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INVESTMENT SECURITIES - Amortized Cost and Fair Values of Investment Securities Available-for-sale (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | $ 421,272 | $ 400,718
Unrealized Gain | 4,833 | 10,440
Unrealized Loss | (4,639) | (534)
Investment securities available-for-sale | 421,466 | 410,624
Total debt securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 420,394 | 399,790
Unrealized Gain | 4,833 | 10,440
Unrealized Loss | (4,639) | (534)
Investment securities available-for-sale | 420,588 | 409,696
United States government agency securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 41,105 | 53,207
Unrealized Gain | 228 | 872
Unrealized Loss | (896) | (210)
Investment securities available-for-sale | 40,437 | 53,869
United States sponsored mortgage-backed securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 77,519 | 94,968
Unrealized Gain | 222 | 972
Unrealized Loss | (1,633) | (171)
Investment securities available-for-sale | 76,108 | 95,769
United States treasury securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 112,133 | 3,000
Unrealized Gain | 0 | 123
Unrealized Loss | (1,744) | 0
Investment securities available-for-sale | 110,389 | 3,123
Municipal securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 171,044 | 223,642
Unrealized Gain | 4,334 | 8,327
Unrealized Loss | (366) | (82)
Investment securities available-for-sale | 175,012 | 231,887
Corporate debt securities |  |
Amortized cost and fair values of investment securities available-for-sale |  |
Amortized Cost | 11,093 | 17,473
Unrealized Gain | 49 | 146
Unrealized Loss | 0 | (71)
Investment securities available-for-sale | 11,142 | 17,548
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 | 878 | 928
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Investment securities available-for-sale | $ 878 | $ 928

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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 http://asc.fasb.org/extlink&oid=123581744&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 http://asc.fasb.org/extlink&oid=123581744&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 http://asc.fasb.org/extlink&oid=123581744&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 http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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