Mergers and Acquisitions (Details) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended						8 Months Ended	0 Months Ended						6 Months Ended	0 Months Ended							3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended				6 Months Ended	0 Months Ended			0 Months Ended						6 Months Ended	0 Months Ended						6 Months Ended
	Aug. 08, 2013 Inland Portfolio [Member] company	Jun. 30, 2014 Series F Preferred Stock [Member]	Jun. 30, 2014 Common Stock [Member]	May 20, 2014 Common Stock [Member] Cole Credit Property Trust, Inc. [Member]	May 20, 2014 Common Stock [Member] Cole Credit Property Trust, Inc. [Member]	May 16, 2014 Red Lobster Portfolio [Member]	Jul. 28, 2014 Red Lobster Portfolio [Member] Subsequent Event [Member] property	May 16, 2014 Red Lobster Portfolio [Member] Weighted Average [Member]	May 16, 2014 Red Lobster Portfolio [Member] Scenario, Plan [Member] property	Jul. 28, 2014 Red Lobster Portfolio [Member] Scenario, Plan [Member] Subsequent Event [Member] property	Feb. 28, 2013 ARCP Merger [Member] Member Units [Member]	Nov. 05, 2013 CapLease [Member]		Jun. 30, 2014 CapLease [Member]	Nov. 05, 2013 CapLease [Member] Common Stock [Member]	Nov. 05, 2013 CapLease [Member] Preferred Stock [Member]	Nov. 05, 2013 CapLease [Member] Member Units [Member]	Jan. 03, 2014 ARCT IV [Member] Common Stock [Member]	Jan. 03, 2014 ARCT IV [Member] Preferred Stock [Member] Series F Preferred Stock [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member]	Jun. 30, 2014 ARCT IV [Member] Member Units [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member] American Realty Capital Trust IV, Inc. [Member]	Feb. 28, 2013 ARCT IV [Member] Member Units [Member] Contribution and Exchange Agreement [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member] Series F Preferred Stock [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member] Class B Units [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member] Class B Units [Member] American Realty Capital Trust IV, Inc. [Member]	Oct. 03, 2013 Fortress Investment Group LLC Portfolio [Member]	Jul. 24, 2013 Fortress Investment Group LLC Portfolio [Member] property	Jun. 30, 2014 Fortress Investment Group LLC Portfolio [Member] property	Jun. 30, 2014 Fortress Investment Group LLC Portfolio [Member] property	Jun. 30, 2014 Fortress Investment Group LLC Portfolio [Member]	Jul. 24, 2013 Fortress Investment Group LLC Portfolio [Member] Scenario, Plan [Member] property	Feb. 07, 2014 Cole Merger [Member]	Feb. 07, 2014 Cole Merger [Member] Common Stock [Member]	Feb. 07, 2014 Cole Merger [Member] Common Stock [Member] Executive Officer [Member]	Jun. 30, 2014 Inland American Real Estate Trust, Inc. [Member] property	May 19, 2014 Cole Credit Property Trust, Inc. [Member]	May 19, 2014 Cole Credit Property Trust, Inc. [Member] Common Stock [Member]	May 19, 2014 Cole Credit Property Trust, Inc. [Member] Common Stock [Member]	Jan. 03, 2014 ARCT IV [Member] Member Units [Member]	Jan. 03, 2014 American Realty Capital Trust IV, Operating Partnership [Member] ARCT IV [Member] Member Units [Member]	Jan. 03, 2014 American Realty Capital Trust IV, Operating Partnership [Member] ARCT IV [Member] Member Units [Member] Special Limited Partner [Member]	Jan. 03, 2014 American Realty Capital Trust IV, Operating Partnership [Member] ARCT IV [Member] Member Units [Member] Series F Preferred Stock [Member]	Jan. 03, 2014 American Realty Capital Trust IV, American Realty Capital Trust IV, Operating Partnership, American Realty Capital Trust IV, Special Limited Partner, and American Realty Capital Trust IV Advisor [Member] ARCT IV [Member] Member Units [Member] Class B Units [Member]	Feb. 28, 2013 American Realty Capital III Special Limited Partnership, LLC [Member] ARCP Merger [Member] Member Units [Member]	Jun. 30, 2014 American Realty Capital III Special Limited Partnership, LLC [Member] ARCP Merger [Member] Member Units [Member]	Jan. 03, 2014 American Realty Capital Advisors III LLC [Member] ARCT IV [Member] Member Units [Member]	Jan. 03, 2014 American Realty Capital Real Estate Partners, LLC [Member] ARCT IV [Member] Member Units [Member]	Jan. 03, 2014 American Realty Capital Real Estate Partners, LLC [Member] ARCT IV [Member] Member Units [Member] Class B Units [Member]	Aug. 08, 2013 ARCP Inland Portfolio [Member] Inland American Real Estate Trust, Inc. [Member]	Aug. 08, 2013 ARCP Inland Portfolio [Member] Inland American Real Estate Trust, Inc. [Member] Inland Portfolio [Member] property	Aug. 08, 2013 ARCP Inland Portfolio [Member] Inland American Real Estate Trust, Inc. [Member] Scenario, Plan [Member] company	Jun. 30, 2014 ARCP Inland Portfolio [Member] Inland American Real Estate Trust, Inc. [Member] Scenario, Plan [Member] property
Business Acquisition [Line Items]
Convertible stock issued during period, shares											95.00%
Business combination, consideration transferred, amount per share											$ 12.00						$ 8.50			$ 9.00														$ 13.82			$ 7.25
Payments to acquire businesses, gross											$ 350,000,000	$ 920,697,000	[1]	$ 920,697,000			$ 920,700,000			$ 650,900,000													$ 181,775,000	$ 181,800,000														$ 750,000
Business combination, acquiree shares exchanged for cash											29,200,000
Percentage of shares outstanding											16.50%
Business combination, acquiree shares equivalent of acquirer shares											27,700,000
Business acquisition, equity interest issued or issuable, number of shares											140,700,000							36,900,000						42,200,000	1,200,000									520,800,000	400,000					600,000	42,200,000	2,800,000	700,000		7,300,000				100,000
Related party transaction, cumulative capital investment return, threshold percentage																							6.00%
Business combination, acquiree shares exchanged for acquirer shares											148,100,000
Business combination, consideration transferred	501,000,000					1,600,000,000																					200,300,000			400,900,000	601,200,000	972,500,000	7,484,255,000			288,200,000	73,200,000													2,300,000,000
Units minimum holding period																					2 years																									1 year
Class of warrant or right, value received by each warrant or right															$ 8.50	$ 25.00	$ 8.50
Preferred stock, dividend rate, percentage		6.70%																						6.70%
Business acquisition, equity interest issued or issuable, per share conversion rate																		$ 0.5190	$ 0.5937	$ 0.5190				$ 0.5937		$ 2.3961								$ 1.0929								$ 22.50		$ 2.3961
Related party transaction, cumulative capital investment return																																															358,300,000
Subordinated distributions of net sale proceeds																																									63,200,000
Business acquisition, equity interest issued or issuable, value assigned																																										$ 78,200,000
Conversion of stock, shares converted																						6,700,000
Number of real estate properties																																																			33
Number of properties acquired	10						492		500	29																			41	79		196				32																67	1
Number of businesses acquired, allocated and assigned																												120
Business acquisition, percentage of voting interests acquired																																		98.00%
Percent of voting interests that received cash																																		2.00%
Shares issued (in shares)			662,305,318	13,457,874																															2,800,000
Business combination, equity interest in acquiree, shares																																						7,735,069
Business combination, step acquisition, equity interest in acquiree, including subsequent acquisition, percentage					90.00%																																		77.00%
Number of shares greater than 90% of voting interest acquired				1
Number of Purchase Leasebacks									521
Percentage of leases, 25 year term						95.00%
Lessor leasing arrangements, operating leases, term of contract						25 years		24 years

[1] As reported in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.