CAPITAL STOCK - Schedule of Preferred Stock (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Shares Authorized (in shares)	63,500,000	63,500,000
Shares Issued (in shares)	63,500,000	63,500,000
Shares Outstanding (in shares)	63,500,000	63,500,000
Carrying Value	$ 1,536,569	$ 1,536,569	[1]
Series F
Class of Stock [Line Items]
Shares Authorized (in shares)	28,800,000	28,800,000
Shares Issued (in shares)	28,800,000	28,800,000
Shares Outstanding (in shares)	28,800,000	28,800,000
Carrying Value	$ 696,910	$ 696,910
Contractual Rate	6.95%
Floating Annual Rate	4.993%
Series G
Class of Stock [Line Items]
Shares Authorized (in shares)	17,000,000	17,000,000
Shares Issued (in shares)	17,000,000	17,000,000
Shares Outstanding (in shares)	17,000,000	17,000,000
Carrying Value	$ 411,335	$ 411,335
Contractual Rate	6.50%
Floating Annual Rate	4.172%
Series I
Class of Stock [Line Items]
Shares Authorized (in shares)	17,700,000	17,700,000
Shares Issued (in shares)	17,700,000	17,700,000
Shares Outstanding (in shares)	17,700,000	17,700,000
Carrying Value	$ 428,324	$ 428,324
Contractual Rate	6.75%
Floating Annual Rate	4.989%

[1] (1)Derived from the audited consolidated financial statements at December 31, 2021.