| Date | Acquired | Amount |
|---|---|---|
| Apr 05, 2017 |
|
Undisclosed amount |
| Apr 04, 2017 |
|
Undisclosed amount |
| Feb 09, 2017 |
|
Undisclosed amount |
| Jul 27, 2016 |
|
Undisclosed amount |
| Apr 05, 2016 |
|
$ 170,000,000 |
| Dec 09, 2015 |
|
$ 2,900,000,000 |
