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Derivative Financial Instruments - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Jun. 30, 2023
USD ($)
Dec. 31, 2024
USD ($)
Agreement
Dec. 31, 2023
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative assets and liabilities offset in balance sheet   $ 0  
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   $ 363,400 $ 394,400
Description of Conditions Relating to Clearing of Interest rate Swaps   These instruments contain language outlining collateral pledging requirements for each counterparty, in which collateral must be posted if market value exceeds certain agreed upon threshold limits. Cash or securities are pledged as collateral.  
Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value $ 1,000,000 $ 300,000  
Remaining Maturity Year 4 years    
Remaining Maturity 5 years    
Weighted average fixed rate 3.80%    
Fixed interest rate   3.95%  
Total fair value of instruments   $ 7,200  
Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   $ 300,000  
Weighted average fixed rate   4.20%  
Interest-rate Swap Agreements with Customers [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Number of interest-rate swap agreements | Agreement   109  
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   $ 363,400  
Interest rate swaps | Fair Value Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   700,000  
Interest rate swaps | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value   $ 300,000