| Date | Acquired | Amount |
|---|---|---|
| May 19, 2011 |
|
Undisclosed amount |
| Nov 16, 2010 |
|
$ 8,300,000 |
| Jun 14, 2010 |
|
$ 25,000,000 |
| Feb 18, 2010 |
|
$ 7,500,000 |
| Jun 07, 2002 |
|
Undisclosed amount |
