| Date | Acquired | Amount |
|---|---|---|
| Sep 20, 2017 |
|
Undisclosed amount |
| May 29, 2017 |
|
Undisclosed amount |
| Dec 10, 2016 |
|
$ 500,000,000 |
| Dec 10, 2016 |
|
Undisclosed amount |
| Oct 01, 2015 |
|
Undisclosed amount |
| Sep 17, 2015 |
|
Undisclosed amount |
| May 05, 2015 |
|
$ 589,000,000 |
| Jan 09, 2015 |
|
Undisclosed amount |
| Oct 13, 2014 |
|
Undisclosed amount |
| Aug 14, 2014 |
|
Undisclosed amount |
| Jul 22, 2014 |
|
Undisclosed amount |
| Jun 28, 2014 |
|
Undisclosed amount |
| Jun 26, 2014 |
|
Undisclosed amount |
| Jun 05, 2014 |
|
Undisclosed amount |
