Investment Securities and Certificates of Deposit - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Schedule Of Marketable Securities [Line Items]
Debt Securities, Available-for-Sale, Unrealized Gain	$ 1		$ 297
Debt Securities, Available-for-Sale, Unrealized Loss	(1)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax	(301)	$ (145)
Debt Securities, Available-for-Sale, Realized Gain	3
Debt Securities, Available-for-Sale, Realized Loss	(20)	(47)
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale	816,039	747,511
Certificates of Deposit, at contract value	$ 16,816		$ 66,660
Certificates of Deposit
Schedule Of Marketable Securities [Line Items]
Cash and Cash Equivalents Maturity	4 months
Equity Securities
Schedule Of Marketable Securities [Line Items]
Investment Securities, Unrealized Gain (Loss)	$ (89)	(78)
Debt Securities Carried by EGL
Schedule Of Marketable Securities [Line Items]
Marketable Security, Gain (Loss)	(104)	(135)
Investment Funds
Schedule Of Marketable Securities [Line Items]
Marketable Security, Gain (Loss)	(5,931)	14,895
Investment Securities, Unrealized Gain (Loss)	$ (28,539)	$ 5,215

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Schedule Of Marketable Securities [Line Items]

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Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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