| Date | Acquired | Amount |
|---|---|---|
| Oct 19, 2017 |
|
Undisclosed amount |
| Mar 14, 2017 |
|
Undisclosed amount |
| Oct 13, 2016 |
|
Undisclosed amount |
| May 10, 2016 |
|
Undisclosed amount |
| Sep 21, 2015 |
|
Undisclosed amount |
| Jul 09, 2015 |
|
$ 222,000,000 |
