| Date | Acquired | Amount |
|---|---|---|
| Jul 24, 2017 |
|
$ 100,000,000 |
| Nov 01, 2016 |
|
$ 425,000,000 |
| Aug 08, 2016 |
|
Undisclosed amount |
| Nov 15, 2015 |
|
Undisclosed amount |
| May 13, 2014 |
|
Undisclosed amount |
