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COMMITMENTS AND CONTINGENCIES - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Operating leases |  |
Other assets: Other | $ 15,318 | $ 15,589
Other accrued liabilities | 1,802 | 1,757
Other long-term liabilities | 13,601 | 13,868
Total | 15,403 | 15,625
Finance leases |  |
Depreciable plant and equipment | 19,494 | 18,207
Accumulated depreciation and amortization | 12,411 | 10,813
Net utility plant | 7,083 | 7,394
Current maturities of long-term debt, net | 809 | 721
Long-term debt, net | 4,918 | 4,483
Total finance lease liabilities | $ 5,727 | $ 5,204
Weighted average remaining lease term |  |
Operating leases | 129 months | 135 months
Finance leases | 46 months | 64 months
Weighted average discount rate |  |
Operating leases | 3.40% | 3.50%
Finance leases | 4.60% | 5.50%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Other accrued liabilities | Other accrued liabilities

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