Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Notes Payable Narrative (Details)

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BORROWINGS - Notes Payable Narrative (Details) - USD ($)
1 Months Ended
Aug. 31, 2021
Mar. 31, 2021
Sep. 30, 2022
Aug. 31, 2022
Mar. 31, 2022
Sep. 30, 2021
Debt Instrument [Line Items]            
Aggregate Principal Amount     $ 279,088,000     $ 276,484,000
Notes Payable            
Debt Instrument [Line Items]            
Aggregate Principal Amount     $ 262,488,000   $ 262,488,000  
Notes Payable | 5.00% Notes due 2026            
Debt Instrument [Line Items]            
Interest Rate   5.00% 5.00%   5.00%  
Aggregate Principal Amount   $ 127,900,000 $ 127,938,000   $ 127,938,000  
Proceeds from issuance of long-term debt   123,800,000        
Borrowings outstanding at cost   $ 4,100,000        
Notes payable, fair value disclosure     $ 121,800,000   $ 128,300,000  
Notes Payable | 4.875% Notes due 2028            
Debt Instrument [Line Items]            
Interest Rate 4.875%   4.875% 4.875% 4.875%  
Aggregate Principal Amount $ 134,600,000   $ 134,550,000   $ 134,550,000  
Proceeds from issuance of long-term debt 131,300,000          
Borrowings outstanding at cost $ 3,300,000          
Notes payable, fair value disclosure     $ 124,800,000   $ 134,300,000