|
Increase or (Decrease) in Carrying Value of Investment in Life Insurance Policies (Detail) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended | 12 Months Ended |
|---|---|---|
|
Jun. 30, 2012
|
Dec. 31, 2011
|
|
| Insurance Policy Or Life Settlement Contract, Effect of One Percentage Point Change [Line Items] | ||
| Life expectancy Plus 4 Months | $ (23,579) | $ (18,778) |
| Life expectancy Minus 4 Months | 26,574 | 20,785 |
| Discount Plus 1% | (16,653) | (13,802) |
| Discount Minus 1% | $ 19,040 | $ 15,804 |