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Investment Securities - Amortized Cost and Fair Values of Investment Securities Available-for-sale (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | $ 427,128 | $ 421,272
Unrealized Gain | 2,485 | 4,833
Unrealized Loss | (49,799) | (4,639)
Investment securities available-for-sale | 379,814 | 421,466
Total debt securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 426,304 | 420,394
Unrealized Gain | 2,485 | 4,833
Unrealized Loss | (49,799) | (4,639)
Investment securities available-for-sale | 378,990 | 420,588
United States government agency securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 51,436 | 41,105
Unrealized Gain | 15 | 228
Unrealized Loss | (6,637) | (896)
Investment securities available-for-sale | 44,814 | 40,437
United States sponsored mortgage-backed securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 68,267 | 77,519
Unrealized Gain | 0 | 222
Unrealized Loss | (11,696) | (1,633)
Investment securities available-for-sale | 56,571 | 76,108
United States treasury securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 130,689 | 112,133
Unrealized Gain | 48 | 0
Unrealized Loss | (9,828) | (1,744)
Investment securities available-for-sale | 120,909 | 110,389
Municipal securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 157,842 | 171,044
Unrealized Gain | 2,412 | 4,334
Unrealized Loss | (21,618) | (366)
Investment securities available-for-sale | 138,636 | 175,012
Corporate debt securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 10,570 | 11,093
Unrealized Gain | 10 | 49
Unrealized Loss | (20) | 0
Investment securities available-for-sale | 10,560 | 11,142
Other debt securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 7,500 | 7,500
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Investment securities available-for-sale | 7,500 | 7,500
Other securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 824 | 878
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Investment securities available-for-sale | $ 824 | $ 878

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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://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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- Definition Amount, before tax, of unrealized loss 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 (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amortized cost 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 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 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 + Details
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