| Date | Acquired | Amount |
|---|---|---|
| Oct 04, 2017 |
|
$ 35,500,000 |
| Dec 18, 2015 |
|
$ 178,000,000 |
| May 11, 2015 |
|
$ 4,000,000 |
| Jan 27, 2011 |
|
Undisclosed amount |
| Dec 17, 2009 |
|
Undisclosed amount |
| Oct 27, 2009 |
|
$ 1,600,000 |
| Sep 24, 2008 |
|
Undisclosed amount |
