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DEBT - Senior Unsecured Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020	Oct. 07, 2019	May 29, 2019	Aug. 17, 2017
Debt Instrument [Line Items]
Discount (premium), net	$ 2,882
Deferred financing costs	18,683
Senior Notes
Debt Instrument [Line Items]
Principal balance	1,750,000		$ 1,250,000
Discount (premium), net	2,882		(6,400)
Deferred financing costs	$ 13,552		8,000
Weighted average effective interest rate (percent)	4.01%
Senior Notes \| 4.80% senior unsecured notes due 2024
Debt Instrument [Line Items]
Interest rate	4.80%				4.80%
Principal balance	$ 0		300,000
Senior Notes \| 5.125% senior unsecured notes due 2026
Debt Instrument [Line Items]
Interest rate	5.125%					5.125%
Principal balance	$ 500,000		500,000
Senior Notes \| 5.88% senior unsecured notes due 2027
Debt Instrument [Line Items]
Interest rate	5.88%					5.88%
Principal balance	$ 100,000		100,000
Senior Notes \| 3.90% senior unsecured notes due 2029
Debt Instrument [Line Items]
Interest rate	3.90%			3.90%
Principal balance	$ 350,000		350,000
Senior Notes \| 3.20% senior unsecured notes due 2031
Debt Instrument [Line Items]
Interest rate	3.20%	3.20%
Principal balance	$ 800,000		$ 0