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PROPERTY, NET - Components of Property (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 647,219 $ 647,063
Less - Accumulated depreciation and amortization 419,680 414,547
Property, net 227,539 232,516
Deferred rent 6,550 6,550
Office Building    
Property, Plant and Equipment [Line Items]    
Property, net $ 71,343 72,921
Buildings    
Property, Plant and Equipment [Line Items]    
Estimated Depreciable Life in Years 33 years  
Property, plant and equipment, gross $ 167,135 170,830
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 233,243 233,732
Leasehold improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Depreciable Life in Years 3 years  
Leasehold improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Depreciable Life in Years 20 years  
Furniture and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 231,961 230,713
Furniture and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated Depreciable Life in Years 3 years  
Furniture and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated Depreciable Life in Years 10 years  
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 14,880 $ 11,788