Derivative Financial Instruments and Hedging Activities - Narrative (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Cash collateral held by counterparties subject to master netting agreements		$ 12,800,000
Cash collateral received from counterparties under master netting agreements	$ 81,030,000	0
Securities AFS , at estimated fair value	1,424,562,000	$ 2,764,325,000
Fair Value Hedging
Derivative [Line Items]
Securities AFS , at estimated fair value	708,900,000
Interest Rate Swap \| Cash Flow Hedging
Derivative [Line Items]
Derivative	$ 575,000,000

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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Nominal or face amount used to calculate payment on derivative.

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