|
Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
|
May 31, 2014
|
Feb. 28, 2014
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Money market securities |
$ 549,371 |
$ 641,622 |
| Mutual fund investments |
8,600 |
5,609 |
| Total assets at fair value |
557,971 |
647,231 |
| Percent of total assets at fair value |
100.00% |
100.00% |
| Percent of total assets |
4.60% |
5.50% |
| Derivative instruments |
2,130 |
1,351 |
| Total liabilities at fair value |
2,130 |
1,351 |
| Percent of total liabilities |
0.00% |
0.00% |
|
Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Money market securities |
549,371 |
641,622 |
| Mutual fund investments |
8,600 |
5,609 |
| Total assets at fair value |
557,971 |
647,231 |
| Percent of total assets at fair value |
100.00% |
100.00% |
| Percent of total assets |
4.60% |
5.50% |
| Derivative instruments |
0 |
0 |
| Total liabilities at fair value |
0 |
0 |
| Percent of total liabilities |
0.00% |
0.00% |
|
Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Money market securities |
0 |
0 |
| Mutual fund investments |
0 |
0 |
| Total assets at fair value |
0 |
0 |
| Percent of total assets at fair value |
0.00% |
0.00% |
| Percent of total assets |
0.00% |
0.00% |
| Derivative instruments |
2,130 |
1,351 |
| Total liabilities at fair value |
$ 2,130 |
$ 1,351 |
| Percent of total liabilities |
0.00% |
0.00% |