Investment Securities - Schedule of Unrealized Loss Positions (Details) $ in Thousands	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 3,172	$ 108,486
Less than 12 months, unrealized loss	(77)	(10,446)
12 months or more, fair value	293,311	212,317
12 months or more, unrealized loss	$ (33,412)	$ (39,353)
United States government agency securities
Description and number of positions
Number of investments in an unrealized loss position, AFS \| loan	25	32
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 316	$ 21,287
Less than 12 months, unrealized loss	0	(1,937)
12 months or more, fair value	34,619	19,423
12 months or more, unrealized loss	$ (5,603)	$ (4,700)
United States sponsored mortgage-backed securities
Description and number of positions
Number of investments in an unrealized loss position, AFS \| loan	47	51
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 0	$ 6,953
Less than 12 months, unrealized loss	0	(852)
12 months or more, fair value	50,345	49,618
12 months or more, unrealized loss	$ (10,549)	$ (10,844)
United States treasury securities
Description and number of positions
Number of investments in an unrealized loss position, AFS \| loan	23	29
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 0	$ 11,936
Less than 12 months, unrealized loss	0	(130)
12 months or more, fair value	100,354	102,092
12 months or more, unrealized loss	$ (6,045)	$ (9,698)
Municipal securities
Description and number of positions
Number of investments in an unrealized loss position, AFS \| loan	216	173
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 847	$ 65,930
Less than 12 months, unrealized loss	(10)	(7,507)
12 months or more, fair value	106,060	41,184
12 months or more, unrealized loss	$ (11,148)	$ (14,111)
Corporate debt securities
Description and number of positions
Number of investments in an unrealized loss position, AFS \| loan	7	3
Investments in an Unrealized Loss Position
Less than 12 months, fair value	$ 2,009	$ 2,380
Less than 12 months, unrealized loss	(67)	(20)
12 months or more, fair value	1,933	0
12 months or more, unrealized loss	$ (67)	$ 0

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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