| Date | Acquired | Amount |
|---|---|---|
| Sep 05, 2017 |
|
$ 705,000,000 |
| Jul 25, 2017 |
|
Undisclosed amount |
| Apr 03, 2016 |
|
$ 200,000,000 |
| Feb 02, 2016 |
|
Undisclosed amount |
| Oct 22, 2015 |
|
Undisclosed amount |
| Jul 28, 2010 |
|
Undisclosed amount |
| Dec 14, 2005 |
|
Undisclosed amount |
