COMMITMENTS AND CONTINGENCIES - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Operating leases
Other assets: Other	$ 14,762	$ 15,318
Other accrued liabilities	1,065	1,802
Other long-term liabilities	13,838	13,601
Total	14,903	15,403
Finance leases
Depreciable plant and equipment	19,820	19,494
Accumulated depreciation and amortization	14,017	12,411
Net utility plant	5,803	7,083
Current maturities of long-term debt, net	2,555	809
Long-term debt, net	2,675	4,918
Total finance lease liabilities	$ 5,230	$ 5,727
Weighted average remaining lease term
Operating leases	119 months	129 months
Finance leases	32 months	46 months
Weighted average discount rate
Operating leases	3.50%	3.40%
Finance leases	4.40%	4.60%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities