| Date | Acquired | Amount |
|---|---|---|
| Sep 10, 2015 |
|
Undisclosed amount |
| Dec 02, 2014 |
|
Undisclosed amount |
| Sep 21, 2010 |
|
Undisclosed amount |
| Sep 16, 2008 |
|
Undisclosed amount |
| Feb 04, 2008 |
|
$ 110,000,000 |
| Oct 20, 2005 |
|
Undisclosed amount |
| Feb 10, 2005 |
|
Undisclosed amount |
