Derivative and Other Fair Value Instruments - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Mortgage notes payable, net	$ 3,743,363	$ 4,119,181
Unrealized gain (loss) on interest rate cash flow hedges, pretax, accumulated other comprehensive income (loss)	101,200	113,900
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	21,800
Mortgage Notes Payable, Net [Member]
Derivative [Line Items]
Mortgage notes payable, net	3,700,000	4,100,000
Debt instrument, fair value disclosure	3,800,000	4,200,000
Unsecured Debt [Member]
Derivative [Line Items]
Notes, net	5,200,000	4,900,000
Debt instrument, fair value disclosure	$ 5,400,000	$ 5,000,000