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Investment Securities - Summary of Available-for-Sale Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | $ 794,649 | $ 727,819
Gross unrealized gains | 225 | 57
Gross unrealized losses | (103,798) | (99,047)
Fair Value | 691,076 | 628,829
U.S. Treasury Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 74,518 | 74,508
Gross unrealized gains | 3 |
Gross unrealized losses | (1,333) | (1,464)
Fair Value | 73,188 | 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] |  |
Amortized cost | 230,597 | 233,264
Gross unrealized gains | 131 | 57
Gross unrealized losses | (33,668) | (31,512)
Fair Value | 197,060 | 201,809
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 486,723 | 417,155
Gross unrealized gains | 91 |
Gross unrealized losses | (68,685) | (65,913)
Fair Value | 418,129 | 351,242
Municipal Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 80 | 80
Gross unrealized losses |  | (1)
Fair Value | 80 | 79
Corporate Debt |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 2,000 | 2,000
Gross unrealized losses | (112) | (157)
Fair Value | 1,888 | 1,843
Other Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 731 | 812
Fair Value | $ 731 | $ 812

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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