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Non-Marketable Securities - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Non-marketable Securities      
Non-marketable securities $ 120,733   $ 89,049
Proceeds from non-marketable securities 4,662 $ 60  
FHLB Stock 45,600   20,300
FRB stock 23,700   18,100
Other non-marketable securities 51,400   50,700
Equity method investments 22,400   21,700
Convertible preferred stock without readily determinable fair values 29,000   $ 29,000
Purchase of non-marketable securities 35,900 4,000  
Purchase of other non-marketable securities 0 4,000  
Purchases of FHLB and FRB stock $ 35,900 $ 0