000	1,215,000
Deferred compensation and benefits	919,000	927,000
Other		353,000
Total	22,904,000	27,826,000
Liability
Depreciation	(3,053,000)	(2,913,000)
Deferred loan origination fees	(2,119,000)	(1,860,000)
Other	19,000
Total	(6,081,000)	(4,773,000)
Valuation allowance on deferred tax assets	0	0
Net deferred tax assets	$ 16,823,000	$ 23,053,000