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Investment Securities - Summary of Available-for-Sale Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 748,478	$ 819,762
Gross unrealized gains	14	1
Gross unrealized losses	(128,047)	(113,474)
Fair Value	620,445	706,289
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	74,386	74,031
Gross unrealized losses	(2,524)	(2,643)
Fair Value	71,862	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]
Amortized cost	240,292	263,939
Gross unrealized gains	14	1
Gross unrealized losses	(43,458)	(37,809)
Fair Value	196,848	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]
Amortized cost	430,853	478,866
Gross unrealized losses	(81,911)	(72,940)
Fair Value	348,942	405,926
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	155	155
Gross unrealized losses	(3)	(2)
Fair Value	152	153
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	2,000	2,000
Gross unrealized losses	(151)	(80)
Fair Value	1,849	1,920
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	792	771
Fair Value	$ 792	$ 771

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