Benefit Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 1,825,000 | $ 1,632,000 | $ 3,432,000 | $ 3,264,000 |
| Interest cost | 1,616,000 | 1,478,000 | 3,186,000 | 2,956,000 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (624,000) | (712,000) | (1,509,000) | (1,424,000) |
| Pension plan contributions | 0 | 0 | ||
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] | ||||
| Service cost | 1,825,000 | 1,632,000 | 3,432,000 | 3,264,000 |
| Interest cost | 1,616,000 | 1,478,000 | 3,186,000 | 2,956,000 |
| Expected return on plan assets | (4,035,000) | (3,834,000) | (8,070,000) | (7,668,000) |
| Recognized net actuarial loss | (30,000) | 12,000 | (57,000) | 24,000 |
| Benefit expense | (624,000) | (712,000) | (1,509,000) | (1,424,000) |
| Supplemental Employee Retirement Plan [Member] | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 182,000 | 194,000 | 383,000 | 388,000 |
| Interest cost | 232,000 | 182,000 | 442,000 | 364,000 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 414,000 | 376,000 | 825,000 | 752,000 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] | ||||
| Service cost | 182,000 | 194,000 | 383,000 | 388,000 |
| Interest cost | 232,000 | 182,000 | 442,000 | 364,000 |
| Benefit expense | $ 414,000 | $ 376,000 | $ 825,000 | $ 752,000 |
| X | ||||||||||
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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