Non-Recourse Secured Debt, Net - Schedule of Debt Principal Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total
2022	$ 220,270
2023	394,582
2024	196,730
2025	341,730
2026	90,891
Thereafter through 2039	11,242
Total principal payments	1,255,445
Unamortized deferred financing costs	(6,749)	$ (6,900)
Unamortized premium, net	4,349	$ 2,500
Total	$ 1,253,045

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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