| Date | Acquired | Amount |
|---|---|---|
| Aug 22, 2017 |
|
Undisclosed amount |
| Jan 31, 2017 |
|
$ 65,000,000 |
| Dec 16, 2015 |
|
$ 14,000,000 |
| Dec 15, 2014 |
|
$ 20,000,000 |
| Oct 18, 2012 |
|
Undisclosed amount |
| Jun 15, 2011 |
|
Undisclosed amount |
