SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Reconciliation of Real Estate and Accumulated Depreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Real Estate
Balance at beginning of year	$ 6,163,287	$ 5,355,409	$ 4,979,840
Change in land	239,558	199,069	93,833
Additions	1,513,888	1,148,826	790,183
Impairments	0	0	0
Dispositions and write-offs and land costs of sales	(648,445)	(540,017)	(508,447)
Balance at end of year	7,268,288	6,163,287	5,355,409
Reconciliation of Accumulated Depreciation
Balance at beginning of year	380,892	321,882	245,814
Depreciation expense	143,698	113,518	116,401
Dispositions and write-offs	(16,657)	(54,508)	(40,333)
Balance at end of year	$ 507,933	$ 380,892	$ 321,882