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Deferred Compensation and Retirement Plans (Tables) | 12 Months Ended
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Apr. 30, 2012
Total Long-Term Benefit Obligations | The total benefit obligations for these plans were as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |
|  | (in thousands) |
Deferred compensation plans |  | $ | 78,479 |  |  | $ | 70,319 |
Pension plan |  |  | 4,214 |  |  |  | 3,952 |
International retirement plans |  |  | 2,776 |  |  |  | 3,153 |
Executive Capital Accumulation Plan |  |  | 71,134 |  |  |  | 67,214 |
Total benefit obligations |  |  | 156,603 |  |  |  | 144,638 |
Less: current portion of benefit obligation |  |  | (7,614 | ) |  |  | (5,080 | )
Non-current benefit obligation |  | $ | 148,989 |  |  | $ | 139,558 |
Deferred Compensation Plans [Member] |
Reconciliation Of Benefit Obligation | The following tables reconcile the benefit obligation for the deferred compensation plans:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (in thousands) |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation, beginning of year |  | $ | 70,319 |  |  | $ | 64,890 |  |  | $ | 52,149 |
Service cost |  |  | — |  |  |  | 137 |  |  |  | 339 |
Interest cost |  |  | 3,346 |  |  |  | 3,495 |  |  |  | 3,557 |
Plan participants’ contributions with interest |  |  | — |  |  |  | 65 |  |  |  | 194 |
Actuarial loss |  |  | 9,885 |  |  |  | 6,764 |  |  |  | 12,848 |
Benefits paid |  |  | (5,071 | ) |  |  | (5,032 | ) |  |  | (4,197 | )
Benefit obligation, end of year |  |  | 78,479 |  |  |  | 70,319 |  |  |  | 64,890 |
Less: current portion of benefit obligation |  |  | (4,959 | ) |  |  | (3,682 | ) |  |  | (4,000 | )
Non-current benefit obligation |  | $ | 73,520 |  |  | $ | 66,637 |  |  | $ | 60,890 |
Components Of Net Periodic Benefit Costs | The components of net periodic benefits costs are as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (in thousands) |
Service cost |  | $ | — |  |  | $ | 137 |  |  | $ | 339 |
Interest cost |  |  | 3,346 |  |  |  | 3,495 |  |  |  | 3,557 |
Amortization of actuarial loss |  |  | 1,374 |  |  |  | 422 |  |  |  | — |
Net periodic benefit cost |  | $ | 4,720 |  |  | $ | 4,054 |  |  | $ | 3,896 |
Weighted-Average Assumptions Used In Calculating The Benefit Obligations | The weighted-average assumptions used in calculating the benefit obligations were as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Discount rate, beginning of year |  |  | 4.94 | % |  |  | 5.61 | % |  |  | 7.10 | %
Discount rate, end of year |  |  | 3.79 | % |  |  | 4.94 | % |  |  | 5.61 | %
Rate of compensation increase |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Pension Plan [Member] |
Reconciliation Of Benefit Obligation | The following tables reconcile the benefit obligation for the pension plan:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (in thousands) |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation, beginning of year |  | $ | 3,952 |  |  | $ | 3,630 |  |  | $ | 3,125 |
Interest cost |  |  | 189 |  |  |  | 197 |  |  |  | 214 |
Actuarial loss |  |  | 289 |  |  |  | 307 |  |  |  | 503 |
Benefits paid |  |  | (216 | ) |  |  | (182 | ) |  |  | (212 | )
Benefit obligation, end of year |  |  | 4,214 |  |  |  | 3,952 |  |  |  | 3,630 |
Less: current portion of benefit obligation |  |  | (212 | ) |  |  | (137 | ) |  |  | (147 | )
Non-current benefit obligation |  | $ | 4,002 |  |  | $ | 3,815 |  |  | $ | 3,483 |
Components Of Net Periodic Benefit Costs | The components of net periodic benefits costs are as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (in thousands) |
Interest cost |  | $ | 189 |  |  | $ | 197 |  |  | $ | 214 |
Amortization of actuarial loss (gain) |  |  | 47 |  |  |  | (2 | ) |  |  | (78 | )
Net periodic benefit cost |  | $ | 236 |  |  | $ | 195 |  |  | $ | 136 |
Weighted-Average Assumptions Used In Calculating The Benefit Obligations | The weighted-average assumptions used in calculating the benefit obligations were as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Discount rate, beginning of year |  |  | 4.94 | % |  |  | 5.61 | % |  |  | 7.10 | %
Discount rate, end of year |  |  | 3.79 | % |  |  | 4.94 | % |  |  | 5.61 | %
Rate of compensation increase |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Expected Benefit Payments Associated With Future Service | Benefit payments, which reflect expected future service, as appropriate, are expected to be paid over the next ten years as follows:
Year Ending April 30, |  | Deferred Compensation Plans |  |  | Pension Benefits |
|  | (in thousands) |
2013 |  | $ | 5,601 |  |  | $ | 275 |
2014 |  |  | 6,134 |  |  |  | 308 |
2015 |  |  | 6,067 |  |  |  | 314 |
2016 |  |  | 6,075 |  |  |  | 310 |
2017 |  |  | 5,997 |  |  |  | 317 |
2018-2022 |  |  | 28,276 |  |  |  | 1,334 |
Executive Capital Accumulation Plan [Member] |
Reconciliation Of Benefit Obligation | Changes in the ECAP liability were as follows:
|  | Year Ended April 30, |
|  | 2012 |  |  | 2011 |
|  | (in thousands) |
Balance, beginning of year |  | $ | 67,214 |  |  | $ | 57,871 |
Employee contributions |  |  | 3,483 |  |  |  | 2,403 |
Amortization of employer contributions |  |  | 7,423 |  |  |  | 6,525 |
Gain on investment |  |  | 884 |  |  |  | 6,667 |
Employee distributions |  |  | (7,661 | ) |  |  | (6,567 | )
Exchange rate translations |  |  | (209 | ) |  |  | 315 |
Balance, end of year |  |  | 71,134 |  |  |  | 67,214 |
Less: current portion |  |  | (2,443 | ) |  |  | (1,261 | )
Non-current portion, end of year |  | $ | 68,691 |  |  | $ | 65,953 |

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