| Date | Acquired | Amount |
|---|---|---|
| Aug 19, 2010 |
|
$ 37,000,000 |
| Aug 25, 2006 |
|
$ 69,000,000 |
| Mar 02, 2004 |
|
$ 150,000,000 |
| Oct 01, 2003 |
|
Undisclosed amount |
