Summary of Significant Accounting Policies (Reconciliation of Net Income (Loss) Reported in Financial Statements and Federal Tax Return) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Net income per financial statements	$ 2,808	$ 2,156
Adjustment to depreciation expense	227	395
Provision for losses and doubtful accounts		(3)
Adjustments to revenues / other expenses	25	(24)
Adjustments to gain on sales of assets	396	673
Income per federal tax return (unaudited)	$ 3,456	$ 3,197