Schedule III - Real Estate and Accumulated Depreciation Reconciliation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance at beginning of the year	$ 5,636,886
Acquistion and development of rental properties during the year	629,944
Disposition of rental properties during the year	(21,328)
Other Deductions during the year	16,548
Balance at close of year	6,228,954
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of the year	741,334
Depreciation during the year	144,042
Disposition of rental properties during the year	(2,202)
Balance at close of year	$ 883,174