Equity Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended									3 Months Ended	6 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended				9 Months Ended					9 Months Ended					9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Cole Merger [Member]	Jun. 30, 2014 Equity Plan [Member]	Jun. 30, 2014 Director Stock Plan [Member] Director [Member]	Jun. 30, 2014 Restricted Stock [Member] Equity Plan [Member]	Jun. 30, 2013 Restricted Stock [Member] Equity Plan [Member]	Jun. 30, 2014 Restricted Stock [Member] Equity Plan [Member]	Jun. 30, 2013 Restricted Stock [Member] Equity Plan [Member]	Jun. 30, 2014 Restricted Stock [Member] Equity Plan [Member] Former Manager [Member]	Jun. 30, 2014 Restricted Stock [Member] Director Stock Plan [Member]	Jun. 30, 2014 Restricted Stock [Member] Director Stock Plan [Member] Director [Member]	Jun. 30, 2014 Restricted Stock [Member] Director Stock Plan [Member] Director [Member] Year One [Member]	Jun. 30, 2014 Restricted Stock [Member] Director Stock Plan [Member] Director [Member] Year Two [Member]	Jun. 30, 2014 Restricted Stock [Member] Director Stock Plan [Member] Director [Member] Year Three [Member]	Jun. 30, 2014 Restricted Stock [Member] Restricted Share Plan [Member] Director [Member] ARCT IV [Member]	Jun. 30, 2013 Performance Shares [Member] Multi-year Outperformance Plan [Member]	Jun. 30, 2014 Performance Shares [Member] Multi-year Outperformance Plan [Member]	Jun. 30, 2013 Performance Shares [Member] Multi-year Outperformance Plan [Member]	Dec. 11, 2012 Performance Shares [Member] Multi-year Outperformance Plan [Member] Former Manager [Member]	Jun. 30, 2014 Performance Shares [Member] Multi-year Outperformance Plan [Member] Merger Related Costs [Member]	Oct. 21, 2013 Performance Shares [Member] New Multi-Year Outperformance Plan [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member]	Oct. 21, 2013 Performance Shares [Member] New Multi-Year Outperformance Plan [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Performance Period [Member]		Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Performance Period [Member] Former Manager [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Performance Period [Member] Minimum [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Performance Period [Member] Maximum [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Annual Period [Member]		Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Annual Period [Member] Former Manager [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Annual Period [Member] Minimum [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Annual Period [Member] Maximum [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Interim Period [Member]		Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Interim Period [Member] Former Manager [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Interim Period [Member] Minimum [Member]	Jun. 30, 2014 Performance Shares [Member] New Multi-Year Outperformance Plan [Member] Interim Period [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum authorized amount as a percentage of shares authorized						10.00%
Share-based compensation arrangement by share-based payment award, shares issued in period						6,715,197	60,854
Restricted share vesting period														3 years				5 years
Share-based compensation arrangement by share-based payment award, periodic vesting percentage															34.00%	33.00%	33.00%	20.00%									33.30%
Number of shares authorized, in shares														99,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, automatic grant																		1,333
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Restricted Common Shares, Unvested Beginning Balance										931,442			15,000
Number of Restricted Common Shares, Granted										5,528,224		800,000	42,854									8,241,101
Number of Restricted Common Shares, Vested										(784,894)		(167,400)	(22,202)									(8,241,101)
Number of Restricted Common Shares, Forfeited										(60,456)			0
Number of Restricted Common Shares, Unvested Ending Balance								5,614,316		5,614,316			35,652
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Issue Price, Unvested Beginning Balance										$ 13.82			$ 14.45
Weighted-Average Issue Price, Granted										$ 13.20			$ 13.99
Weighted-Average Issue Price, Vested										$ 12.79			$ 0.00
Weighted-Average Issue Price, Forfeited										$ 0.00			$ 0.00
Weighted-Average Issue Price, Unvested Ending Balance								$ 13.35		$ 13.35			$ 14.11
Equity based compensation	$ 9,338,000	$ 3,458,000	$ 31,848,000	$ 4,339,000	$ 500,000			$ 4,400,000	$ 3,500,000	$ 22,500,000	$ 4,300,000	$ 11,400,000							$ 3,100,000	$ 93,900,000	$ 3,700,000		$ 1,600,000		$ 4,900,000	$ 9,400,000
Share-based compensation arrangement by share-based payment award, performance period																						3 years									3 years					24 months					12 months
Share based compensation, maximum award opportunity																												$ 218,100,000
Performance based award percentage, as percentage of the company's market capitalization																								5.00%
Share-based compensation arrangement by share-based payment award, absolute component, performance target percentage																													21.00%					7.00%					14.00%
Share-based compensation arrangement by share-based payment award, relative component, one hundred percent funding benchmark, performance target percentage																													18.00%	[1]				6.00%	[1]				12.00%	[1]
Share-based compensation arrangement by share-based payment award, relative component, fifty percent funding benchmark, performance target percentage																													0.00%	[1]				0.00%	[1]				0.00%	[1]
Share-based compensation arrangement by share-based payment award, relative component, zero percent funding benchmark, performance target percentage																													0.00%	[1]				0.00%	[1]				0.00%	[1]
Share-based compensation arrangement by share-based payment award, relative component, between fifty and one hundred percent funding benchmark, performance target percentage																																0.00%	18.00%				0.00%	6.00%				0.00%	12.00%
Share-based compensation arrangement by share-based payment award, absolute component threshold percentage																									4.00%	4.00%	4.00%
Share-based compensation arrangement by share-based payment award, relative component threshold percentage																									4.00%	4.00%	4.00%

[1] The “Peer Group” is comprised of the following companies: EPR Properties; Getty Realty Corporation; Lexington Realty Trust; National Retail Properties, Inc.; Realty Income Corporation; and Spirit Realty Capital, Inc.