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Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Outside Director Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contribution to employee benefit plans		$ 0.1
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Contribution to employee benefit plans		$ 0.3
Contribution to other postretirement benefit plans	$ 0.1
Employee Pension Plan | Savings Bank
Defined Benefit Plan Disclosure [Line Items]
Contribution to employee benefit plans	$ 0.0

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

+ References

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- Details

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- Details

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Period Type:

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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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