Notes Payable - Earliest Interest Reset Date of Borrowing Outstanding (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
2022	$ 7,552,679
2023	3,911,802
2024	2,921,874
2025	2,245,254
2026	2,650,362
Thereafter	4,037,187
Total principal net of discounts	$ 23,319,158
Short-term debt, weighted average rate (as a percent)	0.60%	0.45%
Weighted - average rate (as a percent)	1.17%
Total weighted - average rate (as a percent)	1.01%
Due within one year
Debt Instrument [Line Items]
Short-term debt, weighted average rate (as a percent)	0.57%
Year one
Debt Instrument [Line Items]
Weighted - average rate (as a percent)	0.90%
Year two
Debt Instrument [Line Items]
Weighted - average rate (as a percent)	0.94%
Year three
Debt Instrument [Line Items]
Weighted - average rate (as a percent)	1.00%
Year four
Debt Instrument [Line Items]
Weighted - average rate (as a percent)	1.10%
Thereafter
Debt Instrument [Line Items]
Weighted - average rate (as a percent)	1.94%