Subsequent Events (Details) (USD $)	3 Months Ended			0 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013 properties	Dec. 31, 2013	Apr. 21, 2014 Subsequent Event [Member] properties	Apr. 02, 2014 Subsequent Event [Member] properties	Jun. 30, 2014 Subsequent Event [Member]	Apr. 03, 2014 Subsequent Event [Member]
Subsequent Event [Line Items]
number of properties sold		5			4
Proceeds from Sale of Property, Plant, and Equipment					$ 46,100,000
Net Investment in Direct Financing and Sales Type Leases	242,905,000		242,212,000				45,900,000
originalacquisitioncost							41,500,000
Gain on sale or acquisition of real estate						200,000
Number of properties acquired (in properties)				11
Payments to Acquire Productive Assets	68,500,000			117,700,000
Noncash or Part Noncash Acquisition, Debt Assumed				$ 90,300,000