| Date | Acquired | Amount |
|---|---|---|
| May 06, 2010 |
|
$ 130,000,000 |
| May 06, 2010 |
|
Undisclosed amount |
| Dec 17, 2008 |
|
Undisclosed amount |
| Oct 03, 2005 |
|
$ 75,600,000 |
| Sep 20, 2004 |
|
$ 27,500,000 |
