| Date | Acquired | Amount |
|---|---|---|
| Aug 07, 2006 |
|
Undisclosed amount |
| Feb 08, 2006 |
|
$ 80,000,000 |
| Oct 17, 2005 |
|
$ 78,500,000 |
| Dec 12, 2004 |
|
$ 118,000,000 |
