Net Investment in Direct Financing Lease (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Lease Terms	The lease has a 15 year term with no renewal options. According to the terms of the lease, the lessee has an obligation to purchase the property underlying the lease in either year seven (7), ten (10) or fifteen (15) at predetermined prices for those years as provided in the lease. The structure of the minimum lease payments and the purchase prices as provided in the lease provide an inducement to the lessee to purchase the property in year seven (7).
Sale Leaseback Transaction, Amount Due under Financing Arrangement	$ 4,591,000	$ 4,699,000
Interest Portion of Minimum Lease Payments, Sale Leaseback Transactions	830,000	928,000
Minimum Lease Payments, Sale Leaseback Transactions	$ 3,761,000	$ 3,771,000