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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Details) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 01, 2021 | Aug. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  | $ 94,301,000 | $ 37,144,000 | $ 37,144,000 | $ 37,144,000
Goodwill, acquired |  |  | 57,157,000 | 0 | 0 |
Accumulated impairment losses at end of year |  |  | 2,100,000 | 2,100,000 | 2,100,000 |
Goodwill, impairment loss | $ 0 | $ 0 | 0 | 0 | 0 |
Impairment on intangible assets |  |  | $ 0 | $ 0 | $ 0 |
Core Deposits |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization period of other intangible assets |  |  | 10 years |  |  |
Weighted average amortization period |  |  | 8 years 1 month 6 days |  |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + 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(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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