EQUITY - Changes in Common Stock (Details) - shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Changes in Common Stock [Roll Forward]
Beginning common shares outstanding (in shares)	105,708,787	105,169,515
Grants (in shares)	860,910	676,171
Common Unit redemptions (in shares)	2,500	33,579
Performance share and other forfeitures (in shares)	(60,823)	(210,897)
Shares retained for employee tax withholding requirements (in shares)	(155,605)	(65,345)
Ending common shares outstanding (in shares)	106,416,315	105,696,833
Annual grants to independent directors
Changes in Common Stock [Roll Forward]
Grants (in shares)	60,546	93,810