Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Supplemental cash flow information:
Interest paid, net of capitalized interest	$ 163,455	$ 241,585
Income taxes paid	10,335	4,433
Capitalized interest	7,628	5,734
Supplemental schedule of non-cash investing and financing activities:
Accrued construction costs	68,618	57,143
Non-cash acquisitions and dispositions settled with receivables and restricted cash held in connection with Section 1031 transactions	39,991	129,846
Vesting of restricted stock units and conversion of non-managing member units into common stock	2,451	5,310
Other liabilities assumed with real estate acquisitions	160	1,200
Unrealized losses on available-for-sale securities and derivatives designated as cash flow hedges, net	$ (48)	$ 343