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DEBT - Interest Rates (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 21, 2005
Sep. 30, 2015
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Interest rates on debt          
Effective Interest Rate (as a percent)     3.22% 3.71% 5.31%
Letter of credit          
Restricted cash     $ 315 $ 315  
Minimum          
Interest rates on debt          
Range of interest rates (excluding unused commitment fees)     2.24% 2.65% 4.05%
Maximum          
Interest rates on debt          
Range of interest rates (excluding unused commitment fees)     3.48% 3.50% 5.76%
Letter of credit          
Letter of credit          
Fee on letter of credit (as a percent) 1.00% 1.375% 1.375% 1.375%  
Amount of letters outstanding     $ 300 $ 300  
Restricted cash     $ 315 $ 315  
Letter of credit | Minimum          
Letter of credit          
Notice period for cancellation of line of credit     30 days