NOTES PAYABLE - Callable Medium-Term Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total principal net of discounts	$ 34,779,904	$ 30,815,880
Weighted-Average Rate	3.63%
Year one
Debt Instrument [Line Items]
Weighted-Average Rate	3.52%
Year two
Debt Instrument [Line Items]
Weighted-Average Rate	3.89%
Year three
Debt Instrument [Line Items]
Weighted-Average Rate	4.05%
Year four
Debt Instrument [Line Items]
Weighted-Average Rate	3.67%
Call Option
Debt Instrument [Line Items]
2027	$ 1,063,769
2028	1,003,567
2029	912,969
2030	1,206,079
Thereafter	1,441,761
Total principal net of discounts	$ 5,628,145
Weighted-Average Rate	3.18%
Call Option | Year one
Debt Instrument [Line Items]
Weighted-Average Rate	2.80%
Call Option | Year two
Debt Instrument [Line Items]
Weighted-Average Rate	3.79%
Call Option | Year three
Debt Instrument [Line Items]
Weighted-Average Rate	4.26%
Call Option | Year four
Debt Instrument [Line Items]
Weighted-Average Rate	2.98%
Call Option | Thereafter
Debt Instrument [Line Items]
Weighted-Average Rate	2.51%