EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator for basic and diluted earnings per share:
Income from continuing operations	$ 211,898	$ 169,300	$ 339,486	$ 249,408
Discontinued operations	0	0	0	(10)
Net income	211,898	169,300	339,486	249,398
Net income attributable to noncontrolling interests	1,369	2,781	3,172	4,176
Net income attributable to common stockholders	$ 210,529	$ 166,519	$ 336,314	$ 245,222
Denominator:
Denominator for basic earnings per share—weighted average shares (in shares)	361,722	356,228	359,301	356,175
Effect of dilutive securities:
Stock options (in shares)	365	115	347	120
Restricted stock awards (in shares)	468	236	454	211
OP Unitholder Interests (in shares)	2,998	2,421	2,998	2,425
Denominator for diluted earnings per share—adjusted weighted average shares (in shares)	365,553	359,000	363,100	358,931
Basic earnings per share:
Income from continuing operations (in usd per share)	$ 0.59	$ 0.48	$ 0.94	$ 0.70
Net income attributable to common stockholders (in usd per share)	0.58	0.47	0.94	0.69
Diluted earnings per share:
Income from continuing operations (in usd per share)	0.58	0.47	0.93	0.69
Net income attributable to common stockholders (in usd per share)	0.58	0.46	0.93	0.68
Dividends declared per common share	$ 0.7925	$ 0.79	$ 1.585	$ 1.58