Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Common stock, shares outstanding	113,518,212	75,408,571
Preferred Stock, Shares Issued	867,846
Preferred Stock, Shares Outstanding	867,846
General partners' capital account, units outstanding	113,518,212	75,408,571
Limited partners' capital account, units outstanding	4,220,403	4,162,996
Preferred Stock, Liquidation Preference Per Share	$ 50.00
Limited Partner [Member]
Redeemable stock, shares/units issued and outstanding	103,578	90,844
General partners' capital account, units outstanding	113,518,212	75,408,571
Limited partners' capital account, units outstanding	4,220,403	4,162,996
Preferred Units, Issued	867,846	0
Preferred Units, Outstanding	867,846	0
Parent Company [Member]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	145,000,000	100,000,000
Common stock, shares issued	113,518,212	75,408,571
Common stock, shares outstanding	113,518,212	75,408,571
Redeemable stock, shares/units issued and outstanding	103,578	90,844
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.00
Preferred Stock, Shares Authorized	20,000,000	0
Preferred Stock, Shares Issued	867,846	0
Preferred Stock, Shares Outstanding	867,846	0
Preferred Stock, Liquidation Preference Per Share	$ 50	$ 0