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Securities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2025 USD ($) item	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Securities
Allowance for credit losses	$ 0		$ 0
Realized gain (loss) on sale of available-for-sale securities	143,000	$ (194,000)
Proceeds from sale of available-for-sale securities	7,733,000	25,091,000
Carrying value of securities pledged	118,700,000		121,400,000
Fair value of investment in debt securities	$ 221,700,000		$ 208,800,000
Percentage of fair value of investment in debt	96.00%		87.00%
Number of investments in available for sale securities | item	196
Tranche One
Securities
Proceeds from sale of available-for-sale securities	$ 140,000,000	20,300,000
Loss on the sale of available-for-sale securities	2,000,000	228,000,000
Tranche Two
Securities
Proceeds from sale of available-for-sale securities	7,593,000,000	5,000,000
Gain on sale of available-for-sale securities	$ 145,000,000	$ 34,000,000

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