Investment Securities and Certificates of Deposit - Estimated Fair Value of Investment Securities (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Debt Securities, Available-for-sale [Line Items] | ||
| Debt Securities, Available-for-sale | $ 199,318 | $ 877,803 |
| Total Investment Securities, at fair value | 1,129,407 | 1,540,217 |
| Certificates of Deposit, at contract value | 18,926 | 40,421 |
| Total Investment Securities and Certificates of Deposit | 1,148,333 | 1,580,638 |
| Debt Securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Debt Securities, Available-for-sale | 199,318 | 877,803 |
| Equity Securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Equity Securities, FV-NI | 375 | 355 |
| Debt Securities Carried by EGL | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Debt Securities, Trading | 759,725 | 486,641 |
| Investment Funds | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Equity Securities, FV-NI | $ 169,989 | $ 175,418 |
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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