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SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Apr. 30, 2020	Dec. 31, 2019
Debt instruments
Loss on extinguishment of debt, net			$ 7,386	$ 37,434	$ 7,386	$ 41,861
4.75% Senior Notes due 2030
Debt instruments
Senior notes		$ 500,000	$ 500,000		$ 500,000		$ 500,000	$ 0
Interest rate		4.75%	4.75%		4.75%		4.75%
Public offering price as percent of par							97.86%
3.25% Senior Notes due 2022
Debt instruments
Senior notes		$ 500,000	$ 500,000		$ 500,000			$ 500,000
Interest rate		3.25%	3.25%		3.25%
Loss on extinguishment of debt, net		$ 7,400
3.25% Senior Notes due 2022 \| Subsequent Event
Debt instruments
Interest rate	3.25%
Repurchased amount	$ 236,300
Percentage of par value	104.14%
Loss on extinguishment of debt, net	$ 3,500