Contractual interest rate for funds borrowed, under the debt agreement.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Aug. 31, 2021	Jul. 31, 2021	Dec. 31, 2020	Apr. 30, 2020
Debt instruments
Loss on extinguishment of debt		$ (74)		$ 0	$ 27,016	$ 0
3.25% Senior Notes due 2022
Debt instruments
Senior notes		$ 263,687			$ 263,687				$ 263,687
Interest rate		3.25%			3.25%
3.25% Senior Notes due 2022 \| Subsequent Event
Debt instruments
Senior notes								$ 263,700
Loss on extinguishment of debt	$ 8,000
3.10% Senior Notes due 2023
Debt instruments
Senior notes		$ 0			$ 0				400,000
Interest rate		3.10%			3.10%					3.10%
Loss on extinguishment of debt			$ 27,300
3.125% Senior Notes due 2023
Debt instruments
Senior notes									$ 400,000
Interest rate		3.125%			3.125%
3.125% Senior Notes due 2023 \| Subsequent Event
Debt instruments
Senior notes							$ 400,000
Loss on extinguishment of debt	$ 21,000