SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Depreciation expense	$ 31,471	$ 32,847	$ 33,618
Property, Plant and Equipment [Line Items]
Property and equipment, gross	493,230	511,108
Accumulated depreciation	(238,439)	(223,378)
Net property and equipment before construction in progress	254,791	287,730
Capital improvements in progress	89,899	88,298
Net property and equipment	$ 344,690	376,028
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	40 years
Land, land easements and land improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 99,141	105,514
Land, land easements and land improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	0 years
Land, land easements and land improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 37,166	37,177
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	40 years
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 223,880	227,824
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	40 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 19,779	20,619
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Leasehold improvements and other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 113,264	$ 119,974