Real Estate Investments (Details) (USD $)	3 Months Ended				3 Months Ended								36 Months Ended		3 Months Ended							0 Months Ended	3 Months Ended		0 Months Ended
	Mar. 31, 2014 property		Mar. 31, 2013 property	Dec. 31, 2013	Mar. 31, 2014 Dollar General [Member]	Mar. 31, 2014 Citizens Bank [Member]	Mar. 31, 2014 Customer Concentration Risk [Member]		Mar. 31, 2014 Geographic Concentration Risk [Member] Texas	Mar. 31, 2014 Columbia, South Carolina [Member] sqft	Mar. 31, 2014 The Woodlands, Texas [Member] sqft	Sep. 30, 2013 The Woodlands, Texas [Member]	Dec. 31, 2013 The Woodlands, Texas [Member] Parent [Member]	Dec. 31, 2013 The Woodlands, Texas [Member] Developer [Member]	Mar. 31, 2014 Leases, Acquired-in-Place [Member]	Mar. 31, 2013 Leases, Acquired-in-Place [Member]	Mar. 31, 2014 Above Market Leases [Member]	Mar. 31, 2013 Above Market Leases [Member]	Mar. 31, 2014 Acquisitions, 2014, Excluding Cole Merger [Member] property land_parcel	Mar. 31, 2013 Acquisitions, 2014, Excluding Cole Merger [Member]	Mar. 31, 2014 Development Activities [Member] land_parcel	Feb. 07, 2014 Cole Merger [Member]	Mar. 31, 2014 Cole Merger [Member]	Mar. 31, 2013 Cole Merger [Member]	Jun. 28, 2013 GE Capital Portfolio [Member] Direct Financing Lease [Member] property
Business Acquisition [Line Items]
Number of properties acquired	215		112																215						47
Number of land parcels acquired																			5		5
Business combination, consideration transferred																			$ 936,100,000			$ 7,467,643,000
Land	133,903,000		74,700,000
Buildings, fixtures and improvements	694,935,000		291,664,000
Total tangible assets	828,838,000		366,364,000
Acquired intangible assets:															120,421,000	45,223,000	11,559,000	0
Below-market leases	1,156,000		0
Fair value adjustment of assumed notes payable	(23,589,000)		0
Total purchase price of assets acquired, net	936,073,000		411,587,000
Notes payable assumed	263,217,000		0
Cash paid for acquired real estate investments	672,856,000		411,587,000
Merger and other transaction related	222,192,000		137,769,000																11,900,000	10,300,000			222,200,000	137,800,000
Pro forma revenues	413,780,000		44,330,000
Pro forma net income (loss) attributable to stockholders	(20,374,000)		6,056,000
Future Minimum Payments, April 1, 2014 - December 31, 2014	921,815,000
Future Minimum Direct Financing Lease Payments, April 1, 2014 - December 31, 2014	3,802,000	[1]
Future Minimum Payments, 2015	1,152,446,000
Future Minimum Direct Financing Lease Payments, 2015	4,757,000	[1]
Future Minimum Payments, 2016	1,127,440,000
Future Minimum Direct Financing Lease Payments, 2016	4,674,000	[1]
Future Minimum Payments, 2017	1,075,967,000
Future Minimum Payments, 2018	1,021,150,000
Future Minimum Direct Financing Lease Payments, 2018	3,183,000	[1]
Future Minimum Payments, Thereafter	7,251,560,000
Future Minimum Direct Financing Lease Payments, Thereafter	10,052,000	[1]
Future Minimum Payments, Total	12,550,378,000
Future Minimum Direct Financing Lease Payments, Total	30,741,000	[1]
Future minimum lease payments receivable	31,001,000			33,729,000
Unguaranteed residual value of property	47,089,000			46,172,000
Unearned income	(12,367,000)			(13,789,000)
Investment in direct financing leases, net	65,723,000			66,112,000
Estimated cost to complete construction																					7,900,000
Land	3,226,615,000			1,378,865,000																	4,600,000
Number of square feet										450,000	150,000
Investment amount, total										22,033,000	33,987,000
Property investment, amount										20,115,000	12,322,000
Interest costs capitalized										45,000	37,000
Remaining investment amount										1,918,000	21,665,000
Proceeds from senior corporate credit facility											17,000,000
Equity contributions percentage													90.00%	10.00%
Cost overruns percentage split											50.00%
Percentage of square footage leased												95.00%
Concentration risk, percentage					12.00%	12.00%	10.00%	[2]	12.20%
Future Minimum Direct Financing Lease Payments, 2017	$ 4,273,000	[1]

[1] properties are subject to direct financing leases and, therefore, 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.

[2] 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.