Investment In Direct Financing Lease (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Investment In Direct Financing Lease [Abstract]
2012	$ 2,793,000
2013	2,793,000
2014	2,793,000
2015	2,793,000
2016	2,793,000
Thereafter	694,000
Total minimum obligation	14,659,000
Less unearned interest income	(3,861,000)
Less current portion of direct financing lease	(1,565,000)
Investment in direct financing lease	9,233,000
Interest income of direct financing lease	$ 1,400,000	$ 1,600,000	$ 1,700,000