Investment Securities - Summary of Credit Quality Indicators of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	$ 708,987	$ 628,829
AA+
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	706,216
AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)		626,095
Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	2,771	2,734
U.S. Treasury securities
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	49,190	73,044
U.S. Treasury securities \| AA+
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	49,190
U.S. Treasury securities \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)		73,044
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	196,530	201,809
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises \| AA+
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	196,530
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)		201,809
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	460,496	351,242
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises \| AA+
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	460,496
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)		351,242
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	80	79
Municipal securities \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	80	79
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	1,962	1,843
Corporate debt \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	1,962	1,843
Other securities
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	729	812
Other securities \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	$ 729	$ 812