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OTHER INVESTMENTS (Notes Due 2024 Narrative) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Mar. 06, 2018
Jul. 29, 2016
Schedule of Investments [Line Items]            
Other investments, gross $ 1,459,368,000          
Other investments 469,884,000 $ 467,442,000 $ 412,540,000 $ 419,228,000    
Provision (Recovery) for Credit Losses 76,720,000 34,151,000        
Other Investment Note Due 2024 [Member]            
Schedule of Investments [Line Items]            
Other investments, gross 90,752,000 $ 83,636,000        
Genesis Healthcare [Member] | Other Investment Note Due 2024 [Member]            
Schedule of Investments [Line Items]            
Provision (Recovery) for Credit Losses $ 0          
Genesis Healthcare [Member] | Other Investment Note Due 2024 First Loan [Member]            
Schedule of Investments [Line Items]            
Debt instrument, interest rate, stated percentage 14.00%          
Financing receivable, face amount           $ 48,000,000.0
Other investments $ 71,400,000          
Loans Receivable Interest Paid-In-Kind 9.00%          
Investment Maturity Date Jan. 01, 2024         Jul. 29, 2020
Genesis Healthcare [Member] | Other Investment Note Due 2024 Second Loan [Member]            
Schedule of Investments [Line Items]            
Debt instrument, interest rate, stated percentage 10.00%          
Financing receivable, face amount         $ 16,000,000.0  
Other investments $ 19,400,000          
Loans Receivable Interest Paid-In-Kind 5.00%          
Investment Maturity Date Jan. 01, 2024       Jul. 29, 2020