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Investment Securities and Certificates of Deposit - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Schedule Of Marketable Securities [Line Items]          
Debt Securities, Available-for-Sale, Unrealized Gain $ 45 $ 342 $ 193 $ 348  
Debt Securities, Available-for-Sale, Unrealized Loss (193) (6) (193) (23)  
Debt Securities, Available-for-Sale, Realized Loss (110)   (261) (34)  
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale 244,605 56,918 1,243,992 763,711  
Certificates of Deposit, at Carrying Value 54,380   $ 54,380   $ 122,890
Certificates of Deposit          
Schedule Of Marketable Securities [Line Items]          
Cash and Cash Equivalents Maturity     4 months    
Equity Securities [Member]          
Schedule Of Marketable Securities [Line Items]          
Investment Securities, Realized and Unrealized Gains (Losses) 60 (459) $ 223 (448)  
Debt Securities Carried By EGL [Member]          
Schedule Of Marketable Securities [Line Items]          
Investment Securities, Realized and Unrealized Gains (Losses) 12 507 18 528  
Investment Funds [Member]          
Schedule Of Marketable Securities [Line Items]          
Investment Securities, Realized and Unrealized Gains (Losses) 11,615 (26,353) 21,056 (31,516)  
Investment Securities, Unrealized Gain (Loss) $ 11,570 $ (26,932) $ 16,250 $ (47,216)