| Date | Acquired | Amount |
|---|---|---|
| Jun 07, 2012 |
|
Undisclosed amount |
| Oct 01, 2007 |
|
$ 45,000,000 |
| Apr 28, 2004 |
|
Undisclosed amount |
| Feb 06, 2001 |
|
$ 28,000,000 |
