| Date | Acquired | Amount |
|---|---|---|
| Jul 08, 2010 |
|
Undisclosed amount |
| Oct 16, 2006 |
|
Undisclosed amount |
| Sep 22, 2006 |
|
$ 175,000,000 |
| Aug 02, 2006 |
|
Undisclosed amount |
| Aug 01, 2006 |
|
$ 200,000,000 |
| Oct 13, 2005 |
|
$ 49,000,000 |
