| Date | Acquired | Amount |
|---|---|---|
| Oct 02, 2015 |
|
Undisclosed amount |
| May 13, 2015 |
|
Undisclosed amount |
| Mar 30, 2015 |
|
$ 307,000,000 |
| Dec 15, 2011 |
|
Undisclosed amount |
| Jun 13, 2006 |
|
Undisclosed amount |
| Jan 19, 2005 |
|
$ 230,000,000 |
