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Pension and Other Postretirement Benefit Plans (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Mar. 31, 2013
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Mar. 31, 2012
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Mar. 31, 2013
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Mar. 31, 2012
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Pension [Member]
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| Net periodic benefit cost [Abstract] | ||||
| Service cost | $ 1,685 | $ 1,424 | $ 3,370 | $ 2,848 |
| Interest cost | 1,913 | 1,950 | 3,826 | 3,900 |
| Expected return on plan assets | (2,243) | (1,953) | (4,486) | (3,906) |
| Amortization [Abstract] | ||||
| Prior service cost | (52) | (11) | (104) | (22) |
| Net actuarial loss | 1,806 | 1,680 | 3,612 | 3,360 |
| Net benefit cost | 3,109 | 3,090 | 6,218 | 6,180 |
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Other Postretirement [Member]
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| Net periodic benefit cost [Abstract] | ||||
| Service cost | 199 | 182 | 398 | 364 |
| Interest cost | 282 | 321 | 564 | 642 |
| Expected return on plan assets | 0 | 0 | 0 | 0 |
| Amortization [Abstract] | ||||
| Prior service cost | (68) | (113) | (136) | (226) |
| Net actuarial loss | 110 | 134 | 220 | 268 |
| Net benefit cost | 523 | 524 | 1,046 | 1,048 |
| Benefit plan contributions [Abstract] | ||||
| Other postretirement plan | 441 | |||
| Additional contributions expected in fiscal 2013 | 665 | 665 | ||
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Supplemental Retirement Plan [Member]
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| Benefit plan contributions [Abstract] | ||||
| Supplemental retirement plan | 362 | |||
| Additional contributions expected in fiscal 2013 | $ 358 | $ 358 | ||
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- Details
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- Details
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- Definition
Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. No definition available.
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- Definition
An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of cash or cash equivalents contributed by the entity to fund its pension plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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