SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property and Equipment
Gross property and equipment	$ 921,602	$ 904,436
Less accumulated depreciation and amortization	(336,168)	(323,939)
Property and equipment, net	585,434	580,497
Land
Property and Equipment
Gross property and equipment	34,688	34,688
Land improvements
Property and Equipment
Gross property and equipment	11,045	11,045
Buildings
Property and Equipment
Gross property and equipment	474,724	474,724
Building improvements
Property and Equipment
Gross property and equipment	101,253	100,822
Furniture
Property and Equipment
Gross property and equipment	255,276	254,486
Construction in progress
Property and Equipment
Gross property and equipment	25,725	9,552
Right of use assets
Property and Equipment
Gross property and equipment	14,646	14,874
Leasehold improvements
Property and Equipment
Gross property and equipment	$ 4,245	$ 4,245