|
Realized and Net Change in Unrealized Gains (Losses), Other Investments (Detail) (Other Investments, USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
|
Other Investments
|
||||
| Gain (Loss) on Investments [Line Items] | ||||
| Realized Gains (Losses) | $ 541 | $ 399 | $ 796 | $ 399 |
| Net Change in Unrealized Gains (Losses) | (2,547) | 343 | 190 | 1,292 |
| Total realized and net change in unrealized gains (losses) | $ (2,006) | $ 742 | $ 986 | $ 1,691 |