|
Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) (USD $)
In Thousands, unless otherwise specified |
Aug. 31, 2012
|
Aug. 31, 2011
|
|---|---|---|
| Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract] | ||
| Net unrealized loss on derivatives, net of tax | $ 1,638 | $ 731 |
| Postretirement obligations, net of tax | (17,231) | (8,290) |
| Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (15,593) | $ (7,559) |