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Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Parenthetical) (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Derivative [Line Items]    
Notional Amount $ 25,977,000 $ 17,400,000
Forward-Starting Interest Rate Swap Agreements [Member]    
Derivative [Line Items]    
Notional Amount 9,400,000 4,700,000
Fair Value Hedges [Member]    
Derivative [Line Items]    
Impact of estimated fair value gain (losses) on hedging instruments 163,900 65,000
Cash Flow Hedges [Member]    
Derivative [Line Items]    
Impact of estimated fair value gain (losses) on hedging instruments $ 538,500 $ 329,700