CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Total Stockholders' Equity	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interests
Balance (in shares) at Dec. 31, 2017	140,993,985		140,993,985
Balance at Dec. 31, 2017	$ 3,967,999	$ 3,681,578	$ 1,410	$ 4,510,489	$ (830,279)	$ (42)	$ 286,421
Increase (Decrease) in Stockholders' Equity
Net income	55,726	48,271			48,271		7,455
Interest rate cap/swap agreements	184	184				184
Amortization of share and unit-based plans (in shares)			121,924
Amortization of share and unit-based plans	28,219	28,219	$ 1	28,218
Employee stock purchases (in shares)			17,240
Employee stock purchases	806	806		806
Distributions declared ($2.22) per share	(313,342)	(313,342)			(313,342)
Distributions to noncontrolling interests	(26,101)						(26,101)
Contributions from noncontrolling interests	16						16
Conversion of noncontrolling interests to common shares (in shares)			66,711
Conversion of noncontrolling interests to common shares	0	75	$ 1	74			(75)
Redemption of noncontrolling interests	(719)	(486)		(486)			(233)
Adjustment of noncontrolling interests in Operating Partnership	$ 0	24,002		24,002			(24,002)
Balance (in shares) at Sep. 30, 2018	141,199,860		141,199,860
Balance at Sep. 30, 2018	$ 3,287,929	$ 3,044,448	$ 1,412	$ 4,563,103	$ (1,520,209)	$ 142	$ 243,481