| Date | Acquired | Amount |
|---|---|---|
| Aug 02, 2016 |
|
Undisclosed amount |
| Oct 23, 2007 |
|
Undisclosed amount |
| Jul 09, 2003 |
|
$ 309,000,000 |
| Feb 22, 2002 |
|
Undisclosed amount |
| Apr 25, 1988 |
|
$ 80,000,000 |
