| Date | Acquired | Amount |
|---|---|---|
| Sep 02, 2014 |
|
Undisclosed amount |
| Dec 04, 2012 |
|
Undisclosed amount |
| May 11, 1998 |
|
$ 280,000,000 |
| Jan 14, 1998 |
|
$ 55,000,000 |
| Feb 07, 1996 |
|
Undisclosed amount |
