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Note 4 - Fair Value Measurements (Detail) - Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis (USD $)
In Thousands, unless otherwise specified
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Nov. 30, 2011
|
Aug. 31, 2011
|
|
Estimate of Fair Value, Fair Value Disclosure [Member] | Certificates of Deposit [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
$ 319,386 |
$ 461,786 |
|
Estimate of Fair Value, Fair Value Disclosure [Member] | Stock and Bond Mutual Funds [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
26,346 |
6,473 |
|
Estimate of Fair Value, Fair Value Disclosure [Member] | US Government Agencies Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
613 |
1,806 |
|
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
29,595 |
34,187 |
|
Estimate of Fair Value, Fair Value Disclosure [Member] | Equity Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
4,991 |
|
|
Estimate of Fair Value, Fair Value Disclosure [Member] | Total [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
380,931 |
504,252 |
|
Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Interest rate swap contract |
19,322 |
27,059 |
| Foreign currency forward assets |
83 |
1,955 |
| Foreign currency forward liabilities |
172 |
16 |
|
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 1 [Member] | Stock and Bond Mutual Funds [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
26,346 |
6,473 |
|
Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
4,991 |
|
|
Fair Value, Inputs, Level 1 [Member] | Total [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
31,337 |
6,473 |
|
Fair Value, Inputs, Level 1 [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Interest rate swap contract |
0 |
0 |
| Foreign currency forward assets |
0 |
0 |
| Foreign currency forward liabilities |
0 |
0 |
|
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
319,386 |
461,786 |
|
Fair Value, Inputs, Level 2 [Member] | Stock and Bond Mutual Funds [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
613 |
1,806 |
|
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
29,595 |
34,187 |
|
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
|
|
Fair Value, Inputs, Level 2 [Member] | Total [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
349,594 |
497,779 |
|
Fair Value, Inputs, Level 2 [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Interest rate swap contract |
19,322 |
27,059 |
| Foreign currency forward assets |
83 |
1,955 |
| Foreign currency forward liabilities |
172 |
16 |
|
Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 3 [Member] | Stock and Bond Mutual Funds [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
|
|
Fair Value, Inputs, Level 3 [Member] | Total [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Short-Term and Restricted Short-Term Investments |
0 |
0 |
|
Fair Value, Inputs, Level 3 [Member]
|
|
|
| Short-term and Restricted Short-term Investments |
|
|
| Interest rate swap contract |
0 |
0 |
| Foreign currency forward assets |
0 |
0 |
| Foreign currency forward liabilities |
$ 0 |
$ 0 |