|
INVESTMENTS: Investments (Details) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
6 Months Ended |
|
|
May 31, 2014
|
May 31, 2013
|
May 31, 2014
|
May 31, 2013
|
Nov. 30, 2013
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Short-term investments, carrying value |
$ 10,503 |
|
$ 10,503 |
|
$ 15,134 |
| Gain (Loss) on Trading Securities [Abstract] |
|
|
|
|
|
| Gain (loss) on trading investments |
255 |
671 |
314 |
1,240 |
|
|
Short-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
10,206 |
|
10,206 |
|
14,263 |
| Gross unrealized gain on investments |
297 |
|
297 |
|
871 |
| Short-term investments, carrying value |
10,503 |
|
10,503 |
|
15,134 |
|
Other Long-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
4,968 |
|
4,968 |
|
4,981 |
| Cost method investments, unrealized gains |
0 |
|
0 |
|
0 |
| Cost method securities, carrying value |
4,968 |
|
4,968 |
|
4,981 |
|
Trading securities [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Short-term investments, carrying value |
1,828 |
|
1,828 |
|
4,728 |
|
Trading securities [Member] | Short-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
1,531 |
|
1,531 |
|
3,857 |
| Gross unrealized gain on investments |
297 |
|
297 |
|
871 |
| Short-term investments, carrying value |
1,828 |
|
1,828 |
|
4,728 |
|
Available-for-sale securities [Member] | Other Long-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
974 |
|
974 |
|
909 |
| Available-for-sale securities, unrealized gains |
628 |
|
628 |
|
366 |
| Long term available-for-sale securities, carrying value |
1,602 |
|
1,602 |
|
1,275 |
|
Held-to-maturity securities [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Short-term investments, carrying value |
8,665 |
|
8,665 |
|
8,753 |
|
Held-to-maturity securities [Member] | Short-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
8,665 |
|
8,665 |
|
8,753 |
| Gross unrealized gain on investments |
0 |
|
0 |
|
0 |
| Short-term investments, carrying value |
8,665 |
|
8,665 |
|
8,753 |
|
Cost-method investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Short-term investments, carrying value |
10 |
|
10 |
|
1,653 |
|
Cost-method investments [Member] | Short-term Investments [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Investment, cost basis |
10 |
|
10 |
|
1,653 |
| Gross unrealized gain on investments |
0 |
|
0 |
|
0 |
| Short-term investments, carrying value |
$ 10 |
|
$ 10 |
|
$ 1,653 |
|
Minimum [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Held-to-maturity securities, maturity period |
|
|
3 months |
|
|
|
Maximum [Member]
|
|
|
|
|
|
| Gain (Loss) on Investments [Line Items] |
|
|
|
|
|
| Held-to-maturity securities, maturity period |
|
|
1 year |
|
|