|
Investments And Fair Value Measurements (Assets Measured At Fair Value Using Significant Unobservable Inputs) (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | ||
|---|---|---|---|
|
Jul. 31, 2011
|
Apr. 30, 2012
Level 3 [Member]
|
Apr. 30, 2012
Level 1 [Member]
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||
| Balances at July 31, 2011 | $ 2,042 | ||
| Net change in other comprehensive income | (6) | ||
| Net loss included in earnings | |||
| Purchases | |||
| Sales/Maturities | (400) | ||
| Balances at April 30, 2012 | 1,636 | ||
| Other investments securities | $ 8,715 | $ 8,791 |