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Investment Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-sale debt securities: |  |
Amortized Cost | $ 267,096 | $ 63,184
Unrealized Gains | 0 | 29
Unrealized Losses | 24,901 | 351
Fair Value | 242,195 | 62,862
Held-to-maturity debt securities: |  |
Amortized Cost | 402,142 | 329,257
Unrealized Gains | 3 | 2,904
Unrealized Losses | 55,520 | 1,535
Fair Value | 346,625 | 330,626
Amortized Cost | 669,238 | 392,441
Unrealized Gains | 3 | 2,933
Unrealized Losses | 80,421 | 1,886
Fair Value | 588,820 | 393,488
U.S. Treasury and U.S. government agencies |  |
Available-for-sale debt securities: |  |
Amortized Cost | 39,511 |
Unrealized Gains | 0 |
Unrealized Losses | 1,927 |
Fair Value | 37,584 |
Held-to-maturity debt securities: |  |
Amortized Cost | 245,638 | 178,136
Unrealized Gains | 3 | 26
Unrealized Losses | 36,102 | 1,165
Fair Value | 209,539 | 176,997
Mortgage-backed U.S. government agencies |  |
Available-for-sale debt securities: |  |
Amortized Cost | 187,757 | 49,760
Unrealized Gains | 0 | 3
Unrealized Losses | 19,553 | 283
Fair Value | 168,204 | 49,480
Held-to-maturity debt securities: |  |
Amortized Cost | 52,788 | 61,157
Unrealized Gains | 0 | 440
Unrealized Losses | 7,325 | 272
Fair Value | 45,463 | 61,325
State and political subdivision obligations |  |
Available-for-sale debt securities: |  |
Amortized Cost | 4,360 | 3,899
Unrealized Gains | 0 | 26
Unrealized Losses | 986 | 11
Fair Value | 3,374 | 3,914
Held-to-maturity debt securities: |  |
Amortized Cost | 87,724 | 75,958
Unrealized Gains | 0 | 2,305
Unrealized Losses | 10,951 | 27
Fair Value | 76,773 | 78,236
Corporate debt securities |  |
Available-for-sale debt securities: |  |
Amortized Cost | 35,468 | 9,525
Unrealized Gains | 0 | 0
Unrealized Losses | 2,435 | 57
Fair Value | 33,033 | 9,468
Held-to-maturity debt securities: |  |
Amortized Cost | 15,992 | 14,006
Unrealized Gains | 0 | 133
Unrealized Losses | 1,142 | 71
Fair Value | $ 14,850 | $ 14,068

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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