|
Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified |
Nov. 30, 2011
|
Aug. 31, 2011
|
|---|---|---|
| Cash and cash equivalents related to variable interest entities (VIEs) (in Dollars) | $ 60,200 | $ 78,600 |
| Short-term investments related to VIEs (in Dollars) | 5,600 | 7,800 |
| Accounts receivable, including retainage, net related to VIEs (in Dollars) | 29,600 | 7,500 |
| Accumulated depreciation (in Dollars) | $ 362,600 | $ 347,300 |
| Preferred stock, shares authorized | 20,000,000 | 20,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, shares authorized | 200,000,000 | 200,000,000 |
| Common stock, shares issued | 91,746,268 | 91,711,102 |
| Common stock, shares outstanding | 71,340,594 | 71,306,382 |
| Treasury stock shares | 20,405,674 | 20,404,720 |