Schedule III - Real Estate and Accumulated Depreciation Reconciliation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of the year	$ 3,962,032
Acquistion and development of rental properties during the year	613,311
Disposition of rental properties during the year	(24,406)
Balance at close of year	4,550,937
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of the year	534,303
Depreciation during the year	105,121
Disposition of rental properties during the year	(3,889)
Balance at close of year	$ 635,535