EQUITY AND MEZZANINE EQUITY - Sale of Common Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average price of shares issued (in dollars per share)	$ 60.35	$ 60.01	$ 68.44	$ 60.00
At-The-Market Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Common Shares	624		674
Total Consideration	$ 44,848		$ 48,250
Average price of shares issued (in dollars per share)	$ 71.84		$ 71.56