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Deferred Compensation And Retirement Plans (Components Of Net Periodic Benefit Costs) (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Jan. 31, 2012
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Jan. 31, 2011
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Jan. 31, 2012
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Jan. 31, 2011
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| Deferred Compensation And Retirement Plans [Abstract] | ||||
| Service cost | $ 34,000 | $ 102,000 | ||
| Interest cost | 884,000 | 925,000 | 2,652,000 | 2,775,000 |
| Amortization of actuarial loss | 355,000 | 105,000 | 1,065,000 | 315,000 |
| Net periodic benefit costs | 1,239,000 | 1,064,000 | 3,717,000 | 3,192,000 |
| Company contributions to the ECAP | 200,000 | 15,500,000 | 400,000 | |
| Change in Fair Value of Vested Amounts owed under deferred compensation plan, (Income), Expense | $ 1,600,000 | $ 2,100,000 | $ (2,000,000) | $ 3,400,000 |
| Deferred compensation arrangement vesting terms | Participants generally vest in Company contributions over a four year period. | |||
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- Definition
Change In Fair Value Of Vested Amounts Owed Under Deferred Compensation Plan Income Expense No definition available.
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- Details
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- Definition
The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement. No definition available.
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- Definition
The minimum period that the individual is required to perform services in order to be fully vested under the deferred compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan. 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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- 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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