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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Real Estate Partnerships (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) contract investment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Limited partner interest (as a percent) | 99.00% |  |
Number of investments accounted for under the proportional amortization method | investment | 1 |  |
Recorded investment in real estate partnerships | $ 2,600 | $ 3,100 |
Investments accounted for under proportional amortization method | 921 | 1,100 |
Losses accounted for under the equity method | 272 | 299 | $ 55
Losses on investments accounted for under proportional amortization method | 214 | 214 | 214
Federal tax credits | $ 315 | $ 460 | $ 460
Real Estate Partnerships Interest |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of investments accounted for under the equity method | contract | 5 |  |

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- Definition Income (Loss) From Affordable Housing Projects, Proportional Amortization Method + References No definition available. + Details
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- Definition Investment in real estate partnership. + References No definition available. + Details
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- Definition Percentage of limited partner interest. + References No definition available. + Details
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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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