Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,100,000
Deferred Tax Assets, Gross	20,827,000	$ 21,597,000
Valuation allowance	1,341,000	605,000
Federal Income Tax Expense on Securities Transactions	326,000	$ 255,000	$ 139,000
Partnership investment
Valuation Allowance [Line Items]
Deferred Tax Assets, Gross	$ 3,800,000