INCOME TAXES - Schedule of Components of Deferred Income Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Income Tax Liabilities:
Property and Equipment	$ 103	$ 232
Goodwill and Other Intangibles	657	949
Investment in Partnership	131,002	161,499
Operating Lease Right-of-Use Assets	173	271
Total Deferred Income Tax Liabilities	131,935	162,951
Deferred Income Tax Assets:
Accrued Liabilities	9,769	10,420
Advance Payments	38	33
Operating Lease Liabilities	191	382
Other, Net	25,795	23,598
Total Deferred Income Tax Assets	35,793	34,433
Less: Valuation Allowance	(5,715)	(5,788)
Net Deferred Income Tax Liabilities	$ 101,857	$ 134,306