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

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		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	$ 140,200	$ 120,500	$ 140,200	$ 120,500	$ 117,000	$ 116,000	$ 115,300	$ 114,400
Unfunded Loan Commitments [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	6,200		6,200			$ 4,400
Reserve for credit losses	1,700	$ (400)	1,800	$ (800)
Acquired acquisition-related provision for credit losses	$ 500		$ 500