| Date | Acquired | Amount |
|---|---|---|
| Oct 09, 2017 |
|
Undisclosed amount |
| Sep 13, 2016 |
|
Undisclosed amount |
| May 31, 2016 |
|
$ 509,000,000 |
| Aug 02, 2012 |
|
Undisclosed amount |
| Aug 12, 2005 |
|
Undisclosed amount |
| Apr 16, 2004 |
|
Undisclosed amount |
