Acquisitions and Dispositions (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) property	Jun. 30, 2015 USD ($)
Properties acquired | property			3
Apartment Units			479
Purchase Price	$ 204,134		$ 204,134
Disposed Properties | property			83
Apartment Units			26,890
Sales Price			$ 6,454,858
Net gain on sales of real estate properties	57,356	$ 148,802	3,780,835	$ 228,753
Net gain (loss) on sales of land parcels	0	0	$ 11,722	(1)
Rental Properties – Consolidated (1)
Properties acquired | property			3
Apartment Units			479
Purchase Price	204,134		$ 204,134
Disposed Properties | property			83
Apartment Units			26,890
Sales Price			$ 6,427,403
Land [Member]
Purchase Price	80,900		$ 80,900
Disposed Land Parcels | property			2
Sales Price			$ 27,455
Depreciable Property [Member]
Purchase Price	123,200		$ 123,200
Starwood Portfolio [Member]
Disposed Properties | property			72
Apartment Units			23,262
Sales Price			$ 5,365,000
Net gain on sales of real estate properties	$ (21)	$ 0	$ 3,161,200	$ 0
Starwood Portfolio [Member] | Rental Properties – Consolidated (1)
Disposed Properties | property			72
Apartment Units			23,262