| Date | Acquired | Amount |
|---|---|---|
| Sep 11, 2017 |
|
Undisclosed amount |
| May 24, 2017 |
|
Undisclosed amount |
| Oct 24, 2013 |
|
Undisclosed amount |
| Mar 28, 2013 |
|
Undisclosed amount |
| Feb 27, 2013 |
|
Undisclosed amount |
| Feb 09, 2011 |
|
Undisclosed amount |
| Dec 16, 2010 |
|
Undisclosed amount |
| Oct 23, 2008 |
|
$ 11,500,000 |
| Oct 22, 2008 |
|
Undisclosed amount |
| Sep 13, 2007 |
|
Undisclosed amount |
