| Date | Acquired | Amount |
|---|---|---|
| Aug 12, 2014 |
|
Undisclosed amount |
| Aug 11, 2005 |
|
$ 50,000,000 |
| Oct 24, 2002 |
|
$ 20,000,000 |
| Feb 23, 1998 |
|
Undisclosed amount |
