| Date | Acquired | Amount |
|---|---|---|
| Jan 13, 2017 |
|
Undisclosed amount |
| Feb 05, 2015 |
|
Undisclosed amount |
| Oct 16, 2014 |
|
Undisclosed amount |
| Dec 20, 2013 |
|
$ 2,500,000 |
| Sep 04, 2013 |
|
$ 44,000,000 |
