| Date | Acquired | Amount |
|---|---|---|
| Jun 01, 2017 |
|
Undisclosed amount |
| Mar 01, 2017 |
|
Undisclosed amount |
| Nov 14, 2016 |
|
Undisclosed amount |
| May 24, 2016 |
|
Undisclosed amount |
| May 19, 2015 |
|
$ 20,000,000 |
| Oct 22, 2013 |
|
Undisclosed amount |
| Oct 30, 2012 |
|
Undisclosed amount |
| Aug 02, 2011 |
|
Undisclosed amount |
| Dec 17, 2008 |
|
Undisclosed amount |
| Jun 01, 2008 |
|
Undisclosed amount |
