Real Estate Investments (Details) (USD $)	3 Months Ended				6 Months Ended					3 Months Ended			6 Months Ended													3 Months Ended	6 Months Ended		6 Months Ended
	Jun. 30, 2013 property		Jun. 30, 2012 property		Jun. 30, 2013 property		Jun. 30, 2012 property		Dec. 31, 2012	Jun. 30, 2013 Leases, Acquired-in-Place [Member]		Jun. 30, 2012 Leases, Acquired-in-Place [Member]	Jun. 30, 2013 Leases, Acquired-in-Place [Member]		Jun. 30, 2012 Leases, Acquired-in-Place [Member]	Jun. 30, 2012 MICHIGAN	Jun. 30, 2012 NEW YORK	Jun. 30, 2012 Dollar General [Member]	Jun. 30, 2012 Citizens Bank [Member]	Jun. 30, 2012 FedEx [Member]	Jun. 30, 2012 Walgreens [Member]	Jun. 30, 2013 Geographic Concentration Risk [Member]		Jun. 30, 2013 Customer Concentration Risk [Member]		Jun. 30, 2013 GE Capital Portfolio [Member]	Jun. 30, 2013 GE Capital Portfolio [Member] property	Jun. 27, 2013 GE Capital Portfolio [Member]	Jun. 30, 2013 Direct Financing Lease [Member] GE Capital Portfolio [Member] property
Entity Wide Revenue, Major State, Percentage																10.70%	10.50%
Business Acquisition, Purchase Price Allocation, Land Acquired in Period	$ 206,282,000	[1]	$ 57,161,000		$ 256,463,000	[1]	$ 84,268,000																			$ 193,100,000
Business Acquisition, Purchase Price Allocation, Buildings, Fixtures and Improvements Acquired in Period	521,765,000	[1]	219,869,000		709,374,000	[1]	372,933,000																			450,500,000
Business Acquisition, Purchase Price Allocation, Tangible Assets Acquired in Period	728,047,000	[1]	277,030,000		965,837,000	[1]	457,201,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets Acquired in Period										76,986,000	[1]	36,927,000	107,213,000	[1]	61,175,000											62,900,000
Business Acquisition, Purchase Price Allocation, Assets Acquired in Period, Net	805,033,000	[1]	313,957,000		1,073,050,000	[1]	518,376,000
OP units issued to acquire real estate investment	0	[1]	(6,352,000)		0	[1]	(6,352,000)
Payments to Acquire Real Estate	805,033,000	[1],[2]	307,605,000	[1],[2]	1,073,050,000	[1],[2]	512,024,000	[1],[2]
Number of Properties Acquired	433	[1]	116		481	[1]	170																				447		47
Investment in direct financing leases, net	67,518,000				67,518,000				0
Real Estate Investment, Aggregate Purchase Price																												773,971,451.000
Real Estate Investment, Purchase Price Allocation, Direct Financing Leases																										67,500,000
Costs of Real Estate Services and Land Sales	15,144,000		7,814,000		20,726,000		12,599,000
Merger and other transaction related	4,680,000		20,000		142,449,000		20,000
Business Acquisition, Pro Forma Revenue	56,941,000		27,019,000		113,882,000		59,136,000
Business Acquisition, Pro Forma Net Income (Loss)	(30,458,000)		(2,393,000)		(18,929,000)		(2,782,000)
Future Minimum Payments, July 1, 2013 - December 31, 2013	106,624,000				106,624,000
Future MinimumDirect Financing Lease Payments, July 1, 2013 - December 31, 2013	2,508,000	[3]			2,508,000	[3]
Future Minimum Payments, 2014	210,551,000				210,551,000
Future Minimum Direct Financing Lease Payments, 2014	5,105,000	[3]			5,105,000	[3]
Future Minimum Payments, 2015	207,318,000				207,318,000
Future Minimum Direct Financing Lease Payments, 2015	5,019,000	[3]			5,019,000	[3]
Future Minimum Payments, 2016	202,300,000				202,300,000
Future Minimum Direct Financing Lease Payments, 2016	4,971,000	[3]			4,971,000	[3]
Future Minimum Payments, 2017	192,725,000				192,725,000
Future Minimum Direct Financing Lease Payments, 2017	4,603,000	[3]			4,603,000	[3]
Future Minimum Payments, Thereafter	1,262,001,000				1,262,001,000
Future Minimum Direct Financing Lease Payments, Thereafter	15,241,000	[3]			15,241,000	[3]
Future Minimum Payments, Total	2,181,519,000				2,181,519,000
Future Minimum Direct Financing Lease Payments, Total	37,447,000	[3]			37,447,000	[3]
Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property	48,751,000				48,751,000
Capital Leases, Net Investment in Direct Financing Leases, Deferred Income	$ (18,680,000)				$ (18,680,000)
Concentration Risk, Percentage																		14.40%	14.80%	19.90%	0.00%	10.00%	[4],[5]	10.00%	[4]

[1] Excludes 47 properties comprised of $67.5 million of net investments subject to direct financing leases

[2]

[3] 47 properties are subject to direct financing leases and, therefore, for accounting purposes, revenue is recognized as direct financing lease income on the discounted cash flows of the lease payments. Amounts reflected are the cash rent on these respective properties.

[4] The tenants' annualized rental income was not greater than 10% of total consolidated annualized rental income for all portfolio properties as of the period specified.

[5] * The annualized rental income from the state was not greater than 10% of total consolidated annualized rental income for all portfolio properties as of the period specified.