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Goodwill and Core Deposit Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 02, 2025	Mar. 31, 2025
Goodwill [Roll Forward]
Goodwill, Beginning Balance		$ 94,697
Goodwill, Period Increase (Decrease)		59,073
Goodwill, Ending Balance		$ 153,770
Finite-Lived Intangible Assets, Remaining Amortization Period		10 years
Northway Financial, Inc "NFI"
Goodwill [Roll Forward]
Goodwill, Period Increase (Decrease)	$ 59,100
Goodwill, Ending Balance	$ 59,073

X

- Definition

Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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- Definition

Amount of increase (decrease) of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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