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Investments Securities - Schedule of Investment Securities in Gross Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	$ 600,155	$ 500,942
Investments in AFS debt securities, less than 12 months, gross unrealized losses	(660)	(215)
Investments in AFS debt securities, 12 months or longer, fair value	63,383	94,245
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(2,553)	(3,005)
Investments in AFS debt securities, total, fair value	663,538	595,187
Investments in AFS debt securities, total, gross unrealized losses	(3,213)	(3,220)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	337,363	480,012
Investments in AFS debt securities, less than 12 months, gross unrealized losses	(97)	(58)
Investments in AFS debt securities, 12 months or longer, fair value	29,502	39,065
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(487)	(722)
Investments in AFS debt securities, total, fair value	366,865	519,077
Investments in AFS debt securities, total, gross unrealized losses	(584)	(780)
Multinational securities
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value		0
Investments in AFS debt securities, less than 12 months, gross unrealized losses		0
Investments in AFS debt securities, 12 months or longer, fair value		8,634
Investments in AFS debt securities, 12 months or longer, gross unrealized losses		(17)
Investments in AFS debt securities, total, fair value		8,634
Investments in AFS debt securities, total, gross unrealized losses		(17)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	0	0
Investments in AFS debt securities, less than 12 months, gross unrealized losses	0	0
Investments in AFS debt securities, 12 months or longer, fair value	22,425	31,724
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(911)	(1,092)
Investments in AFS debt securities, total, fair value	22,425	31,724
Investments in AFS debt securities, total, gross unrealized losses	(911)	(1,092)
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	262,792	20,930
Investments in AFS debt securities, less than 12 months, gross unrealized losses	(563)	(157)
Investments in AFS debt securities, 12 months or longer, fair value	6,680	6,912
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(892)	(859)
Investments in AFS debt securities, total, fair value	269,472	27,842
Investments in AFS debt securities, total, gross unrealized losses	(1,455)	(1,016)
Other asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	0	0
Investments in AFS debt securities, less than 12 months, gross unrealized losses	0	0
Investments in AFS debt securities, 12 months or longer, fair value	4,001	7,122
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(92)	(154)
Investments in AFS debt securities, total, fair value	4,001	7,122
Investments in AFS debt securities, total, gross unrealized losses	(92)	(154)
Other
Debt Securities, Available-for-sale [Line Items]
Investments in AFS debt securities, less than 12 months, fair value	0	0
Investments in AFS debt securities, less than 12 months, gross unrealized losses	0	0
Investments in AFS debt securities, 12 months or longer, fair value	775	788
Investments in AFS debt securities, 12 months or longer, gross unrealized losses	(171)	(161)
Investments in AFS debt securities, total, fair value	775	788
Investments in AFS debt securities, total, gross unrealized losses	$ (171)	$ (161)

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