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Notes and Contracts Payable (Narrative) (Detail)
$ in Millions
9 Months Ended
Sep. 30, 2024
USD ($)
Debt Instrument [Line Items]  
Debt instrument, interest rate terms Interest is due semi-annually on March 30 and September 30, beginning March 30, 2025.
Unsecured Debt  
Debt Instrument [Line Items]  
Unsecured notes $ 450.0
Effective interest rate 5.45%