| Date | Acquired | Amount |
|---|---|---|
| Apr 13, 2017 |
|
$ 85,000,000 |
| Aug 08, 2016 |
|
$ 80,000,000 |
| Nov 02, 2015 |
|
$ 765,000,000 |
| Mar 18, 2008 |
|
Undisclosed amount |
