Investment Securities - Summary of Credit Quality Indicators of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	$ 659,347	$ 706,289
AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	656,560	703,445
Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	2,787	2,844
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	71,575	71,388
U.S. Treasury Securities [Member] \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	71,575	71,388
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member].
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	211,205	226,131
Residential Mortgage Pass-Through Securities Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]. \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	211,205	226,131
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	373,780	405,926
Other Residential MBS Issued or Guaranteed by U.S. Government Agencies or Sponsored Enterprises [Member] \| AAA
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	373,780	405,926
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	153	153
Municipal Securities [Member] \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	153	153
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	1,841	1,920
Corporate Debt Securities [Member] \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	1,841	1,920
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	793	771
Other Securities [Member] \| Not Rated
Schedule of Available-for-sale Securities [Line Items]
Investment securities available-for-sale (at fair value)	$ 793	$ 771