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Derivative Instruments and Hedging Activities - Narrative (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) Swap position contract derivative | Dec. 31, 2022 USD ($) contract Swap position | Dec. 31, 2021 USD ($) contract position
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, net liability position, aggregate fair value | $ 16.9 |  |
Cash collateral received | $ 18.3 |  |
Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Reclassification, cash flow hedge, after tax |  |  | $ 25.9
Not Designated as Hedging Instrument | Minimum |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative expiration period | 30 days |  |
Not Designated as Hedging Instrument | Maximum |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative expiration period | 60 days |  |
Not Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative notional amount | $ 1,200.0 | $ 1,300.0 |
Number of interest rate swaps | Swap | 132 | 141 |
Not Designated as Hedging Instrument | Interest rate caps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative notional amount | $ 55.6 | $ 245.8 |
Number of interest rate swaps | Swap | 2 | 12 |
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of contracts terminated | contract |  |  | 4
Derivative notional amount |  |  | $ 850.0
Number of interest rate swaps | contract | 0 | 0 |
Fair Value Hedging | Designated as Hedging Instrument | Interest rate swaps |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of contracts terminated | position | 2 | 13 | 8
Derivative notional amount | $ 472.5 | $ 22.5 |
Number of interest rate swaps | position | 6 | 3 |
Notional amount of interest rate derivatives entered into during the period | $ 1,000.0 |  |
Fair Value Hedging | Designated as Hedging Instrument | Terminated interest rate swap |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative notional amount | $ 550.0 | $ 58.0 | $ 191.8
Fair Value Hedging | Designated as Hedging Instrument | Interest rate contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Number of interest rate derivatives entered into during the period | derivative | 5 |  |
Notional amount of basis adjustments | $ 4.6 |  |

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