Summary Of Significant Accounting Policies (Reconciliation of Net Income Loss Reported in Financial Statements and Federal Tax Return) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract]
Net income per financial statements	$ 1,886	$ 2,216
Adjustment to depreciation expense	894	1,041
Provision for losses and doubtful accounts	(12)	14
Adjustments to revenues / other expenses	140	118
Adjustments to gain on sales of assets	100	133
Income per federal tax return (unaudited)	$ 3,008	$ 3,522