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OPERATING LEASES - Operating Lease Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]      
Operating lease income $ 8,857 $ 11,476 $ 13,887
Variable lease income 828 0 745
Total operating lease income $ 9,685 $ 11,476 $ 14,632
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Total operating revenues Total operating revenues