Consolidation - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Assets
Cash equivalents	$ 225,736	$ 197,240
Total assets measured at fair value	324,666	307,226
Liabilities
Total liabilities measured at fair value	36,100	56,200
Level 1
Assets
Cash equivalents	225,736	197,240
Total assets measured at fair value	323,210	307,226
Liabilities
Total liabilities measured at fair value	0	0
Level 2
Assets
Cash equivalents	0	0
Total assets measured at fair value	1,456	0
Liabilities
Total liabilities measured at fair value	0	0
Level 3
Assets
Cash equivalents	0	0
Total assets measured at fair value	0	0
Liabilities
Total liabilities measured at fair value	36,100	56,200
Consolidated Investment Products \| Fair Value, Measurements, Recurring
Assets
Cash equivalents	127,695	98,101
Total assets measured at fair value	2,398,412	2,180,814
Liabilities
Notes payable	2,171,946	1,922,243
Short sales	356	518
Total liabilities measured at fair value	2,172,302	1,922,761
Consolidated Investment Products \| Fair Value, Measurements, Recurring \| Debt investments
Assets
Investments	2,246,600	2,049,617
Consolidated Investment Products \| Fair Value, Measurements, Recurring \| Equity investments
Assets
Investments	24,117	33,096
Consolidated Investment Products \| Level 1 \| Fair Value, Measurements, Recurring
Assets
Cash equivalents	127,695	98,101
Total assets measured at fair value	150,688	130,984
Liabilities
Notes payable	0	0
Short sales	356	518
Total liabilities measured at fair value	356	518
Consolidated Investment Products \| Level 1 \| Fair Value, Measurements, Recurring \| Debt investments
Assets
Investments	0	241
Consolidated Investment Products \| Level 1 \| Fair Value, Measurements, Recurring \| Equity investments
Assets
Investments	22,993	32,642
Consolidated Investment Products \| Level 2 \| Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Total assets measured at fair value	2,240,035	2,012,768
Liabilities
Notes payable	2,171,946	1,922,243
Short sales	0	0
Total liabilities measured at fair value	2,171,946	1,922,243
Consolidated Investment Products \| Level 2 \| Fair Value, Measurements, Recurring \| Debt investments
Assets
Investments	2,239,924	2,012,760
Consolidated Investment Products \| Level 2 \| Fair Value, Measurements, Recurring \| Equity investments
Assets
Investments	111	8
Consolidated Investment Products \| Level 3 \| Fair Value, Measurements, Recurring
Assets
Cash equivalents	0	0
Total assets measured at fair value	7,689	37,062
Liabilities
Notes payable	0	0
Short sales	0	0
Total liabilities measured at fair value	0	0
Consolidated Investment Products \| Level 3 \| Fair Value, Measurements, Recurring \| Debt investments
Assets
Investments	6,676	36,616
Consolidated Investment Products \| Level 3 \| Fair Value, Measurements, Recurring \| Equity investments
Assets
Investments	$ 1,013	$ 446

Fair value portion of asset recognized for present right to economic benefit.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of obligations incurred from short sales.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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Fair value portion of notes payable.

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