Loans - Narrative (Details)		3 Months Ended	6 Months Ended
	Jan. 06, 2022 USD ($)	Jun. 30, 2023 USD ($) loan	Jun. 30, 2023 USD ($) loan contract	Jun. 30, 2022 contract	Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable on loans		$ 25,200,000	$ 25,200,000		$ 24,500,000
Net deferred loan fees		(1,300,000)	(1,300,000)		2,100,000
Overdraft balances included in home equity and consumer loans		604,000	604,000		1,300,000
Loans pledged for actual and potential borrowings at the Federal Home Loan Bank		4,340,000,000	4,340,000,000		2,890,000,000
Financing receivable, nonaccrual, in the process of foreclosure		0	0		898,000
Net PCD loans	$ 124,431,000
Financing receivable, excluding accrued interest, modified in period, amount		0	$ 0
Financing receivable, accrual, troubled debt restructuring					2,600,000
Financing receivable, troubled debt restructuring, subsequent default, number of contracts | contract			0	0
Paycheck Protection Program ("PPP")
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss, fee, and loan in process		$ 389,000	$ 389,000		$ 435,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans still accruing | loan		0	0		0