CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $)		Total	Affiliated Entity [Member]	Affiliated Entity [Member] Offering Related Costs [Member]	Preferred Stock [Member]	Member Units [Member]	Series D Preferred Stock [Member]	Preferred OP Units [Member]	Convertible Preferred Series C Stock [Member]	Total Stockholders' Equity	Total Stockholders' Equity Preferred Stock [Member]	Total Stockholders' Equity Member Units [Member]	Total Stockholders' Equity Series D Preferred Stock [Member]	Total Stockholders' Equity Preferred OP Units [Member]	Preferred Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Preferred OP Units [Member]	Common Stock [Member]		Common Stock [Member] Member Units [Member]	Common Stock [Member] Convertible Preferred Series C Stock [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Preferred Stock [Member]	Additional Paid-In Capital [Member] Member Units [Member]	Additional Paid-In Capital [Member] Preferred OP Units [Member]	Additional Paid-In Capital [Member] Convertible Preferred Series C Stock [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Preferred Stock [Member]	Accumulated Deficit [Member] Series D Preferred Stock [Member]	Non-Controlling Interests [Member]	Non-Controlling Interests [Member] Member Units [Member]	Non-Controlling Interests [Member] Preferred OP Units [Member]
Beginning balance at Dec. 31, 2011		$ 140,788,000								$ 137,086,000					$ 0			$ 172,000				$ 144,230,000					$ (98,000)	$ (7,218,000)			$ 3,702,000
Beginning balance (shares) at Dec. 31, 2011															0			17,162,016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock (shares)		3,737,500														6,990,328		164,775,688
Issuance of stock		1,912,774,000			9,062,000					1,912,774,000	9,062,000					70,000		1,648,000				1,911,126,000	8,992,000
Excess of ARCT IV Merger considerations over historical cost		(93,421,000)																				(93,421,000)
Offering costs, commissions and dealer manager fees	[1]	(218,431,000)								(218,431,000)												(218,431,000)
Common stock issued through distribution reinvestment plan (shares)																		2,686,141
Common stock issued through distribution reinvestment plan		27,136,000								27,136,000								27,000				27,109,000
Equity-based compensation (shares)																		112,950
Equity-based compensation		1,230,000								1,230,000								1,000				1,229,000
Distributions declared		(75,416,000)								(75,416,000)																		(75,416,000)
Common stock repurchases (shares)																		(183,119)
Common stock repurchases		(1,953,000)								(1,953,000)								(2,000)				(1,951,000)
Noncontrolling interest increase from subsidiary equity issuance						6,352,000																										6,352,000
Contributions from non-controlling interest holders		7,375,000																													7,375,000
Distributions to non-controlling interest holders		(663,000)																													(663,000)
Net loss		(42,237,000)								(41,652,000)																		(41,652,000)			(585,000)
Other comprehensive loss		(3,836,000)								(3,836,000)																	(3,836,000)
Related party expenses			0	211,391,000
Ending balance at Dec. 31, 2012		1,668,760,000								1,652,579,000					70,000			1,846,000				1,778,883,000					(3,934,000)	(124,286,000)			16,181,000
Ending balance (shares) at Dec. 31, 2012															6,990,328			184,553,676
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock (shares)		47,161,562														36,037,691		78,215,719
Issuance of stock		2,153,925,000			360,000					2,153,925,000	360,000					360,000		781,000				2,153,144,000
Excess of ARCT IV Merger considerations over historical cost		(558,089,000)								(558,089,000)												(558,089,000)
Offering costs, commissions and dealer manager fees	[1]	(165,531,000)								(165,531,000)												(165,531,000)
Common stock issued through distribution reinvestment plan (shares)																		940,737
Common stock issued through distribution reinvestment plan		25,564,000								25,564,000								10,000				25,554,000
Equity-based compensation (shares)																		1,004,673
Equity-based compensation		40,662,000								7,962,000								10,000				7,952,000									32,700,000
Distributions declared		(259,468,000)								(259,468,000)																		(259,468,000)
Common stock repurchases (shares)																		(28,319,972)
Common stock repurchases		(358,041,000)								(358,041,000)								(283,000)				(357,758,000)
Noncontrolling interest increase from subsidiary equity issuance						107,771,000																										107,771,000
Contributions from non-controlling interest holders		30,861,000																													30,861,000
Distributions to non-controlling interest holders		(9,014,000)																													(9,014,000)
Net loss		(507,815,000)								(491,499,000)																		(491,499,000)			(16,316,000)
Other comprehensive loss		11,600,000								11,600,000																	11,600,000
Conversion of Units to Stock (shares)															(828,472)			829,629		599,233	1,411,030
Conversion of Units to stock		0				0			17,396,000	17,396,000		5,800,000			(8,000)			8,000		6,000	14,000			5,794,000		17,382,000						(5,800,000)
Equity component of convertible debt		28,559,000								28,559,000												28,559,000
Contribution from the Former Manager		2,313,000								2,313,000												2,313,000
Consideration paid for assets of the Former Manager in excess of carryover basis		0																				2,704,000						(2,704,000)
Non-controlling interests retained in CapLease and Cole Merger		567,000																													567,000
Noncontrolling Interest, Increase from Sale of Parent Equity Interest		1,152,000																													1,152,000
Related party expenses			0	161,796,000
Ending balance at Dec. 31, 2013		2,229,228,000								2,073,430,000					422,000			2,392,000				2,940,907,000					7,666,000	(877,957,000)			155,798,000
Ending balance (shares) at Dec. 31, 2013															42,199,547			239,234,725
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock (shares)		138,000,000																662,305,318	[1]
Issuance of stock	[1]	8,930,263,000								8,930,263,000								6,623,000				8,923,640,000
Equity-based compensation (shares)																		3,433,701
Distributions declared		(819,377,000)								(819,377,000)																		(819,377,000)
Common stock repurchases (shares)		(551,664)
Noncontrolling interest increase from subsidiary equity issuance						152,484,000																										152,484,000
Contributions from non-controlling interest holders		982,000																													982,000
Distributions to non-controlling interest holders		(36,318,000)																													(36,318,000)
Net loss		(1,010,912,000)								(977,185,000)																		(977,185,000)			(33,727,000)
Other comprehensive loss		(4,938,000)								(4,938,000)																	(4,938,000)
Conversion of Units to Stock (shares)																	634,591	1,108,351
Conversion of Units to stock		0						0		16,046,000				12,677,000			6,000	11,000				16,035,000			12,671,000						(16,046,000)		(12,677,000)
Non-controlling interests retained in CapLease and Cole Merger		24,766,000																													24,766,000
Noncontrolling Interest, Increase from Sale of Parent Equity Interest		(8,420,000)																													8,420,000
Issuance of share awards, net (shares)																		(551,664)
Issuance of share awards, net		(7,690,000)								(7,690,000)								(5,000)				(7,685,000)
Equity-based compensation		31,861,000								30,261,000								34,000				30,227,000									1,600,000
Excess tax benefit		4,458,000								4,458,000												4,458,000
Distributions					(98,722,000)		(5,335,000)				(98,722,000)		(5,335,000)																(98,722,000)	(5,335,000)
Related party expenses			203,558,000	2,150,000
Ending balance at Dec. 31, 2014		$ 9,382,330,000								$ 9,153,888,000					$ 428,000			$ 9,055,000				$ 11,920,253,000					$ 2,728,000	$ (2,778,576,000)			$ 228,442,000
Ending balance (shares) at Dec. 31, 2014															42,834,138			905,530,431

[1] Includes $2.2 million, $161.8 million and $211.4 million to affiliates for the years ended December 31, 2014, December 31, 2013, and December 31, 2012, respectively.