Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Nonrecourse
Debt Instrument [Line Items]
Principal	$ 4,871,528	$ 4,634,235
Secured Debt \| Nonrecourse \| Operating
Debt Instrument [Line Items]
Principal	4,870,928	4,633,735
Carrying Value
Debt Instrument [Line Items]
Long-term debt	569,771	568,912
Carrying Value \| Operating Segments \| Investment Management
Debt Instrument [Line Items]
Long-term debt	199,033	198,677
Carrying Value \| Operating Segments \| Operating
Debt Instrument [Line Items]
Long-term debt	70,246	70,120
Carrying Value \| Corporate and Other
Debt Instrument [Line Items]
Long-term debt	300,492	300,115
Carrying Value \| Nonrecourse
Debt Instrument [Line Items]
Long-term debt	4,752,050	4,587,228
Carrying Value \| Secured Debt
Debt Instrument [Line Items]
Principal	578,422	578,422
Premium (discount), net	(1,175)	(1,293)
Deferred financing costs	(7,476)	(8,217)
Long-term debt	569,771	568,912
Carrying Value \| Secured Debt \| Series 2021-1 Notes
Debt Instrument [Line Items]
Principal	300,000	300,000
Premium (discount), net	0	0
Deferred financing costs	(7,305)	(7,829)
Long-term debt	292,695	292,171
Carrying Value \| Secured Debt \| Series 2021-1 Notes \| Operating Segments \| Investment Management
Debt Instrument [Line Items]
Long-term debt	199,033	198,677
Carrying Value \| Secured Debt \| Series 2021-1 Notes \| Operating Segments \| Operating
Debt Instrument [Line Items]
Long-term debt	70,246	70,120
Carrying Value \| Secured Debt \| Series 2021-1 Notes \| Corporate and Other
Debt Instrument [Line Items]
Long-term debt	23,416	23,374
Carrying Value \| Secured Debt \| Nonrecourse
Debt Instrument [Line Items]
Principal	4,871,528	4,634,235
Premium (discount), net	(47,922)	10,713
Deferred financing costs	(71,556)	(57,720)
Carrying Value \| Convertible and Exchangeable Senior Notes
Debt Instrument [Line Items]
Principal	278,422	278,422
Premium (discount), net	(1,175)	(1,293)
Deferred financing costs	(171)	(388)
Long-term debt	277,076	276,741
Carrying Value \| Convertible and Exchangeable Senior Notes \| Operating Segments \| Investment Management
Debt Instrument [Line Items]
Long-term debt	0	0
Carrying Value \| Convertible and Exchangeable Senior Notes \| Operating Segments \| Operating
Debt Instrument [Line Items]
Long-term debt	0	0
Carrying Value \| Convertible and Exchangeable Senior Notes \| Corporate and Other
Debt Instrument [Line Items]
Long-term debt	$ 277,076	$ 276,741

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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Amount, after accumulated amortization, of debt discount (premium).

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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