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LEASES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Leases [Abstract]      
Tenant allowance $ 1,621 $ 1,621 $ 3,800
Disbursements of tenant allowance $ 2,200    
Operating lease, weighted average remaining lease terms 6 years 7 months 6 days 6 years 8 months 12 days  
Operating lease, weighted average discount rate 6.10% 6.06%