Allowance for Credit Losses and Credit Quality of Loans, Allowance for Credit Losses on Off-Balance Sheet Credit Exposures (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	$ 117,000	$ 115,300	$ 116,000	$ 114,400
Unfunded Loan Commitments [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	4,500		$ 4,400
Reserve for credit losses	$ 100	$ (500)

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant