Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accumulated depreciation, property and equipment	$ 7,247,071	$ 6,613,219
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Shares Issued	1,650,000	0
Preferred Stock, Shares Outstanding	1,650,000	0
Preferred Stock, Liquidation Preference, Value	$ 1,650,000	$ 0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Common stock, shares outstanding	406,274,802	360,536,659