| Date | Acquired | Amount |
|---|---|---|
| Oct 11, 2019 |
|
Undisclosed amount |
| Jul 14, 2017 |
|
Undisclosed amount |
| Dec 05, 2016 |
|
Undisclosed amount |
| Aug 18, 2016 |
|
$ 680,000,000 |
| Mar 03, 2015 |
|
Undisclosed amount |
