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Pension and Other Postretirement Benefits (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Apr. 30, 2013
|
Apr. 30, 2012
|
Apr. 30, 2013
|
Apr. 30, 2012
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Pension Plan
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| Defined Benefit Plans and Other Postretirement Benefit Plans | ||||
| Service Cost | $ 437 | $ 331 | $ 1,313 | $ 993 |
| Interest Cost | 386 | 405 | 1,158 | 1,213 |
| Expected return on plan assets | (377) | (370) | (1,132) | (1,110) |
| Amortization of Prior service costs | 4 | 4 | 11 | 11 |
| Amortization of Other actuarial loss | 221 | 79 | 663 | 238 |
| Net periodic benefit cost | 671 | 449 | 2,013 | 1,345 |
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Postretirement Health Plan
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| Defined Benefit Plans and Other Postretirement Benefit Plans | ||||
| Service Cost | 34 | 26 | 102 | 78 |
| Interest Cost | 24 | 27 | 72 | 79 |
| Amortization of Net transition obligation | 4 | 4 | 12 | 12 |
| Amortization of Other actuarial loss | 13 | 7 | 39 | 22 |
| Net periodic benefit cost | $ 75 | $ 64 | $ 225 | $ 191 |