Mergers and Acquisitions (Detail) (USD $)	0 Months Ended	6 Months Ended				0 Months Ended								9 Months Ended		0 Months Ended
	Aug. 08, 2013 Company	Jun. 30, 2014		Jun. 30, 2013		Mar. 13, 2014	Feb. 28, 2013	Nov. 05, 2013		Jan. 03, 2014	Oct. 03, 2013	Oct. 02, 2013 Property	Jul. 24, 2013 Property	Jun. 30, 2014		Feb. 07, 2014	May 19, 2014	May 20, 2014	May 16, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Common stock, par value		0.01	[1]	0.01										$ 0.01	[1]					$ 0.01	[1]
Inland Portfolio [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 501,000,000
Number of properties acquired	10
Common Stock [Member]
Business Acquisition [Line Items]
Shares issued (in shares)		662,305,318	[1],[2]	63,056,895	[1]
Spinoff Of Multi Tenant Shopping Center Portfolio [Member]
Business Acquisition [Line Items]
Common stock, par value						$ 0.01
Ownership percentage						2500.00%
Spin-off, finalization of documentation period						30 days
Spinoff Of Multi Tenant Shopping Center Portfolio [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Spin-off, shares						$ 10
Spinoff Of Multi Tenant Shopping Center Portfolio [Member] | Op Units [Member]
Business Acquisition [Line Items]
Spin-off, shares						$ 10
ARCP Merger [Member] | Member Units [Member]
Business Acquisition [Line Items]
Convertible stock issued during period, shares							95.00%
Business combination, consideration transferred, amount per share							$ 12.00
Payments to acquire businesses, gross							350,000,000
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
Business combination, acquiree shares exchanged for acquirer shares							148,100,000
ARCP Merger [Member] | American Realty Capital III Special Limited Partnership, LLC [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares							7,300,000
Units Minimum Holding Period		1 year
CapLease [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross								920,697,000	[3]
CapLease [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred, amount per share								$ 8.50
Payments to acquire businesses, gross								920,700,000
Class of warrant or right, value received by each warrant or right								$ 8.50
CapLease [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Class of warrant or right, value received by each warrant or right								$ 8.50
CapLease [Member] | Preferred Stock [Member]
Business Acquisition [Line Items]
Class of warrant or right, value received by each warrant or right								$ 25.00
ARCT IV [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred, amount per share										$ 9.00
Payments to acquire businesses, gross										651,400,000
Business acquisition, equity interest issued or issuable, number of shares										600,000
Units Minimum Holding Period		2 years
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 0.5190
ARCT IV [Member] | Member Units [Member] | Contribution and Exchange Agreement [Member]
Business Acquisition [Line Items]
Related party transaction, cumulative capital investment return, threshold percentage							6.00%
ARCT IV [Member] | Member Units [Member] | ARCT IV [Member]
Business Acquisition [Line Items]
Conversion of Stock, Shares Converted										6,700,000
ARCT IV [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										36,900,000
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 0.5190
ARCT IV [Member] | Series F Preferred Stock [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										42,200,000
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 0.5937
Preferred stock, dividend rate, percentage										6.70%
ARCT IV [Member] | Series F Preferred Stock [Member] | Preferred Stock [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 0.5937
ARCT IV [Member] | Class B Units [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										1,200,000
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 2.3961
ARCT IV [Member] | Class B Units [Member] | Member Units [Member] | ARCT IV [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 2.3961
ARCT IV [Member] | American Realty Capital Trust IV, Operating Partnership [Member] | Member Units [Member]
Business Acquisition [Line Items]
Subordinated distributions of net sale proceeds										63,200,000
ARCT IV [Member] | American Realty Capital Trust IV, Operating Partnership [Member] | Member Units [Member] | Special Limited Partner [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										2,800,000
Business acquisition, equity interest issued or issuable, per share conversion rate										$ 22.50
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned										78,200,000
ARCT IV [Member] | American Realty Capital Trust IV, Operating Partnership [Member] | Series F Preferred Stock [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										700,000
ARCT IV [Member] | American Realty Capital Advisors III LLC [Member] | Member Units [Member]
Business Acquisition [Line Items]
Related party transaction, cumulative capital investment return										358,300,000
ARCT IV [Member] | American Realty Capital Real Estate Partners, LLC [Member] | Member Units [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross										750,000
ARCT IV [Member] | American Realty Capital Real Estate Partners, LLC [Member] | Class B Units [Member] | Member Units [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares										100,000
Fortress Investment Group LLC Portfolio [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred		400,900,000									200,300,000			601,200,000
Number of properties acquired		79										41
Number of businesses acquired, allocated and assigned													120
Fortress Investment Group LLC Portfolio [Member] | Scenario, Plan [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred													972,500,000
Number of properties acquired													196
Cole Merger [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross																181,775,000
Business combination, consideration transferred																7,467,643,000
Cole Merger [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred, amount per share																$ 13.82
Payments to acquire businesses, gross																181,800,000
Business acquisition, equity interest issued or issuable, number of shares																520,800,000
Business acquisition, equity interest issued or issuable, per share conversion rate																$ 1.0929
Business acquisition, percentage of voting interests acquired																98.00%
Percent of voting interests that received cash																2.00%
Cole Merger [Member] | Executive Officer [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable, number of shares																400,000
Shares issued (in shares)																2,800,000
Inland American Real Estate Trust, Inc. [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred		288,200,000
Number of properties acquired		32
Inland American Real Estate Trust, Inc. [Member] | ARCP Inland Portfolio [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred	2,300,000,000
Inland American Real Estate Trust, Inc. [Member] | ARCP Inland Portfolio [Member] | Inland Portfolio [Member]
Business Acquisition [Line Items]
Number of real estate properties	33
Inland American Real Estate Trust, Inc. [Member] | ARCP Inland Portfolio [Member] | Scenario, Plan [Member]
Business Acquisition [Line Items]
Number of properties acquired	67
Cole Credit Property Trust, Inc. [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred, amount per share																	$ 7.25
Business combination, consideration transferred																	73,200,000
Cole Credit Property Trust, Inc. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares issued (in shares)																		13,457,874
Business combination, equity interest in acquiree, shares																	7,735,069
Business combination, step acquisition, equity interest in acquiree, including subsequent acquisition, percentage																	77.00%	90.00%
Number of shares greater than 90% of voting interest acquired																		1
Red Lobster Portfolio [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred																			$ 1,700,000,000
Red Lobster Portfolio [Member] | Scenario, Plan [Member]
Business Acquisition [Line Items]
Number of properties acquired																			500
Number of Purchase Leasebacks																			522

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.

[2] Includes $2.2 million to affiliates of the Former Manager (as defined in Note 1) for the six months ended June 30, 2014.

[3] As reported in the Amended 10-K.