| Date | Acquired | Amount |
|---|---|---|
| Aug 02, 2017 |
|
Undisclosed amount |
| Jun 06, 2016 |
|
$ 85,000,000 |
| Jul 15, 2014 |
|
$ 30,000,000 |
| Mar 01, 2013 |
|
Undisclosed amount |
