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 6 Months Ended
Nov. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Oct. 31, 2019
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Nov. 04, 2021
Nov. 01, 2021
Debt Instrument [Line Items]                  
Aggregate principal amount         $ 200,000,000 $ 200,000,000      
Proceeds from issuance of notes payable         0 $ 50,000,000      
Interest payable         2,779,000   $ 2,517,000    
Notes Payable | 3.75% Notes due 2027                  
Debt Instrument [Line Items]                  
Aggregate principal amount $ 50,000,000                
Interest rate 3.75%             3.75%  
Proceeds from issuance of notes payable $ 48,500,000                
Interest payable $ 1,900,000                
Notes payable, fair value disclosure         45,500,000        
Notes Payable | 5.125% Notes due 2026                  
Debt Instrument [Line Items]                  
Aggregate principal amount   $ 50,000,000 $ 100,000,000            
Interest rate     5.125%            
Proceeds from issuance of notes payable   $ 50,600,000 $ 97,700,000            
Interest payable     $ 7,700,000            
Notes payable, fair value disclosure         $ 145,500,000        
Notes Payable | 5.375% Notes due 2024                  
Debt Instrument [Line Items]                  
Aggregate principal amount       $ 38,800,000         $ 38,800,000
Interest rate       5.375%          
Proceeds from issuance of notes payable       $ 37,500,000