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Derivative Instruments and Hedging Activities - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
derivative
Mar. 31, 2024
USD ($)
derivative
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, net liability position, aggregate fair value   $ 19,800
Cash collateral received   20,900
Interest rate derivatives    
Derivative Instruments, Gain (Loss) [Line Items]    
Cash collateral received $ 16,939 $ 19,772
Interest rate derivatives | Derivative Designated as Hedging Instrument | Fair Value Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Number of outstanding interest rate derivatives | derivative 6 6
Aggregate notional amount $ 472,500 $ 472,500
Number of interest rate derivatives entered into during the period | derivative 5  
Notional amount of derivatives entered into during the period $ 1,000,000  
Number of interest rate derivatives terminated | derivative 2  
Aggregate notional amount, terminated $ 550,000  
Notional amount of basis adjustments 4,600  
Interest rate swaps | Not Designated as Hedging Instrument    
Derivative Instruments, Gain (Loss) [Line Items]    
Aggregate notional amount $ 1,200,000 $ 1,200,000
Number of derivative instruments held | derivative 132 128
Interest rate caps | Not Designated as Hedging Instrument    
Derivative Instruments, Gain (Loss) [Line Items]    
Aggregate notional amount $ 55,600 $ 55,600
Number of derivative instruments held | derivative 2 2