Equity Transactions, Sale of Common Stock (Details) - USD ($)		1 Months Ended		3 Months Ended							12 Months Ended
	Mar. 30, 2016	Sep. 30, 2016	Nov. 30, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Common Stock Issued	6,037,500	3,737,500	3,737,500	19,498,000	620,828,000	485,000,000	6,037,500	608,100,000	26,200,000	342,011,000
Weighted Average Sales Price		$ 76,810		$ 75,900	$ 76,810	$ 71,860		$ 68,000	$ 65,150	$ 63,940	$ 75,900
Net Proceeds (in Millions)				$ 1,500	$ 47,100	$ 34,400		$ 40,800	$ 1,700	$ 21,500
Series A-1 Preferred OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)											20,691,000	41,116,000
Series A-1 Preferred OP Units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued											2,439
Conversion of Common OP Units to common stock (in shares)											50,458,000	100,277,000
Conversion of Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)											104,106		99,851
Conversion of Common OP Units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued											1,000
Conversion of Common OP Units to common stock (in shares)											104,106
Series A-4 Preferred Op Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)											120,906,000	114,414,000
Series A-4 Preferred Op Units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued											444.4
Conversion of Common OP Units to common stock (in shares)											53,733,000	50,848,000
Series A-4 Preferred Stock [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)											385,242,000	231,093,000
Series A-4 Preferred Stock [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued											444.4
Conversion of Common OP Units to common stock (in shares)											171,218,000	102,708,000
Series C preferred OP units [Domain]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)											7,043,000	0
Series C preferred OP units [Domain] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Issued											1,110
Conversion of Common OP Units to common stock (in shares)											7,815,000	0