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SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
SECURITIES |  |
Carrying value of securities pledged to secure public and trust deposits | $ 1,335,432 | $ 1,278,195
Assets Pledged |  |
SECURITIES |  |
Carrying value of securities pledged to secure public and trust deposits | $ 413,400 | $ 353,300
Illinois |  |
SECURITIES |  |
Percentage of obligations of local municipalities | 49.00% |
Percentage of general obligations in local municipalities | 81.00% |

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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity) and 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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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