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Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Derivative [Line Items] |  |
Amortized cost of closed portfolios of AFS debt securities | $ 124.1 | $ 0.0
Gain on discontinuation of fair value hedge |  | 2.3
Mark-to-market adjustment |  | $ 0.3
Recorded period of effectiveness of fair value of derivatives on net income (in months) | 12 months |
Collateral Pledged |  |
Derivative [Line Items] |  |
Marketable Securities | $ 27.7 |

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- Definition Amount as of the balance sheet date of the unamortized adjustment to the carrying value of an interest-bearing hedged item made under an effective fair value hedge that is amortized upon discontinuation of the fair value hedge. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 35 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480295/815-25-35-9 + Details
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