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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Real Estate Partnerships (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
investment
contract
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Schedule of Equity Method Investments [Line Items]      
Number of investments accounted for under the proportional amortization method | investment 1    
Number of investments accounted for under the equity method | contract 5    
Recorded investment in real estate partnerships $ 2,100 $ 2,600  
Investments accounted for under proportional amortization method 707 921  
Losses accounted for under the equity method 274 272 $ 299
Losses on investments accounted for under proportional amortization method 214 214 214
Federal tax credits $ 260 $ 315 $ 460
Real Estate Partnerships Interest      
Schedule of Equity Method Investments [Line Items]      
Limited partner interest (as a percent) 99.00%