|
Retained Earnings (Schedule Of Change In Retained Earnings) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Apr. 30, 2012
|
Apr. 30, 2011
|
Apr. 30, 2012
|
Apr. 30, 2011
|
|
| Retained Earnings [Abstract] | ||||
| Balance as of July 31, 2011 | $ 829,148 | |||
| Net income | 41,341 | 40,008 | 77,379 | 69,384 |
| Dividends paid | (24,387) | |||
| Balance as of April 30, 2012 | $ 882,140 | $ 882,140 | ||