Derivative Financial Instruments - Additional information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Derivative [Line Items]
Maximum length of time hedged in cash flow hedge			4 years
Credit exposure to settled variation margin in excess of customer related interest rate swap	$ 100,000		$ 100,000		$ 0
Notional Amount	2,400,000,000		2,400,000,000		2,400,000,000
Derivative, gain (loss) on derivative, net (less than during the three months ended September 30, 2023 and September 30, 2022)	(100,000)	$ (100,000)	(100,000)	$ (200,000)
Derivative asset	26,344,000		26,344,000		23,861,000
Loan Origination Commitments
Derivative [Line Items]
Notional Amount	12,200,000		12,200,000		8,300,000
Derivative asset	100,000		100,000		100,000
Forward Contracts
Derivative [Line Items]
Notional Amount	8,500,000		8,500,000		10,000,000
Non Cleared Derivative Transactions | Customer Related Interest Rate Swap Derivatives
Derivative [Line Items]
Fair value of interest rate swap liabilities that are net in a net liability position	0		0		0
Cash and Cash Equivalents | Non Cleared Derivative Transactions | Customer Related Interest Rate Swap Derivatives
Derivative [Line Items]
Additional collateral posted	1,000,000		1,000,000		1,000,000
Restricted Assets | Cash and Cash Equivalents | Cleared Derivative Transaction
Derivative [Line Items]
Additional collateral posted	84,200,000		84,200,000		$ 84,100,000
Interest Income | Active Cash Flow Hedges
Derivative [Line Items]
Interest rate swap cash flow hedges amount expected to reclassified from other comprehensive income to income statement in the next twelve months	$ 54,100,000		$ 54,100,000