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Investment Securities - Summary of Credit Quality Indicators of Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | $ 695,485 | $ 706,289
AAA |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 692,645 | 703,445
Not Rated |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 2,840 | 2,844
U.S. Treasury Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 72,154 | 71,388
U.S. Treasury Securities [Member] | AAA |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 72,154 | 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) | 222,209 | 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) | 222,209 | 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) | 398,282 | 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) | 398,282 | 405,926
Municipal Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 154 | 153
Municipal Securities [Member] | Not Rated |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 154 | 153
Corporate Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 1,892 | 1,920
Corporate Debt Securities [Member] | Not Rated |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 1,892 | 1,920
Other Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | 794 | 771
Other Securities [Member] | Not Rated |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Investment securities available-for-sale (at fair value) | $ 794 | $ 771

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- Definition Amount of 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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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